Mathematische Annalen

, Volume 353, Issue 2, pp 305–331

A rigidity theorem in Alexandrov spaces with lower curvature bound

Authors

    • Research Institute for Mathematical SciencesKyoto University
Article

DOI: 10.1007/s00208-011-0686-8

Cite this article as:
Yokota, T. Math. Ann. (2012) 353: 305. doi:10.1007/s00208-011-0686-8

Abstract

Distance functions of metric spaces with lower curvature bound, by definition, enjoy various metric inequalities; triangle comparison, quadruple comparison and the inequality of Lang–Schroeder–Sturm. The purpose of this paper is to study the extremal cases of these inequalities and to prove rigidity results. The spaces which we shall deal with here are Alexandrov spaces which possibly have infinite dimension and are not supposed to be locally compact.

Mathematics Subject Classification (2000)

Primary 53C23Secondary 53C2454E50

Copyright information

© Springer-Verlag 2011