Speaker: Taro Sogabe (Kyoto Univ.)

Title: The ext groups and homotopy groups of the automorphism groups of Cuntz-Krieger algebras

Time/Date: 4:45-6:15pm, June 11 (Tue), 2024.

Room: 126 Math Sci Building (It will be also online. The Zoom link is the same as before. If you don't have one, please ask Kawahigashi.)

Abstract: The strong and weak extension groups are important invariants for the Cuntz--Krieger algebras, and their relationships with the homotopy groups of automorphism groups are investigated by J. Cuntz. We would like to explain the work of J. Cuntz together with a more general result of M. Dadarlat, and then show a relationship between K-theoretical and ext-theoretical invariants for the Cuntz--Krieger algebras. This talk is about a joint work with Kengo Matsumoto.