2023 CMS Winter Meeting

Montreal, Dec 1 - 4, 2023


Scientific Sessions

Please note that all times are displayed in Eastern Standard Time (EST).

A celebration in honor of Jean-Marie De Koninck's 75th birthday: Elementary and Analytic Number Theory
Org: Nicolas Doyon and William Verreault (Université Laval)
This session focuses on the work of Jean-Marie De Koninck and his numerous research contributions in number theory on the occasion of his 75th birthday. The goal is to bring together colleagues, students, and collaborators of Jean-Marie De Koninck to exchange ideas on past work or new directions in elementary and analytic number theory.
Saturday December 2  (Symphonie 4B)
8:00 - 8:30 William Verreault (University of Toronto), On the tower factorization of integers
8:30 - 9:00 Gary Walsh (University of Ottawa), Powerful Numbers, Elliptic Curves and other Keywords
9:00 - 9:30 Chi Hoi (Kyle) Yip (University of British Columbia), Diophantine tuples over integers and finite fields
9:30 - 10:00 Sun-Kai Leung (Université de Montréal), Central limit theorems for arithmetic functions in short intervals
10:00 - 10:30 Omar Kihel (Brock University), On the index of a number field and some connected open questions
15:00 - 15:30 Cihan Sabuncu (Université de Montréal), On the moments of the number of representations as sums of two prime squares
15:30 - 16:00 Hugo Chapdelaine (Université Laval), Conditional convergence in the critical strip for lattice zeta functions associated to totally real fields
16:00 - 16:30 Siva Nair (Université de Montréal), The Mahler measure of some polynomial families
16:30 - 17:00 Arthur Bonkli Razafindrasoanaivolala (Université Laval), Integers with a sum of co-divisors yielding a square
17:00 - 17:30 Florian Luca (Wits University), On the index of friability
17:30 - 18:00 Theophilus Agama (Université Laval), On the joint work of Jean-Marie De Koninck and Imre Kátai
Advancements in Matrix Theory with Applications
Org: Avleen Kaur (University of British Columbia), Karen Meagher (University of Regina) and Hermie Monterde (University of Manitoba)
This session features talks that showcase results in various topics within pure and applied matrix theory, broadly construed. A strength of this session is that many of the speakers work on the applications of techniques from spectral theory, numerical linear algebra and operator theory, both in the real world and in other areas of pure mathematics. One of our goals is to learn how these tools can be adeptly utilized to address intricate challenges spanning diverse fields.
Saturday December 2  (Creation)
8:30 - 9:00 Minerva Catral (Xavier University), Spectral properties of a structured matrix related to a system of second order ODEs
9:00 - 9:30 Amy Yielding (Eastern Oregon University), An Investigation of Coefficient Sign Arbitrary Patterns
9:30 - 10:00 Jane Breen (Ontario Tech University), A structured condition number for Kemeny's constant
10:00 - 10:30 Erin Meger (Queen's University), The Spectral Gap of Iterative Complex Networks
15:00 - 15:30 Christina Christara (University of Toronto), Properties of matrices arising from Black-Scholes equations
15:30 - 16:00 Malena Espanol (Arizona State University), Variable Projection Methods for Separable Nonlinear Inverse Problems
16:00 - 16:30 Eric Evert (Northwestern University), Free extreme points of free spectrahedrops and generalized free spectrahedra
16:30 - 17:00 Brock Klippenstein (University of Manitoba), Numerical Solution of Non-Normal Coefficient Sylvester Equations for Partial Differential Equations
17:00 - 17:30 Xiaohong Zhang (Université de Montreal), Laplacian cospectral graphs
17:30 - 18:00 Harmony Zhan (Worcester Polytechnic Institute), Spectra of line digraphs and their applications
Sunday December 3  (Creation)
8:30 - 9:00 Michael Tait (Villanova University), Counting subgraphs using graph eigenvalues
9:00 - 9:30 Hermie Monterde (University of Manitoba), Hadamard diagonalizability and generalizations
9:30 - 10:00 Ludovick Bouthat (Université Laval), The Geometry of the Birkhoff Polytope
10:00 - 10:30 Frédéric Morneau-Guérin (Université TÉLUQ), The diameter of the Birkhoff polytope
15:00 - 15:30 Avleen Kaur (University of British Columbia), Unravelling the Friedrichs Angle: A Key to Lower Bounds on the Minimum Singular Value
15:30 - 16:00 Heather Switzer (William and Mary), Exploring the Advantages of Using Sketched Krylov Methods in PRIMME
16:00 - 16:30 Ian Thompson (University of Manitoba), Peaking phenomena in finite-dimensions
16:30 - 17:00 Paul Skoufranis (York University), Matrix Majorization in Non-Commutative Contexts
17:00 - 17:30 Jocelyn Chi (Rice University), Revisiting Symmetric Tensor Decompositions
Algebraic and Enumerative Combinatorics
Org: Alejandro Morales (Université du Québec à Montréal (UQAM)), Mohamed Omar (York University) and Vasu Tewari (University of Toronto)
Description: Recent trends in algebraic and enumerative combinatorics have opened doors to promising techniques to resolve central questions in the fields. Furthermore, methods from disparate areas of algebra and geometry have shed light on novel approaches to problems that have previously been intractable. This session brings together combinatorialists to share their developments in these recent trends.
Sunday December 3  (Symphonie 3B)
8:30 - 9:00 Angele Foley (Wilfrid Laurier), H-Chromatic Symmetric Functions
9:00 - 9:30 Kelvin Chan (York University), A cocharge folklore and super coinvariant spaces
9:30 - 10:00 Lucas Gagnon (York University), The shadows of quasisymmetric Templerley—Lieb coinvariants are noncrossing partitions
10:00 - 10:30 Farid Aliniaeifard (UBC), Generalized chromatic functions
15:00 - 15:30 GaYee Park (UQAM), Generalized parking function
15:30 - 16:00 Jeremy Chizewer (Waterloo), Enumeration and Compact Encoding of AVL Trees
16:00 - 16:30 Sam Hopkins (Howard University), Combinatorial reciprocity for non-intersecting paths
16:30 - 17:00 Karen Yeats (Waterloo), Combinatorial interpretation of the coefficients of the BDG action
17:00 - 17:30 Dave Anderson (Ohio State University), New formulas for Schubert polynomials via bumpless pipe dreams
17:30 - 18:00 Prateek Vishwakarma (University of Regina), Plücker inequalities for weakly separated coordinates in totally nonnegative Grassmannian
Monday December 4  (Symphonie 3B)
8:30 - 9:00 Spencer Backman (Vermont), Higher Categorical Associahedra
9:00 - 9:30 Gabe Udell (Cornell), Degenerating brick manifolds and subdividing the associahedron
9:30 - 10:00 Jose Bastidas (UQAM), Alcoved signed permutations
10:00 - 10:30 Marie Albenque (IRIF, Université Paris Cité), Bijective proof of rational enumerative schemes for maps on the torus of genus $g$.
15:30 - 16:00 Sarah Brauner (UQAM), Card shuffling, derangements, and q-analogues
16:00 - 16:30 Jonathan Boretsky (Harvard), The Totally Nonnegative Tropical Flag Variety
16:30 - 17:00 Franco Saliola (UQAM), Left Regular Bands of Groups and the Mantaci-Reutenauer Algebra
Algebraic Graph Theory for Walking on Graphs
Org: Sooyeong Kim (York University), Hermie Monterde (University of Manitoba), Christopher Van Bommel (Guelph University), Harmony Zhan (Worcester Polytechnic Institute) and Xiaohong Zhang (Université de Montréal)
The study of walks on graphs, particularly quantum walks and random walks, has become increasingly relevant in both pure and applied mathematics mainly due to their useful applications, especially in quantum computing and network science. Algebraic graph theory is the application of algebraic methods, broadly construed, to the study of graphs. Over the years, the use of techniques from algebraic graph theory has produced many beautiful and interesting results in the study of walks on graphs. The goal of this scientific session is to bring together mathematicians working in the interplay of these two areas to discuss their recent work, disseminate new ideas, and hopefully inspire future collaborations.
Sunday December 3  (Symphonie 4B)
8:00 - 8:30 Harmony Zhan (Worcester Polytechnic University), $\epsilon$-uniform mixing in discrete quantum walks
8:30 - 9:00 Neal Madras (York University), Must random walk move rapidly on either a graph or its complement?
9:00 - 9:30 Mariia Sobchuk (University of Waterloo), Quantum isomorphisms
9:30 - 10:00 Sooyeong Kim (York University), Kemeny's constant and enumerating Braess edges in trees
10:00 - 10:30 Paula Kimmerling (Washington State University), Continuous-Time Quantum Walks on Windmill Graphs
15:00 - 15:30 Chris Godsil (University of Waterloo), Coefficient Matrices
15:30 - 16:00 Christopher van Bommel (University of Guelph), Fidelities and Readout Times of Quantum State Transfer
16:00 - 16:30 Luc Vinet (Université de Montréal), $m$-distance regular graphs and multivariate $P$-polynomial association schemes
16:30 - 17:00 Yujia Shi (Northeastern University), Quantifying Transfer Strength on Graphs with Finite Cospectrality
17:00 - 17:30 Gabor Lippner (Northeastern University), Instability of transfer strength
17:30 - 18:00 Christino Tamon (Clarkson University), Do quantum walks obey speed limits?
