Upcoming MAMS Colloquium Series

Fall 2025

9/12/2025, Friday 3:15-4:15 pm in Nord 356
Speaker: Shiri Artstein-Avidan (Tel Aviv University)
Title: Ball-bodies, old and new
Abstract: We will discuss the class of bodies with sectional curvatures bounded below by 1 (it goes by many names: ball bodies, hyperconvex bodies, 1-convex sets, ball summands) which has been studied by various authors in several different contexts, and relates to many open problems in geometry and elsewhere. We will give emphasis on the natural (and unique, in many senses) duality operation defined on the class, and show new results regarding a variant of affine surface area defined for this class by Schuett, Werner and Yalikun.