New Focaccias - Turkey, ham & pepperoni focaccia with tomato, red onion & Cajun mayo. £4.90. Make it a meal deal: add a snack and a drink for £6.95.
Sweet Bites - beignets (jam-filled doughnut balls): £1 each or six for £5
Add any muffin to your hot or cold drink for only £2 after 2:00 p.m every day in April.
Buy five creams and get your sixth free.
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13:30
Single generation of C*-algebras
Abstract
One of the problems posed by Kadison in 1967 asks whether every separably acting von Neumann algebra is generated by a single element. The problem remains open in its full generality but significant progress has been made since. One can of course ask the same question in the C*-algebraic setting where, however, counterexamples are abundant even among commutative C*-algebras. I will give an overview of the history of the problem and then discuss some recent results on single generation of C*-algebras associated to graphs and C*-algebras with Cartan subalgebras.
13:30
13:30
Almost-homomorphisms on C*-algebras
Abstract
We consider the question of whether almost-homomorphisms are close to honest homomorphisms. I’ll survey a few historical results, with different source/target collections of algebras, and also consider what to take as the definition of “almost-homomorphisms”. If we end up having time, I will sketch an elementary proof that almost-characters from commutative C*-algebras are close to honest characters.