Monday December 4  (Symphonie 4B)
8:00 - 8:30 Xiaohong Zhang (Universite de Montreal), Local uniform mixing
8:30 - 9:00 David Feder (University of Calgary), Two-step perfect quantum state transfer on graphs
9:00 - 9:30 Aysa Tajeri (York University), Pretty good state transfer on cycles
9:30 - 10:00 Mark Kempton (Brigham Young University), Non-backtracking random walks: mixing rate, Kemeny's constant, and related parameters
10:00 - 10:30 Adam Knudson (Brigham Young University), A Nordhauss-Gaddum type problem for the normalized Laplacian spectrum and graph Cheeger constant
Algebraic, Arithmetic and Kahler Geometry: Recent developments
Org: Xi Chen (University of Alberta), Nathan Grieve (Acadia U./Carleton U./UQAM/U. Waterloo) and Adrien Zahariuc (University of Windsor)
There is a strong interplay amongst the areas of Algebraic, Arithmetic and Kahler Geometry. The main objects of interest are complex projective manifolds and the modern day framework in which these disciplines operate are made possible by foundational contributions of Riemann, Zariski, Weil, Chern and their schools. The respective disciplines employ algebraic, number theoretic and differential analytic tools to make progress towards the birational classification problem, the question of existence, distribution and complexity of rational and integral points within projective varieties, and finally the questions of moduli and stability (in their many flavours). The proposed session will provide an opportunity for researchers, at all career stages— including graduate students, postdoctoral fellows and early career researchers— who are working in these deep overlapping, foundational and continually developing areas of pure and applied mathematics to report on their recent and ongoing programs. An exciting aspect of the proposed session is that it seeks to bring together researchers, to Montreal, from all parts of Canada.
Saturday December 2  (Symphonie 2B)
8:00 - 8:30 Sam Payne (University of Texas), Cohomology groups of moduli spaces of curves
8:30 - 9:00 Steven Lu (UQAM), Rigidity of maps into moduli space of polarized varieties
9:00 - 9:30 Debaditya Raychaudhury (University of Arizona), On the singularities of secant varieties
9:30 - 10:00 Ethan Ross (University of Toronto), Singular Reduction of Polarizations
10:00 - 10:30 Changho Han (University of Waterloo), Extending Torelli map from Smyth's alternative compactifications of the moduli of curves
15:00 - 15:30 Zinovy Reichstein (UBC), Essential dimension of symmetric groups in prime characteristic
15:30 - 16:00 Dave Anderson (Ohio State University), Refined transversality and equivariant positivity
16:00 - 16:30 Katrina Honigs (SFU), Hyperkahler varieties of Kummer type and torsion points of abelian surfaces
16:30 - 17:00 Carlo Scarpa (UQAM), The Einstein-Hilbert functional and K-stability
17:00 - 17:30 Sasha Zotine (Queen’s University), Kawaguchi-Silverman Conjecture for Projective Bundles on Curves
Sunday December 3  (Symphonie 2B)
8:00 - 8:30 Andrew Harder (Lehigh University), Tropical homology and mirror symmetry
8:30 - 9:00 Michael Groechenig (University of Toronto), p-adic integration, buildings and BPS invariants
9:00 - 9:30 Julien Keller (UQAM), Variational and non-archimedean aspects of the correspondence for vector bundles
9:30 - 10:00 Houari Benammar Ammar (UQAM), Slope inequality for an arbitrary divisor.
10:00 - 10:30 Joel Kamnitzer (McGill University), Moduli space of cactus flower curves
Automorphic representations and p-adic aspects of the Langlands program
Org: Mathilde Gerbelli-Gauthier (McGill University) and Gilbert Moss (University of Maine)
Automorphic forms are a central object of study in modern number theory. Born of classical questions surrounding quadratic forms in 1960's, their theory has evolved to reveal interrelations between algebraic geometry, representation theory, and complex analysis. The connections between L-functions of automorphic forms and Galois representations are the subject of the rapidly-evolving Langlands program, encompassing many deep theorems and open conjectures. This session will focus on new tools being developed in both the global and local settings, with the aim of bringing together researchers from across Canada and showcasing the contributions of early-career mathematicians.
Saturday December 2  (UQAM - PK-2205)
9:00 - 9:30 Romain Branchereau (McGill), Toroidal integrals of Kudla-Millson forms and diagonal restrictions of Hilbert modular forms
9:30 - 10:00 Erman Isik, On anticyclotomic Iwasawa theory of Hecke characters for ordinary primes
10:00 - 10:30 Paul Mezo (Carleton), Arthur packets for real unitary groups
15:00 - 15:30 Mishty Ray (Calgary), Vogan's conjecture for $p$-adic $GL_n$
15:30 - 16:00 Henry Kim (Toronto), Distribution of Hecke eigenvalues for holomorphic Siegel modular forms
16:00 - 16:30 Martí Roset Julià (McGill), Dihedral long root local A-packets of $G_2$ via theta correspondence
16:30 - 17:00 Giovanni Rosso (Concordia), Hirzebruch–Zagier cycles in $p$-adic families and adjoint $L$-values
17:00 - 17:30 Ting-Han Huang (Concordia), Special values of triple product p-adic L-functions and p-adic Abel-Jacobi maps
17:30 - 18:00 Monica Nevins (Ottawa), Semisimple characters of fixed-point subgroups
Sunday December 3  (UQAM - PK-2205)
9:00 - 9:30 James Steele (Calgary), Koszul duality phenomenon in the p-adic local Langlands
9:30 - 10:00 Ekta Tiwari (Ottawa), Irreducible supercuspidals of unramified $U(1,1)$
10:00 - 10:30 Patrick Allen (McGill), Minimal R = T in the absence of minimal lifts
Cluster Algebras in Representation Theory
Org: Elie Casbi (Northeastern University), Sabin Cautis (University of British Columbia), Anne Dranowski (University of Southern California) and Iva Halacheva (Northeastern University)
Cluster algebras were introduced in 2000 by Fomin and Zelevinsky as a tool for studying canonical bases and positivity for semisimple Lie groups. They have since found applications in myriads of settings such as tropical calculus, Poisson geometry, categorification, geometric Langlands, differential equations, quantum field theory and mirror symmetry. Modern constructions often employ non-commutative geometry (e.g. Poisson geometry of cluster varieties, character formulae from quiver Grassmannians) and higher algebra (e.g. module categories for quiver Hecke algebras, affine quantum groups, the coherent Satake category) to tackle questions originally formulated in the language of cluster algebras. These frameworks provide powerful tools for investigating rich combinatorics (e.g. hook length formulae, webs, polytopes) and math physics phenomena (e.g. scattering amplitudes, wall-crossing). They also seldom communicate. One of the main objectives of the proposed session is therefore to facilitate a diverse group of researchers to share their unique perspectives by presenting their own recent cluster-theoretic advances in an accessible way. Significant open problems our session hopes to shed light on include:

• When does a representation theoretic canonical basis contain the cluster monomials? • To what extent does tropical geometry control cluster structure? • Can representation theory explain the appearance of cluster structure in math physics?

Saturday December 2  (Inspiration Room)
9:00 - 9:30 Joel Kamnitzer (McGill), Cluster algebras, MV polytopes, and MV cycles
9:30 - 10:00 Tom Gannon (UCLA), Proof of the Ginzburg-Kazhdan conjecture
10:00 - 10:30 Kayla Wright (UMN), Higher Dimers, Webs and Grassmannian Cluster Algebras
15:00 - 15:30 Karen Yeats (Waterloo), T-duality by Le diagrams
15:30 - 16:00 Yu Li (Toronto), Integrable systems on the dual of nilpotent Lie subalgebras and $T$-Poisson cluster structures
16:00 - 16:30 Theo Pinet (Institut de Mathématiques de Jussieu-Paris Rive Gauche), Inflations for representations of shifted quantum affine algebras
16:30 - 17:00 Milen Yakimov (Northeastern), Finite generation and representation theory of quantum cluster algebras at roots of unity
17:00 - 17:30 James Hughes (Duke), Cluster Modular Groups of Braid Varieties
Sunday December 3  (Inspiration Room)
8:30 - 9:00 Dinushi Munasinghe (Toronto), Schur Algebras in Type B
9:00 - 9:30 Gordana Todorov (Northeastern), Higher Auslander Algebras and Fundamental Domains of Cluster Categories
9:30 - 10:00 Hugh Thomas (UQAM), Generalized associahedra as moment polytopes
10:00 - 10:30 Alexis Leroux Lapierre (McGill), An algebraic equivariant multiplicity using limits of characters
Schedule to be determined
Yan Zhou (Northeastern), Inspiration Room
Combinatorial Design Theory
Org: Andrea Burgess (UNB, Saint John), David Pike (Memorial University) and Douglas Stinson (University of Waterloo & Carleton University)
Combinatorial design theory has a history dating back to the 18th century when Leonhard Euler pondered the existence of orthogonal pairs of Latin squares. This session will showcase recent results in topics such as classical designs, cycle systems, graph decompositions, Latin squares and other aspects of design theory.
