Réunion d'hiver SMC 2014
Université McMaster, 5 - 8 décembre 2014
Prix David-Borwein de mathématicien émérite pour l'ensemble d'une carriére et conférence
- KENNETH R. DAVIDSON, University of Waterloo
Noncommutative dilation theory [PDF]
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Dilation theory of a single operator began in 1953 with Bela Sz.Nagy's result that
every operator on Hilbert space with norm at most 1 is the upper corner of a 2x2
lower triangular operator matrix which is an isometry. This led to a powerful functional
calculus for studying a single operator on Hilbert space. In 1968, William Arveson
set out a general theory for studying nonself-adjoint subalgebras of C*-algebras through their
representation theory, and the main pillar was a generalization of the Sz.Nagy dilation
theory. In the past four decades, these ideas have been developed into a major tool
for studying these algebras. I will survey some of these ideas.
