Speaker: Guo Chuan Thiang

Title: Large-scale quantization and coarse cohomology

Abstract: Roe developed coarse cohomology to do large-scale index theory. Independently, physicists discovered quantization of Hall conductance as a universal large-scale spectral phenomenon. I will make a direct connection between these two worlds, and provide physical interpretations of K-theoretic non-triviality in Roe-type algebras.