Saturday December 2  (Soprano C)
8:30 - 9:00 Bill Martin (WPI), Delsarte designs in finite groups
9:00 - 9:30 Kianoosh Shokri (Ottawa), Improving upper bounds on the size of some covering arrays of strength 3
9:30 - 10:00 Guillermo Nunez Ponasso (WPI), Maximal determinants of matrices with entries in the roots of unity
10:00 - 10:30 Mateja Sajna (Ottawa), A recursive construction of solutions to the directed Oberwolfach problem
15:00 - 15:30 Brett Stevens (Carleton), Classification and enumeration of single change covering designs
15:30 - 16:00 Masoomeh Akbari (Ottawa), The Generalized Honeymoon Oberwolfach Problem with variable small cycle lengths
16:00 - 16:30 Don Kreher (Michigan Tech), Divisible and transverse Bussey systems
16:30 - 17:00 Jehyun Lee (Michigan Tech), Uniformly resolvable decompositions of $K_v-I$ into $5$-stars
17:00 - 17:30 Melissa Keranen (Michigan Tech), Decomposition of complete graphs into disconnected unicyclic graphs with six edges
Sunday December 3  (Soprano C)
8:30 - 9:00 Lucia Moura (Ottawa), Cover-free families on hypergraphs
9:00 - 9:30 Shuxing Li (Delaware), Balanced Splittable Hadamard Matrices: Constraints and Constructions
9:30 - 10:00 Caleb Jones (MUN), Burning Steiner Triple Systems
10:00 - 10:30 Peter Danziger (TMU), Colouring Kirkman triple systems
15:00 - 15:30 Andrea Burgess (UNB), Equitable colourings of cycle systems
15:30 - 16:00 Kate Nimegeers (Victoria), Pseudoku: A Sudoku Adjacency Algebra and Fractional Completion Threshold
16:00 - 16:30 Doug Stinson (Waterloo), Circular external difference families, graceful labellings and cyclotomy
16:30 - 17:00 Amin Bahmanian (Illinois State), Toward a Three-dimensional Counterpart of Cruse's Theorem
17:00 - 17:30 Amanda Chafee (Carleton), Conditions for a Block Intersection Graph (BIG) of Packings and Coverings to be Hamiltonian \& their Relationship to DCCD
Commutative Algebra
Org: Sankhaneel Bisui (Arizona State University), Thai Thanh Nguyen (McMaster University) and Adam Van Tuyl (McMaster University)
Saturday December 2  (Maestro)
8:00 - 8:30 Arvind Kumar (New Mexico State University), Resurgence of Classical Varieties
8:30 - 9:00 Shah Roshan-Zamir (University of Nebraska-Lincoln), Interpolation in the Weighted Projective Space
9:00 - 9:30 Thiago de Holleben (Dalhousie University), Rees algebras and Lefschetz properties of squarefree monomial ideals
9:30 - 10:00 Michael Morrow (University of Kentucky), Syzygy Computations in OI-Modules
10:00 - 10:30 Susan Cooper (University of Manitoba), Resolutions \& Powers of Ideals
15:00 - 15:30 Hasan Mahmood (Dalhousie University), Mutation of Simplicial Complexes
15:30 - 16:00 Trung Chau (University of Utah), Barile-Macchia resolutions for monomial ideals
16:00 - 16:30 Elena Guardo (University of Catania), Expecting the unexpected: quantifying the persistence of unexpected hypersurfaces
16:30 - 17:00 Nasrin Altafi (Queen's University), The Weak Lefschetz property and the number of generators of equigenerated monomial ideals
17:00 - 17:30 Sergio Da Silva (Virginia State University), Cohen-Macaulay Toric Ideals of Graphs and Geometric Vertex Decomposition
17:30 - 18:00 Ritika Nair (University of Kansas), An Improved Terai-Yoshida Theorem
Sunday December 3  (Maestro)
8:30 - 9:00 Mike Cummings (McMaster University), A Gröbner basis for regular nilpotent Hessenberg Schubert cells
9:00 - 9:30 Kieran Bhaskara (McMaster University), Regularity and projective dimension of toric ideals of bipartite graphs
9:30 - 10:00 Iresha Madduwe (Dalhousie University), Reconstruction Conjecture on Homological Invariants of Cameron Walker Graphs
10:00 - 10:30 Peilin Li (University of British Columbia), Building Monomial Ideal with Fixed Betti Number
Computational and Geometric Spectral Theory
Org: Alexandre Girouard (Université Laval) and Nilima Nigam (Simon Fraser University)
The purpose of this session is to bring together researchers from various sub-elds of spectral geometry, including in particular computational methods. Topics welcome include spectral optimization, spectral asymptotics, the geometry of nodal lines and non-standard spectral problems. Spectral geometry is a rapidly evolving subject, which is very well represented in the Canadian mathematical community. Part of this session will play the role of a follow up to previous sessions that were held at CMS meetings in 2015 (Montreal), 2018 (Vancouver), and 2022 (St. John's).
Saturday December 2  (UQAM - PK-1620)
8:30 - 9:00 Graham Cox (Memorial University), Geometry and topology of spectral minimal partitions
9:00 - 9:30 Jade Brisson (Université de Neuchâtel), Tubes and Steklov eigenvalues in negatively curved manifolds
9:30 - 10:00 Craig Sutton (Dartmouth), Generic properties of eigenfunctions in the presence of torus actions
10:00 - 10:30 Hanna Kim (Illinois), Upper Bound on the Second Laplacian Eigenvalue on the Real Projective Space
15:00 - 15:30 Jeff Ovall (Portland State), Concerning the localization of eigenvectors for the magnetic Laplacian operator
15:30 - 16:00 Hanna Potgieter (SFU), Numerical approximation of the first p-Laplace eigenpair for large p values
16:00 - 16:30 Daniel Venn (SFU), Surface Partial Differential Equation Solvability and Eigenvalues with Symmetric Meshfree Methods
16:30 - 17:00 Evans Harrell (GIT), Upper and lower bounds for eigenvalue gaps for Schrödinger operators and quantum graphs
17:00 - 17:30 David Sher (De Paul), Bessel function zeroes and Polya's conjecture
Sunday December 3  (UQAM - PK-1620)
8:30 - 9:00 Maxime Fortier Bourque (UDM), Two counterexamples to a conjecture of Colin de Verdière
9:00 - 9:30 Alain Didier Noutchegueme (UDM), Shape Optimisation for Steklov transmission eigenvalues on surfaces
9:30 - 10:00 Dima Jakobson (McGill), Nodal sets and negative eigenvalues in conformal geometry
10:00 - 10:30 Frédéric Rochon (UQAM), Torsion on some fibered cusp manifolds
15:00 - 15:30 Vukašin Stojisavljević (Université de Montréal), Nodal topology and persistence barcodes
15:30 - 16:00 Denis Vinokurov (Université de Montréal), The first eigenvalue of the Laplacian on orientable surfaces
16:00 - 16:30 John Toth (McGill), Goodness estimates in microlocally allowable regions
Current Trends in Matrices, Graphs and Computing
Org: Shaun Fallat, Seyed Ahmad Mojallal and Sandra Zilles (University of Regina)
Research on topics involving graphs and matrices is very well established and impacts the areas of algebraic and spectral graph theory, combinatorial analysis in matrix theory, as well as numerous application areas that extend into applied mathematics, physics, and computer science. Specific recent advances and directions include: inverse eigenvalue problem for graphs; quantum state transfer in graphs, algebraic properties of discrete networks; and applications within the realm of artificial intelligence, including certain aspects of machine learning. Computations associated with many interesting aspects involving both graphs and matrices have become increasingly vital for future studies at this confluence. The purpose of this session is to gather researchers, both experienced and junior, with expertise in any of these topics to present accounts of their contemporary research, and provide interested participants with proposed trends and concrete problems for future analysis in all of these important and popular research areas.
Saturday December 2  (Soprano B)
8:30 - 9:00 Chris Godsil (University of Waterloo), Periodicity of Oriented Cayley Graphs
9:00 - 9:30 Michael Tait (Villinova), The largest eigenvalue of the normalized distance Laplacian matrix
9:30 - 10:00 David Kribs (University of Guelph), Chordal Graphs and Distinguishability of Quantum States
10:00 - 10:30 Ada Chan (York University), Quantum isomorphism and Hadamard graphs
15:00 - 15:30 Hermie Monterde (University of Manitoba), Quantum walks on join graphs
15:30 - 16:00 William Martin (WPI), Four-class $Q$-bipartite association schemes
16:00 - 16:30 Anthony Bonato (Toronto Metropolitan University), How to cool a graph
16:30 - 17:00 Farnam Mansouri (University of Waterloo), What Forms of Collusion Can Be Avoided in Sample-Efficient Machine Teaching?
