ΕΚΔΗΛΩΣΕΙΣ

SEMINAR: FUNCTIONAL ANALYSIS AND OPERATOR ALGEBRAS - EXTENSIONS, UNITARIZABILITY, AND AMENABLE OPERATOR ALGEBRAS

Friday 03 Ιουνίου 2022

Σεμινάριο: Συναρτησιακή Ανάλυση και Άλγεβρες Τελεστών

(Online via zoom)

Friday, June 3, 2022 at 17:00 Athens time

Speaker: Yemon Choi (U. Lancaster, UK)

TitleExtensions, unitarizability, and amenable operator algebras

Abstract: In work with Farah and Ozawa, we exhibited a closed subalgebra of ℓ⊗M2 which is amenable, yet is not Banach-algebra-isomorphic to any C*-algebra; the non-isomorphism is witnessed by the failure to be "unitarizable" of certain bounded subgroups of matrix corona algebras. It remains an open question whether similar "counterexamples" can be found inside C(K)⊗Md for metrizable K. In this talk we report on some work in progress, joint with B. Green (Lancaster), investigating what can be said when K has finite Cantor-Bendixson rank.

Zoom meeting coordinates upatras-gr.zoom.us/j/99245950296

or  Meeting ID: 992 4595 0296 Passcode: cstaralg

For additional information see the seminar webpage

http://users.uoa.gr/~akatavol/anak2122.html