Rostislav Grigorchuk: "Spectra of groups and graphs: a short survey"
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Europe/Paris
435 (UMPA)
435
UMPA
Description
In my talk I will touch on such topics as shape of the spectrum of Cayley and Schreier graphs of finitely generated groups, type of spectral measures, the question of A.Valette "Can one hear the shape of a group", and the relation to the random Schroedinger operator.
Based on numerous results with coauthors: L. Bartholdi, A.Zuk, Z.Sunic, D.Lenz, T.Nagnibeda, A.Perez, B.Simanek, A.Dudko and others.