AG Lie-Gruppen: Kang Li

Date: 06-12-2021Time: 2:15 PM – 3:45 PMLocation: Übungsraum Ü2, Cauerstr. 11, Erlangen

Vortragender: Kang Li, FAU Erlangen
Veranstalter: Karl-Hermann Neeb

Titel: Ghost projections and expanderish graphs

Abstract:

Roughly speaking, a ghost operator is often an infinite matrix such that its
matrix entries vanish at the infinity. This notion was introduced by Guoliang
Yu
in the study of the so-called coarse Baum-Connes conjecture. It is a very
central topic in coarse geometry and operator algebras with applications to
provide counterexamples to the coarse Baum-Connes conjecture, the existence of
non-exact groups and the rigidity problem for Roe-type algebras. In this talk,
we will visualize a class of ghost projections in terms of expanderish graphs.

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Event Details

Date:
06-12-2021
Time:
2:15 PM – 3:45 PM
Location:

Übungsraum Ü2, Cauerstr. 11, Erlangen

Event Categories:
LIE-Gruppen