17:00 - 17:30 Hamed Hatami (McGill University), Littlestone dimension and online learnability of partial matrices
17:30 - 18:00 Kamyar Khodamoradi (University of Regina), Scatter Dimension and FPT Approximation Algorithms for Clustering
Sunday December 3  (Soprano B)
8:00 - 8:30 Todd Mullen (University of Prince Edward Island), Pay it Backward
8:30 - 9:00 Jeremie Turcotte (McGill University), On an induced version of Menger's theorem
9:00 - 9:30 Joy Morris (University of Lethbridge), Can we detect (Di)Graphical Regular Representations easily?
9:30 - 10:00 Nathan Johnston (Mount Allison University), Laplacian $\{-1,0,1\}$- and $\{-1,1\}$-diagonalizable graphs
10:00 - 10:30 Ahmad Mojallal (University of Regina), Forts, (fractional) zero forcing, and Cartesian products of graphs
15:00 - 15:30 Gena Hahn (Université de Montréal), Siblings, twins and self-embedded graphs
15:30 - 16:00 Manuel Lafond (Universite de Sherbrooke), Parameterized Graph Algorithms using Restricted Modular Partitions
16:00 - 16:30 Mahsa N. Shirazi (University of Manitoba), Uniform hypergraphs and balanced incomplete block designs with r-friendship property
16:30 - 17:00 Shivaram Pragada (Simon Fraser University), Subdivision and Adjacency spectra of Graphs
17:00 - 17:30 Bojan Mohar (Simon Fraser University), Extremal trees for eigenvalue combinations
17:30 - 18:00 Ben Seamone (Dawson College), Defective acyclic colourings of planar graphs
Descriptive Set Theory
Org: Marcin Sabok (McGill University) and Assaf Shani (Concordia University)
Descriptive set theory is concerned with the study of definable sets in Polish spaces. The techniques and results of the field found numerous applications and current research in descriptive set theory is intimately connected with many fields of mathematics, including mathematical logic, combinatorics, dynamical systems, topology, and geometric group theory.
Saturday December 2  (Symphonie 1)
15:00 - 15:30 Sumun Iyer (Cornell University), Generic homeomorphisms of Knaster continua
15:30 - 16:00 Chris Karpinski (McGill University), Hyperfiniteness of boundary actions of groups
16:00 - 16:30 Koichi Oyakawa (Vanderbilt University), Hyperfiniteness of boundary actions of acylindrically hyperbolic groups
16:30 - 17:00 Jenna Zomback (University of Maryland), Boundary actions of free semigroups
17:00 - 17:30 Spencer Unger (University of Toronto), Circle squaring with algebraic irrational translations
17:30 - 18:00 Forte Shinko (UC Berkeley), Equivalence relations classifiable by Polish abelian groups
Sunday December 3  (Symphonie 1)
9:00 - 9:30 Iian Smythe (University of Winnipeg), A descriptive approach to manifold classification
9:30 - 10:00 Antoine Poulin (McGill University), Space of Archimedean Left-Orders
10:00 - 10:30 Rachael Alvir (University of Waterloo), Scott Complexity
Functional Analytic tools for Financial Decision Making
Org: Mario Ghoussoub and David Saunders (University of Waterloo)
This session will feature approximately 8 speakers addressing applications of functional analysis to problems in decision making motivated by the finance and insurance industries. Topics include, but are not limited to, optimal reinsurance, decision making under ambiguity, robust risk measurement, and dependence structure ambiguity.
Saturday December 2  (UQAM PK-5115)
9:00 - 9:30 Luka Milic (Toronto Metropolitan University), Investment Strategies in the Face of Climate Uncertainty: Balancing Transition and Physical Risks
9:30 - 10:00 Matt Davison (Western University), Data Science Insights and financial models about the Financial Behaviour of Canadians
10:00 - 10:30 Samuel Solgon Santos (University of Waterloo), Inducing comonotonic additive risk measures from acceptance sets
15:00 - 15:30 Geneviève Gauthier (HEC Montréal), Joint dynamics for the underlying asset and its implied volatility surface: A new methodology for option risk management
15:30 - 16:00 Tony Ware (University of Calgary), Operator splitting and optimal control of gas storage
16:00 - 16:30 Jonathan Li (University of Ottawa), On Generalization and Regularization via Wasserstein Distributionally Robust Optimization
16:30 - 17:00 Marlon Moresco (Concordia University), Uncertainty Propagation and Dynamic Robust Risk Measures
Geometric Analysis
Org: Siyuan Lu (McMaster University) and Xiangwen Zhang (University of California, Irvine)
Saturday December 2  (Symphonie 4A)
8:00 - 8:40 Min Chen (McGill University), Alexandrov-Fenchel type inequalities for hypersurfaces in the sphere
8:50 - 9:30 Sebastien Picard (University of British Columbia), Strominger system and complex geometry
9:40 - 10:20 Chao-Ming Lin (Ohio State University), On the solvability of general inverse $\sigma_k$ equations
15:00 - 15:40 Robert Haslhofer (University of Toronto), Free boundary minimal disks in convex balls
15:50 - 16:30 Ling Xiao (University of Connecticut), Generalized Minkowski inequality via degenerate Hessian equations on exterior domains
16:40 - 17:20 Zihui Zhao (Johns Hopkins University), Unique continuation and the singular set of harmonic functions
Sunday December 3  (Symphonie 4A)
8:00 - 8:40 Tristan Collins (University of Toronto), Uniqueness of Cylindrical Tangent Cones to some Special Lagrangians
8:50 - 9:30 Edward Chernysh (McGill University), A Struwe-Type Decomposition for Weighted $p$-Laplace equations of the Caffarelli-Kohn-Nirenberg Type
9:40 - 10:20 Fang Hong (McGill University), Sharpened Minkowski Inequality in Cartan-Hadamard Spaces
Geometric Functional Analysis: Analytic, Discrete, and Probabilistic Aspects
Org: Serhii Myroshnychenko (University of the Fraser Valley), Michael Roysdon (Case Western Reserve University), Beatrice-Helen Vritsiou (University of Alberta) and Deping Ye (Memorial)
Geometric Functional Analysis deals with questions arising in the fields of Convex and Discrete Geometry, Probability and Information Theory, Harmonic and Functional Analysis, and even Algebraic Geometry. The central ingredient which links all of the above is the study of the nature and properties of convex bodies in finite dimensional normed spaces and associated functional extensions that find real life applications in questions arising from Computer Science and Quantum Information, Medical Tomography, Economics, Data Science and Machine Learning. Methods employed in the field include, but are not limited to, the celebrated concentration of measure phenomena, Fourier analysis and integral transforms, optimal transport, calculus of variations, and Riemannian geometric approaches.

This field is relatively young and numerous problems and central concepts are accessible to mathematicians of various backgrounds and at different stages of their career. Simultaneously, Geometric Functional Analysis has many interesting long-standing open questions, among which are Bourgain’s slicing problem, the Kannan-Lov´asz-Simonovits conjecture, Mahler’s conjecture, the Kneser-Poulsen conjecture, and the log-Brunn-Minkowski conjecture to name a few.

The principal goal of this gathering will be to encourage synergies between experts and students coming from various fields of geometry, analysis, applied mathematics, and beyond, by promoting research in such problems and related ones, while helping to establish/expand a network of diverse collaborations.

Saturday December 2  (Grand Opera C)
8:00 - 8:30 Nguyen H. Lam (Memorial University, Canada), A new approach to weighted Hardy-Rellich inequalities
8:30 - 9:00 Zengle Zhang (Chongquing University of Arts and Sciences, China), The dual Orlicz-Minkowski problems for log-concave functions
9:00 - 9:30 Yiming Zhao (Syracuse University, USA), The Minkowski problem in Gaussian probability space
9:30 - 10:00 Chengjun Yue (Memorial University, Canada), Around Poisson-Bessel potentials of fractional $L^1$-Hardy-Sobolev spaces
10:00 - 10:30 Alexander Koldobsky (University of Missouri, USA), Comparison problems for the Radon transform
15:00 - 15:30 Ryan Gibara (U. Cincinatti, USA), Traces and extensions of Sobolev functions in metric measure spaces
15:30 - 16:00 Alexander Litvak (University of Alberta, Canada), On the minimum of Gaussian variables.
16:00 - 16:30 Rui Sun (University of Alberta, Canada), Measure of Axiality for Convex Figures
16:30 - 17:00 Kenneth Moore (University of British Columbia), Minimal reflective and folding symmetry of convex sets
17:00 - 17:30 Bartlomiej Zawalski (Kent State, USA), On star-convex bodies with rotationally invariant sections
17:30 - 18:00 Andrii Arman (University of Manitoba, Canada), On some covering problems related to Borsuk's conjecture
Sunday December 3  (Grand Opera C)
8:00 - 8:30 Gioacchino Antonelli (Courant Institute, USA), Nonnegative curvature and existence of isoperimetric sets
8:30 - 9:00 Almut Burchard (University of Toronto), On pointwise (non)-monotonicity of heat kernels for metrics on the two-sphere
9:00 - 9:30 Brayden Letwin (University of Alberta, Canada), On a generalization of Grünbaum's inequality
9:30 - 10:00 Eli Putterman (TAU, Israel), Small-ball probabilities for mean widths of random polytopes
10:00 - 10:30 Julian Haddad (University of Sevilla, Spain), Fiber symmetrization and the Rogers-Brascamp-Lieb-Luttinger inequality
15:00 - 15:30 Mokshay Madiman (University of Delaware, USA), Submodularity questions in convex geometry
15:30 - 16:00 Dylan Langharst (Institut Math Jessieu, France), On the measures satisfying a monotonicity of the surface area with respect to Minkowski sum
16:00 - 16:30 Dmitry Faifman (Tel Aviv University, Israel), Some Whitney extension problems in valuation theory
16:30 - 17:00 Zhen Shuang (Memorial University), Fractional p-Laplacian and Signal Decomposition
17:00 - 17:30 Joshua Flynn (Mcgill University, Canada), The Isoperimetric Problem and Related Mean Curvature Type Flows
Geometric Partial Differential Equations
Org: Tristan Collins (MIT) and Robert Haslhofer (University of Toronto)
The focus of this session is on recent advances in geometric PDEs. This includes in particular recent breakthroughs in the study of minimal surfaces, Ricci curvature and geometric flows. The purpose is to expose junior mathematicians to these exciting recent developments in geometry and PDE, and to bring together researchers working on related topics to trigger collaborations.
