香蕉视频

Title: Extracting hyperbolicity from CAT(0) geometry.聽

Abstract: Highly influential in the study of mapping class groups was聽the discovery of Masur--Minsky that the curve graph is hyperbolic, as聽this provides a natural framework in which to study their聽negative-curvature properties. From this perspective, curve graphs are聽in many ways as good as it gets. In this talk I'll discuss a recent聽analogue of curve graphs that can be defined for any CAT(0) space. Joint聽with Davide Spriano and Abdul Zalloum.