Title: Around Cowling’s conjecture
Speaker: Ignacio Vergara（Leonhard Euler International Mathematical Institute in Saint Petersburg）
Time: Wednesday, May 18, 2022, 16:00-17:30 (UTC+8)
Location: Zoom, Zoom Meeting ID: 824 7045 6491, Password: 123399
Abstract：Two very important concepts arose from Haagerup’s highly influential work on the reduced C*-algebra of the free group: weak amenability and the Haagerup property. It is an open problem to determine whether weak amenability with Cowling-Haagerup constant 1 implies the Haagerup property. This is often referred to as Cowling’s conjecture. In this talk, I will give an overview of this question, and I will discuss a recent progress in this direction: Every countable weakly amenable group with Cowling-Haagerup constant 1 admits a proper cocycle for a uniformly bounded representation on a subspace of an L1 space.
Meeting link：https://zoom.us/j/82470456491?pwd=dGswU3d3RGd1L1d4a3ZvSXdnakVkUT09
Around Cowling’s conjecture.jpg
More information about the Functional Analysis Seminar can be found here.