Saturday December 2  (Symphonie 2A)
9:00 - 9:30 Marcin Sroka (CRM), On the conjecture of Alesker-Verbitsky
9:30 - 10:00 Bin Guo (Rutgers), Geometric estimates in Kähler geometry
10:00 - 10:30 Freid Tong (Harvard), On a free boundary Monge-Ampere equation and complete Calabi-Yau metrics
15:00 - 15:30 Shih-Kai Chiu (Vanderbilt), Special Lagrangian spheres in adiabatic limits
15:30 - 16:00 Spiro Karigiannis (University of Waterloo), A special class of p-harmonic maps inducing calibrated fibrations
16:00 - 16:30 Xinrui Zhao (MIT), Unique continuation problem on RCD spaces
17:00 - 17:30 Nicholas McCleerey (Purdue), Singularities of m-subharmonic Functions
17:30 - 18:00 Siyuan Lu (McMaster University), Curvature estimates for semi-convex solutions of Hessian equations
Sunday December 3  (Symphonie 2A)
9:00 - 9:30 Bruno Staffa (University of Toronto), Generic density of geodesic nets
10:00 - 10:30 Tristan Ozuch (MIT), Selfduality along Ricci flow and instabilities of Einstein metrics
Schedule to be determined
Paula Burkhardt-Guim (NYU), ADM mass for $C^0$ metrics and distortion under Ricci-DeTurck flow, Symphonie 2A
Geometry in Calculus of Variations and PDEs
Org: Lia Bronsard and Dominik Stantejsky (McMaster University)
Geometric analysis and calculus of variations has been of great mutual influence that persists until nowadays. Both areas are closely linked to partial differential equations for example via Euler-Lagrange equations or the Noether theorem. Furthermore, they share a large set of common tools and interests that will be presented in this session including the investigation of existence/uniqueness, regularity theory or techniques such as Γ-convergence. Often the considered functionals and equations have a physical interpretation which leads to a large domain of applications, for instance in physics, material science, mechanics and engineering, biology and many more. In order to facilitate the spirited exchange of ideas we plan to invite speakers also from outside Canada. Our choice of speakers reflects the diversity being present in the global mathematical community to promote cross-cultural collaboration.
Saturday December 2  (Symphonie 7)
8:30 - 9:00 Tiziana Giorgi (University of Alabama), SmA-type phases of bent-core liquid crystals
9:00 - 9:30 Dominik Stantejsky (McMaster University), On Minimizing Harmonic Maps with Planar Boundary Anchoring
9:30 - 10:00 Kennedy Idu (University of Toronto), On the Alexandrov's estimate
10:00 - 10:30 Diane Guignard (University of Ottawa), Finite Element Methods for the Stretching and Bending of Thin Structures with Folding
Sunday December 3  (Symphonie 7)
8:30 - 9:00 Xin Yang Lu (Lakehead University), A physicality-enforcing convex singular potential
9:00 - 9:30 Lorena Aguirre Salazar (Lakehead University), On a relationship between the TFDW and the Liquid Drop models via Gamma convergence
9:30 - 10:00 Jack Tisdell (McGill University), Minimizing asymptotic score in random bullseye darts for i.i.d. throws
10:00 - 10:30 Ihsan Topaloglu (Virginia Commonwealth University), Minimizing sets of weakly-repulsive nonlocal energies
Harmonic Analysis & PDE
Org: Ryan Gibara (University of Cincinnati) and Scott Rodney (Cape Breton University)
This session will bring together researchers, both junior and senior, who specialize in various subfields of harmonic analysis and the analysis of PDEs. Problems related to a wide range of topics such as Muckenhoupt weights, variable-exponent settings, singular integrals, Bellman functions, rearrangements, potential theory on metric measure spaces, and more, will be considered. The mix of specialties of the intended participants/audience will foster the fruitful exchange of ideas and possible cross-field collaborations.
Saturday December 2  (Ovation)
8:30 - 9:00 Paul Gauthier (Université de Montréal), Radial limits of solutions to elliptic partial differential equations
9:00 - 9:30 Damir Kinzebulatov (Université Laval), An Orlicz space dictated by drifts singularities
9:30 - 10:00 Javad Mashreghi (Université Laval), A Banach--Steinhaus type theorem
10:00 - 10:30 Cristian Rios (University of Calgary), The Moser method for infinitely degenerate equations
15:00 - 15:30 Aleksander Danielski (Concordia University), Complex Analytic Structure of Stationary Solutions of the Euler Equations
15:30 - 16:00 Kirill Golubnichiy (University of Calgary), Inverse Problem for the Black-Scholes Equation solution.
16:00 - 16:30 Giangvuthanh Nguyen (Old Dominion University), Asymptotic expansion of a singular potential near the nematic-isotropic phase transition point in the Landau-de Gennes theory
17:00 - 17:30 Maria Ntekoume (Concordia University), Critical well-posedness for the derivative nonlinear Schr\"odinger equation on the line
17:30 - 18:00 Cody Stockdale (Clemson University), On the $T1$ theorem for compactness of Calderón-Zygmund operators
Sunday December 3  (Ovation)
9:00 - 9:30 Mahishanka Withanachchi (Université Laval), Polynomial Approximation in Local Dirichlet Spaces
9:30 - 10:00 Junjie Zhu (University of British Columbia), Cones are not Salem
10:00 - 10:30 Leonid Slavin (University of Cincinnati), Monotone rearrangement and Bellman functions for VMO with generalized Campanato norm
15:30 - 16:30 Eric Sawyer (McMaster University), A Proof of the Fourier Restriction Conjecture
16:00 - 16:30 Ignacio Uriarte-Tuero (University of Toronto), Some remarks on Muckenhoupt Ap weights
16:30 - 17:00 Michael Penrod (University of Alabama), Convolution Operators on Matrix Weighted Variable Lebesgue Spaces
17:00 - 17:30 Cintia Pacchiano (University of Calgary), Regularity Results for Double Phase Problems on Metric Measure Spaces
17:30 - 18:00 Josh Kline (University of Cincinnati), On regularity of sets of finite fractional perimeter in metric measure spaces
Homotopy Theory
Org: Martin Frankland (University of Regina) and Chris Kapulkin (Western University)
"Historically a branch of algebraic topology, homotopy theory is now its own discipline with deep connections to other areas, including algebraic geometry, number theory, geometric topology, category theory, and theoretical computer science, among others. In this special session, we want to bring together researchers working on different aspects of the field: from connections to other disciplines mentioned above, to new results and computations within algebraic topology, to entirely new areas of mathematics inspired by homotopy theory. In addition, we intend this session to be primarily a venue for early career researchers, postdocs, and graduate students to present their results, although we will also invite more senior researchers.

Given the breadth of the field, we will ask all our invitees to prepare talks understandable to all members of the audience, including students and researchers outside of the specialization of the speaker. In particular, talks will clearly present the motivation behind the results. As such, we view this session as being inviting to students and accessible to mathematicians in other fields. We hope that emphasizing understandable talks will help initiate interactions between people working on different aspects of the field, leading to new collaborations. "

Saturday December 2  (Symphonie 3A)
8:00 - 8:30 Peter Bubenik (University of Florida), Homotopy and persistent homology using closure spaces
8:30 - 9:00 John Miller (Université de Montréal), Persistence and Triangulated Categories
9:00 - 9:30 Udit Mavinkurve (University of Western Ontario), The Fundamental Group(oid) in Discrete Homotopy Theory
9:30 - 10:00 Rachel Hardeman Morrill (University of Calgary), Path Categories and Graphs
10:00 - 10:30 Toni Annala (Institute for Advanced Study, Princeton), Topologically protected tricolorings
15:00 - 15:30 Simon Henry (University of Ottawa), Simplicial completion of model categories and strictification
15:30 - 16:00 Daniel Carranza (Johns Hopkins University), Calculus of fractions for quasicategories
16:00 - 16:30 Sterling Ebel (University of Western Ontario), Synthetic approach to the Quillen model structure on spaces
16:30 - 17:00 Carlos Gabriel Valenzuela (University of Regina), Double cohomology and sphere triangulations
17:00 - 17:30 Sacha Ikonicoff (University of Ottawa), Quillen-Barr-Beck cohomology of divided power algebras over an operad
17:30 - 18:00 Brandon Doherty (Florida State University), Cubical Joyal model structures: recent and ongoing developments
Sunday December 3  (Symphonie 3A)
8:00 - 8:30 Ben Williams (University of British Columbia), Looking for extraordinary involutions
8:30 - 9:00 Arnab Kundu (University of Toronto), Gersten's injectivity in the non-Noetherian world
9:00 - 9:30 Elden Elmanto (University of Toronto), L-functions and algebraic K-theory
9:30 - 10:00 Kristine Bauer (University of Calgary), Faa di Bruno for bicategories
10:00 - 10:30 Dorette Pronk (Dalhousie University), Double Category Sites for Grothendieck Topoi
15:00 - 15:30 Nick Rozenblyum (University of Toronto), Stratifications and reflection
15:30 - 16:00 Tseleung Larry So (University of Western Ontario), The cohomology of 4-dimensional toric orbifolds
16:00 - 16:30 Jerry Wei (University of Toronto), Analogies of Lie Group Concepts in \( S^7 \) and the Space of Commuting Pairs
16:30 - 17:00 Don Stanley (University of Regina), Which graded algebras are the cohomology of a space?
