פעילויות השבוע
אלגבראות של אופרטורים ותורת האופרטורים
K-Stability of Continuous C(X)-Algebras.
אוק 31, 16:00—17:00, 2022, -101 (basement)
מרצה
Apurva Seth (BGU)
תקציר
A C*-algebra is said to be K-stable if its nonstable K-groups are naturally isomorphic to the usual K-theory groups. In this talk, we shall study continuous C(X)-algebras, each of whose fibers are K-stable. We will show that such an algebra is itself K-stable under the assumption that the underlying space X is compact, metrizable, and of finite covering dimension.
BGU Probability and Ergodic Theory (PET) seminar
Recurrence Online
נוב 3, 11:10—12:00, 2022, Room 303 in building 28 (or via zoom)
מרצה
Tomas Persson (Lund University)
תקציר
Recurrence is a classical topic in ergodic theory and dynamical systems, which goes back to Poincaré‘s recurrence theorem. I will talk about old, less old, and new results on recurrence. In particular, I will talk about how to obtain asymptotic results on the number of times a typical point returns to a shrinking neighbourhood around itself.