05.06.2025, 16:15
– Raum 1.22
Forschungsseminar Differentialgeometrie
Elliptic operators and uniform K-homology
Lyko Matti (Greifswald)
Prof. Daniel Lenz (Universität Jena)
Abstract: Uniformity of continuous SL(2,R) valued cocycles over uniquely dynamical systems has featured in various contexts. Walters asked in '86 whether every uniquely ergodic system admits a non-uniform cocycle. On the other hand in the last two decades uniformity of Schroedinger cocycles has become a main tool in establishing Cantor spectrum of Lebesgue measure zero for quasicrystal operators. Recently, this circle of ideas has lead to spectral results on graph Laplacians associated to certain self-similar groups. In the talk we will provide some overview on the topic.