Mathematical, statistical, and AI modelling of Mpox and related diseases.
Org: Nasri Bouchra (Université de Montréal) and Woldegerima Assefa Woldegebriel (York University)
Increased interactions between humans and animals present ideal environments for the (re)emergence and transmission of zoonotic origin pathogens, such as mpox. Sexual contact has been hypothesized as the primary transmission route for the disease in the recent outbreak, with the community of Gay, bisexual, and men having sex with men (gbMSM) disproportionately affected. Initially, mpox was predominantly zoonotic, with an animal-to-human transmission, throughout the last decades, however, human-to-human transmission has become more sustained in recent years. The recent 2022 mpox outbreak, has unusual epidemiological and clinical features compared with previous outbreaks. This clearly indicates that the world needs to pay more attention to this disease and other zoonotic threats. Disease modelling approaches using mathematical, statistical, and AI have played a central role during epidemics and pandemics, providing a cost-effective way of assessing disease transmission as well as targets for preventing disease and control. This session will bring together researchers working on mathematical, statistical, and machine learning modelling and Prediction of epidemiological dynamics and other socioeconomic, and behavioural factors related to mpox or other related infectious diseases. This session will also serve as a platform for junior and senior researchers to exchange new ideas and initiate potential collaborations.
Sunday December 3  (UQAM - PK-3205)
8:30 - 9:00 Bouchra Nasri (Université de Montréal), Mathematical modeling of mpox: a scoping review
9:00 - 9:30 Iain Moyles (York), Bifurcations in fear behaviour impact final-size in a disease epidemic
9:30 - 10:00 Jhoana P. Romero-Leiton (University of Manitoba), Mathematical modelling of the first HIV/ZIKV co-infection cases in Colombia and Brazil
10:00 - 10:30 Woldegebriel Assefa Woldegerima (York), Quantifying the Basic Reproduction Number and the Underestimated Fraction of Mpox Cases: Mathematical Modelling and ML Study
15:00 - 15:30 Jacques Bélair (Université de Montréal), Modeling Variable Compliance to Recommended Interventions to Control Outbreaks
15:30 - 16:00 Qing Han (York), Adaptive changes in sexual behavior in the high-risk population in response to monkeypox transmission can control the outbreak
16:00 - 16:30 Jude Kong (York), An AI-powered, integrated and user-friendly early warning, alert and response platform for disease outbreaks
16:30 - 17:00 Idriss Sekkak (Université de Montréal), An analysis of a Multigroup mpox epidemic model incorporating public health measures
Mathematics in the Public Sector
Org: Megan Dewar (Tutte Institute for Mathematics and Computing) and Kseniya Garaschuk (Canadian Centre for Cyber Security)
In this session, we will highlight the mathematical research that is performed in Canadian government organizations and the public sector. The presentations will showcase techniques in cryptography, cybersecurity, data science, mathematical modelling, and numerical analysis from both a practical and theoretical perspective. The speakers will represent a variety of public sector institutions, including Statistics Canada, the Bank of Canada, the National Research Council Canada, the Department of National Defence, and Communications Security Establishment.
Saturday December 2  (UQAM - PK-6605)
8:30 - 9:00 Benoit Hamelin (Tutte Institute for Mathematics and Computing), Telemetry representation and interactive labeling to facilitate cyber defense
9:00 - 9:30 Sichun Wang (Defence Research and Development Canada), Miscellaneous Applications of Mathematics and Statistics in Statistical Signal Processing and White-Box Cryptography
9:30 - 10:00 Masoud M Nasari (Bank of Canada), Disaggregating low-frequency economic measures
10:00 - 10:30 Question and Answer Period
15:00 - 15:30 Koray Karabina (National Research Council Canada), Cryptography Meets Topological Data Analysis
15:30 - 16:00 Mark Rempel (Defence Research and Development Canada), Practical applications of reinforcement learning for decision support in defence and security
16:00 - 16:30 Valérie Poulin (Tutte Institute for Mathematics and Computing/Applied Research at Communications Security Establishment), Hypergraph exploration via vectorization
16:30 - 17:00 Benjamin Santos (Statistics Canada), Multi-Party Privacy Preserving Record Linkage based on Circuit Private Set Intersection
17:00 - 17:30 Question and Answer Period
Mathematics of Machine Learning
Org: Ben Adcock (SFU), Jason Bramburger (Concordia), Giang Tran (Waterloo) and Hamid Usefi (Memorial)
Machine learning is having a profound impact on many different sectors including scientific research, industry, and policymaking. Yet, its mathematical foundations are still far from being well understood. While techniques such as deep learning have produced outstanding success on a wide range of real-world applications, it is increasingly well known that such methods may exhibit unpredictable performance or instabilities, and generally lack interpretability. Moreover, although stochastic optimization algorithms are ubiquitous in machine learning, their convergence properties are still not fully understood in the nonconvex framework. These and other gaps between theory and practice raise the pressing need for a broader, more comprehensive mathematical foundations for machine learning. This session will mark the fifth in a series of sessions at CMS meetings on this theme. Topics include (but are not limited to): deep learning, explainability and interpretability of deep neural networks, natural language processing, feature selection and dimensionality reduction, classification and regression, optimization methods for machine learning. Its aim is to bring together a diverse group of leading experts in mathematics of machine learning. The proposed session will be a forum for discussing and exploring emerging ideas in this fast-growing and exciting field.
Saturday December 2  (Soprano A)
9:00 - 9:30 Simone Brugiapaglia (Concordia University), Generalization limits of deep neural networks in identity effects learning
9:30 - 10:00 Adam Gardner (Artinus Consulting), Decoding Neural Scaling Laws
10:00 - 10:30 Serge Prudhomme (Polytechnique Montreal), Reduced-order modeling for the wave equation using Green's functions and neural networks
15:00 - 15:30 Mark Iwen (Michigan State University), Sparse Spectral Methods for Solving High-Dimensional and Multiscale Elliptic PDEs
15:30 - 16:00 Wenjing Liao (Georgia Institute of Technology), Exploiting low-dimensional structures in machine learning and PDE simulations
16:00 - 16:30 Luana Ruiz (Johns Hopkins University), Machine Learning on Large-Scale Graphs
16:30 - 17:00 Christoph Ortner (University of British Columbia), Efficient Parameterization of Many-body Interaction
17:00 - 17:30 Ziad Aldirany (Polytechnique Montreal), Multi-Level Approach for Error Reduction in Physics-Informed Neural Networks
17:30 - 18:00 Philippe-André Luneau (Université Laval), Conservative Surrogate Models for Optimization with the Active Subspace Method
Sunday December 3  (Soprano A)
9:00 - 9:30 Elina Robeva (University of British Columbia), Learning Causal Models via Algebraic Constraints
9:30 - 10:00 Elizabeth Collins-Woodfin (McGill), High dimensional limit of streaming SGD for generalized linear models
10:00 - 10:30 Matthew Scott (University of British Columbia), When are generative models suitable for signal recovery from subsampled Fourier measurements?
Models, Methods, and Solutions: New Developments in Nonlinear Partial Differential Equations and Stochastic Differential Equations
Org: Stephen Anco (Brock University), Damir Kinzebulatov (Université Laval) and Alexey Shevyakov (University of Saskatchewan)
The session will bring together researchers working on modern analytic methods for nonlinear partial differential equations (PDE) and stochastic differential equations (SDE), with the purpose of mutual enrichment of the areas through the exchange of expertise, methods, and applications, and fostering new collaborations. The session will include talks devoted to exact and approximate solutions, equation structure, relations between stochastic and deterministic continuum equations, and mathematical modeling with PDEs and SDEs.
Saturday December 2  (UQAM - PK-2605)
8:00 - 8:30 Ryan Thiessen (Alberta), Travelling Wave Solutions in a Novel Glioma Invasion Model.
8:30 - 9:00 Alan Lindsay (Notre Dame), Inferring the source of diffusive sources through extreme statistics.
