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Semiconcave functions in Alexandrov geometry

Introductory Workshop: Modern Riemannian Geometry January 18, 2016 - January 22, 2016

January 19, 2016 (03:30 PM PST - 04:30 PM PST)
Speaker(s): Vitali Kapovitch (University of Toronto)
Location: SLMath: Eisenbud Auditorium
Tags/Keywords

  • differential geometry

  • Riemannian geometry

  • modern geometry

  • curvature

  • curvature estimates

  • Ricci curvature

  • Ricci curvature lower bounds

  • Alexandrov spaces

  • stratified manifolds

  • nilmanifold

Primary Mathematics Subject Classification
Secondary Mathematics Subject Classification No Secondary AMS MSC
Video

14428
Abstract

I will talk about semiconcave functions on Alexandrov spaces with curvature bounded below. Semiconcave functions and their gradient flows provide an important technical tool for studying Alexandrov spaces with curvature bounded below. I will discuss basic properties and constructions of semi-concave functions and will talk about applications such as Morse theory on Alexandrov spaces which shows that a finite dimensional Alexandrov spaces are stratified manifolds. I will also discuss other applications such as various nilpotency theorems as well as some open problems.
Supplements
25098?type=thumb Kapovitch 25.2 KB application/pdf Download
Video/Audio Files

14428

H.264 Video 14428.mp4 314 MB video/mp4 rtsp://videos.msri.org/14428/14428.mp4 Download
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