Nie jesteś zalogowany | zaloguj się

Wydział Matematyki, Informatyki i Mechaniki Uniwersytetu Warszawskiego

  • Skala szarości
  • Wysoki kontrast
  • Negatyw
  • Podkreślenie linków
  • Reset

Aktualności — Wydarzenia

North Atlantic Noncommutative Geometry Seminar

 

APPROXIMATION PROPERTIES FOR LOCALLY COMPACT QUANTUM GROUPS


Prelegent: JACEK KRAJCZOK

2022-12-14 17:15

One of the most widely studied properties of groups is the notion of amenability. In one of its many formulations, it gives us a way of approximating constant functions by functions in the Fourier algebra. The notion of amenability was relaxed in various directions. For instance, a very weak form of amenability, called the approximation property (AP), was introduced by Haagerup and Kraus in 1994. It still gives us a way of approximating constant functions by functions in the Fourier algebra, but in a much weaker sense. During the talk, I will introduce AP for locally compact quantum groups, and discuss some of its permanence properties and its relation to the weak* operator approximation property of quantum-group von Neumann algebras. The talk is based on a joint work with Matthew Daws and Christian Voigt.