9:00 - 9:30 Raphael Madou (McGill), Strong solutions on SDEs with singular (form-bounded) drifts via Rockner-Zhao approach.
9:30 - 10:00 Greg Lewis (UOIT), Numerical continuation for sheared annular electroconvection
10:00 - 10:30 Theodore Kolokolnikov (Dalhousie), Recurrent and chaotic outbreaks in SIR model
15:00 - 15:30 Alex Chernyavsky (Buffalo), Whitham modulation theory for the Zakharov-Kuznetsov equation and stability analysis of its periodic traveling wave solutions
16:00 - 16:30 Thomas Wolf (Brock), Radial compressible fluid flow in $n>1$ dimensions and their conserved integrals, invariants, symmetries and Casimirs
16:30 - 17:00 Stephen Anco (Brock), Exact solitary wave solutions for a coupled gKdV-NLS system
17:00 - 17:30 Alexey Shevyakov (Saskatchewan), New exact plasma equilibria with axial and helical symmetry
Sunday December 3  (UQAM - PK-2605)
8:30 - 9:00 Wei Sun (Concordia), Periodic solutions of some SDEs and SPDEs
9:00 - 9:30 Yana Nec (Thompson Rivers), Weak solutions to diffusion equation with piecewise constant diffusivity
9:30 - 10:00 Adilbek Kairzhan (Toronto), A Hamiltonian Dysthe equation for deep-water gravity waves with constant vorticity
10:00 - 10:30 Xiaowen Zhou (Concordia), Speed of explosion for continuous-state branching processes with nonlinear branching mechanism
15:00 - 15:30 Reihaneh Vafadar (Laval), Weak well-posedness of SDEs with divergence-free drifts
15:30 - 16:00 Maria Ntekoume (Concordia), Symplectic non-squeezing for integrable PDEs: the KdV equation on the line
Number Theory by early career researchers
Org: Payman Eskandari (University of Winnipeg) and Samprit Ghosh (University of Calgary)
This session aims to give a platform to graduating PhD students, recently graduated PhD holders and postdocs to showcase their research in the field of Number Theory. We hope that this will be a great opportunity to exchange ideas, network and gain exposure. We plan to consider all contributions in algebraic and analytic number theory, as well as arithmetic geometry.
Saturday December 2  (Grand Salon Opera B)
8:00 - 8:30 Erman Isik (University of Ottawa), Modular approach to Diophantine equation $x^p+y^p=z^3$ over some number fields
8:30 - 9:00 Jonathan Love (McGill University), On isospectral quaternion orders
9:00 - 9:30 Kübra Benli (University of Lethbridge), Discrete moments of the derivatives of the Riemann zeta function
9:30 - 10:00 Ertan Elma (University of Lethbridge), Number of Prime Factors with a Given Multiplicity
10:00 - 10:30 Mihir Deo (University of Ottawa), Signed $p$-adic $L$-functions of Bianchi modular forms
15:00 - 15:30 Sedanur Albayrak (University of Calgary), Quantitative estimates for the size of an intersection of sparse automatic sets
15:30 - 16:00 Gregory Knapp (University of Calgary), Polynomial Root Separation and Mahler Measure
16:00 - 16:30 Samprit Ghosh (University of Calgary), Minimal Subfields of Elliptic curves
16:30 - 17:00 Félix Baril.Boudreau (University of Lethbridge), Value-Distribution of Logarithmic Derivatives of Real Quadratic Dirichlet L-functions over the Projective Line
17:00 - 17:30 Subham Roy (Université de Montréal), Areal Mahler measure of multivariable polynomials
17:30 - 18:00 Isabella Negrini (University of Toronto), A Shintani map for rigid cocycles
Sunday December 3  (Grand Salon Opera B)
8:00 - 8:30 Xiao Zhong (University of Waterloo), Preimages Question for Surjective Endomorphisms on $(\mathbb{P}^1)^n$
8:30 - 9:00 David Nguyen (Queens University), Shifted convolutions and applications
9:00 - 9:30 Soheil Memariansorkhabi (University of Toronto), Growth Rate of Rational Points on Non-Compact Complex Ball Quotients
9:30 - 10:00 Mishty Ray (University of Calgary), Introduction to geometry of local Arthur packets
10:00 - 10:30 Chi Hoi (Kyle) Yip (Kyle) Yip (University of British Columbia), Additive decompositions of multiplicative subgroups
15:00 - 15:30 Mathilde Gerbelli-Gauthier (McGill University), An average Sato-Tate for non-tempered representations.
15:30 - 16:00 Erik Holmes (University of Toronto), Shapes and asymptotics in number theory
16:00 - 16:30 Marti Roset Julià (McGill University), The Gross--Kohnen--Zagier theorem via p-adic uniformization
16:30 - 17:00 Mohammadreza Mohajer (University of Ottawa), P-adic periods and p-adic subgroup theorem for 1-motives
17:00 - 17:30 Abhishek Bharadwaj (Queen's University), On primitivity and vanishing of Dirichlet series
17:30 - 18:00 Oussama Hamza (University of Western Ontario), On extensions of number fields with given quadratic algebras and cohomology
Recent Progress in Statistical Mechanics
Org: Vojkan Jakšić (McGill) and Renaud Raquépas (New York University)
This goal of this session is to invite North-American experts in mathematical physics, both classical and quantum, to share recent results, works in progress and open problems on fundamental questions in the field, with an emphasis on out-of-equilibrium phenomena.
Saturday December 2  (Symphonie 3B)
8:30 - 9:00 Benjamin Landon (University of Toronto), Tail estimates for stationary KPZ models
9:00 - 9:30 Nicholas Barnfield (McGill University), On the Ziv-Merhav theorem beyond Markovianity
9:30 - 10:00 Raphaël Grondin (McGill University), A different approach to the Ziv-Merhav Theorem
10:00 - 10:30 Gilles Parez (Université de Montréal), The range of entanglement
15:00 - 15:30 Alexander Fribergh (Université de Montréal), Biased random walks on supercritical percolation clusters
15:30 - 16:00 Elias Hess-Childs (New York University), Propagation of chaos from the perspective of perturbation theory
16:00 - 16:30 Lia Bronsard (McMaster University), Boundary defects in liquid crystals/ Défauts aux limites dans les cristaux liquides
16:30 - 17:00 Israel Michael Sigal (University of Toronto), Some Rigorous Results on Propagation of Quantum Information
17:00 - 17:30 Luc Vinet (Université de Montréal), Entanglement of free fermiom systems, signal processing and algebraic combinatorics
17:30 - 18:00 Jacob Shapiro (Princeton University), Classification of disordered insulators in 1D
Stochastic Control Theory and Applications
Org: Ali D. Kara (University of Michigan), Somnath Pradhan (Queen's University) and Serdar Yuksel (Queen’s University)
Stochastic control theory studies the control and optimization of dynamical systems under stochastic uncertainty. The uncertainty can be a part of the observation process and-or the evolution of the system itself. The processes are studied in continuous and discrete space/time settings. The theory may involve systems with a single agent under various information patterns, or decentralized systems with multiple agents under a variety of dynamical system models and information structures. The study of such controlled stochastic processes has grown around a very diverse mathematical theory building on optimal control, probability theory, PDE theory, dynamical systems, stochastic analysis, reinforcement learning etc. and has applications in engineering, computer science, statistics, finance, and operations research, among other areas. Stochastic control is a broad and highly active research area with various open problems and it brings different communities together. Hence, we aim to draw attention to recent progress in the field by organizing this session.
Saturday December 2  (UQAM - PK-1320)
8:00 - 8:30 Somnath Pradhan (Queen’s University), Existence and Discrete-Time Approximations of Optimal Controls for Controlled Diffusions under General Information Structures
8:30 - 9:00 Minyi Huang (Carleton University), Mean field social optimization: person-by-person optimality and master equations
9:00 - 9:30 Asaf Cohen (University of Michigan), Deep Neural Networks Methods for Mean Field Game Master Equation
9:30 - 10:00 Peter Caines (McGill University), Mean Field Games on Large Sparse and Dense Networks
10:00 - 10:30 Joe Jackson (University of Chicago), Sharp convergence rates for mean field control on the region of strong regularity
15:00 - 15:30 Sina Sanjari (University of Illinois / Royal Military College), Large Stochastic Exchangeable Teams, Their Mean-Field Limits, and Optimality of Symmetric Policies
15:30 - 16:00 Johannes Wiesel (Carnegie Mellon University), Martingale Schrödinger bridges
16:00 - 16:30 Zachary Selk (Queen’s University), Robustness for Near-Brownian Noise via Rough Paths Theory
16:30 - 17:00 Margaret Chapman (University of Toronto), Risk-Aware Control Theory
17:00 - 17:30 Dena Firoozi (University of Montreal), Risk-Sensitive Control and Mean Field Games: A Variational Approach
17:30 - 18:00 Borna Sayedana (McGill University), Relative Almost Sure Regret Bounds for Certainty Equivalence Control of Markov Jump Systems
Sunday December 3  (UQAM - PK-1320)
8:00 - 8:30 Yunus Emre Demirci (Queen's University), On Regularity and Ergodicity of Partially Observable Markov (Decision) Processes
8:30 - 9:00 Vijay Subramanian (University of Michigan), Bayesian Learning of Optimal Policies in Markov Decision Processes with Countably Infinite State-Space
9:00 - 9:30 Roland Malhame (University of Montreal), A bottom-up approach to the construction of socially optimal discrete choices under congestion
9:30 - 10:00 Ziteng Cheng (University of Toronto), Mean field regret in discrete time games
10:00 - 10:30 Bora Yongacoglu (University of Toronto), Connections between POMDPs and partially observed n-player mean-field games
Student Research Session
Org: Karen Julia Fletcher (Athabasca University) and Daniel Zackon (McGill University)
Sunday December 3  (Symphonie 2B)
15:00 - 15:30 Meraj Hosseini (Concordia), Contraction of Convex Hypersurfaces in $\mathbb R^3$ by Powers of Principal Curvatures
15:30 - 16:00 Adriana-Stefania Ciupeanu (Manitoba), Dynamics of Variants of Concern
16:00 - 16:30 Nahid Sadr (Sherbrooke), Index-mixed copulas
16:30 - 17:00 Shreya Dhar, Chenglu Wang, Grayson Plumpton & River Newman (Toronto, Pennsylvania, Queen's, Yale), On the Classification of Field Extensions of p-adic Fields
17:00 - 17:30 Scott Wesley (Dalhousie), Towards an Algebraic and Geometric Theory of Quantum Circuits
17:30 - 18:00 Alexander Kroitor (Waterloo), Asymptotics For Lattice Paths Through Analytic Combinatorics
Monday December 4  (Symphonie 2B)
8:00 - 8:30 Christopher James Lang (Waterloo), Spherically symmetric hyperbolic monopoles
8:30 - 9:00 Chaabane Rejeb (Sherbrooke), Quasi-homogeneous solutions to the WDVV equations associated with the genus one Hurwitz-Frobenius manifolds.
9:00 - 9:30 Fadia Ounissi (Concordia), On Rogers-Shephard type inequalities for (n-1)-dimensional volumes
9:30 - 10:00 Haggai Liu (SFU), Moduli Spaces of Weighted Stable Curves and their Fundamental Groups
10:00 - 10:30 Tonatiuh Matos Wiederhold (Toronto), The lattice of uniform topologies
Supporting Numeracy for Non-STEM Students
Org: Kseniya Garaschuk and Vanessa Radzimski (University of the Fraser Valley)
Numeracy is a complex notion encompassing many dimensions that contribute to students’ mathematical understanding. The methods employed to enhance numeracy learning in the classroom must align with the specific facets of numeracy being prioritized and nurtured. In this session, educators will share their insights on the specific dimensions of numeracy that significantly inform their practice. Presenters will address the ways in which they support the development of numeracy skills in their students from a variety of disciplines, including students that are pre-service and in-service teachers at the elementary and secondary levels. Join us as we explore strategies for supporting flexible, proficient, and contextual understandings of mathematics through numeracy. This session is supported by Callysto project.
Sunday December 3  (Grand Salon Opera A)
8:00 - 8:30 Networking Meet and Greet
8:30 - 9:00 Miroslav Lovric (McMaster), Why numeracy should have a life of its own
9:00 - 9:30 Nahid Walji (University of British Columbia), Mathematics and Numeracy for Liberal Arts Students
9:30 - 10:00 Asia Matthews, Combining Numeracy and Rhetoric in an Interdisciplinary Modelling Course
10:00 - 10:30 Anton Mosunov and Gavin Orok (University of Waterloo), Assessing the Effect of an Illustrated Storybook on Correcting Common Misconceptions About Mathematics
15:00 - 15:30 Ed Doolittle (First Nations University of Canada), Numeracy for Indigenous Teacher Candidates
15:30 - 16:00 Andrea Hyde (College of the Rockies), Numeracy in Pre-Ed Students in Rural BC
16:00 - 16:30 Viktor Freiman (University of Moncton), New Brunswick path to numeracy in technology-rich environments: what elementary school teachers should be aware of ?
16:30 - 17:00 Christine Suurtamm (University of Ottawa), Equity and Mathematics Teaching and Learning
17:00 - 17:30 Fok Shuen Leung (University of British Columbia), Poetry without Grammar
17:30 - 18:00 Open Discussion
The many facets of random matrix theory
Org: Lucas Benigni (Université de Montréal), Elizabeth Collins-Woodfin (McGill) and Elliot Paquette (McGill)
The goal of the meeting is to bring together researchers in random matrix theory, in its many different forms, to share different techniques, perspectives and stoke creativity in new problems and collaborations. We have intentionally selected for a wide range of topics: • Dyson Brownian motion and other Markov processes on random matrices and their application to universality. • Beta-ensembles, and their connection to log-correlated fields. • Connections of random matrix theory to spin glass theory and high-dimensional statistics. • The random matrix theory of random graphs and discrete random matrices. • Free probability, the theory of multiple random matrices, and the matrix Dyson equation.
Saturday December 2  (Imagination)
8:30 - 9:00 Vishesh Jain (University of Illinois at Chicag), Invertibility of random matrices
9:00 - 9:30 James Mingo (Queen’s University), Infinitesimal Operators
9:30 - 10:00 David Renfrew (Binghamton University), Eigenvalues of minors of random matrices and roots of derivatives of random polynomials
10:00 - 10:30 Aaron Smith (University of Ottawa), Kac's Walk on SO(n) and Related Chains
15:00 - 15:30 Giorgio Cipolloni (Princeton University), Logarithmically correlated fields in non-Hermitian random matrices
15:30 - 16:00 Benjamin Landon (University of Toronto), Regularity conditions in the CLT for random matrices
16:00 - 16:30 Andras Meszaros (University of Toronto), Eigenvectors of the square grid plus GUE
16:30 - 17:00 Luke Peilen (Temple University), Local Laws and Fluctuations for Log Gases
Sunday December 3  (Imagination)
8:30 - 9:00 Hugo Latourelle-Vigeant (McGill University), Matrix Dyson Equation for Correlated Linearizations
9:00 - 9:30 Justin Ko (University of Waterloo), Spectral Phase Transitions in Non-Linear Wigner Spiked Models
9:30 - 10:00 Jonathan Husson (University of Michigan), Generalized empirical covariance matrices and large deviations.
10:00 - 10:30 Vincent Painchaud (McGill University), Convergence of the stochastic Airy operator to the stochastic sine operator
Viv(r)e les mathématiques
Org: Michèle Couderette (IRL CRM-CNRS; UPEC-LDAR), Eva Knoll (UQAM), Valériane Passaro (UQAM) and Fabienne Venant (UQAM)
We are involved with mathematics on a daily basis in our work, but how do we live them? Our individual experience has some bearing on our practice and vice versa. In this session participants will experiment in order to explore this relationship and its possible consequences for the classroom.
Saturday December 2  (Grand Salon Opera A)
8:30 - 10:30 Eva Knoll (Université du Québec à Montréal), Viv(r)e les mathématiques
Wave Phenomena and Partial Differential Equations
Org: George Shaohua Chen (Cape Breton University), Ming Mei (McGill University & Champlain College St-Lambert) and Chunhua Ou (Memorial University)
This scientific session is aimed to bring together the leading experts as well as promising young researchers to present their recent results in wave phenomena for partial differential equations with applications in fluid dynamics and ecology. Key topics focus on the structure of traveling waves, shock waves, rarefaction waves, diffusion waves, and their asymptotic stability, etc. It also provides a premier interdisciplinary forum for senior and junior researchers to exchange their experiences in the study of partial differential equations. The talks will span from analysis through modeling and computation to applications of partial differential equations.
Saturday December 2  (UQAM - PK-7210)
8:00 - 8:30 Gantumur Tsogtgerel (McGill University), Elliptic estimates for operators with rough coefficients
8:30 - 9:00 Ming Mei (McGill University & Champlain College St-Lamberta), Threshold convergence results for nonlocal time-delayed diffusion equations
9:00 - 9:30 Xinwei Yu (University of Alberta), Some new regularity criterions for the 3D incompressible Navier-Stokes equations
9:30 - 10:00 Jose Palacios Armesto (University of Toronto), Asymptotic Stability of peakons for the Novikov equation
10:00 - 10:30 Gael Yomgne Diebou (University of Toronto), Non-blow up at large times and stability of global solutions to nematic liquid crystal flow
15:00 - 15:30 Elena Braverman (University of Calgary), Trimming harvesting strategies to natural dispersal for spatially heterogeneous populations
15:30 - 16:00 Yuanxi Yue (Memorial University of Newfoundland), Traveling wavefronts to a model of precursor and differentiated cells
16:00 - 16:30 Weiyang Li (Memorial University of Newfoundland), Liouville-type Laws for $-\Delta_m u+|\nabla u|^q=f(u)$ in Exterior Domains of $\mathbb R^N$
16:30 - 17:00 Holger Teismann (Acadia University), Dispersion as an obstruction to the bilinear control of Schrödinger equations
17:00 - 17:30 George Shaohua Chen (Cape Breton University), Improved blowup time estimate for fourth-order damped wave equation with strain term at arbitrary positive initial energy

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