Relatively maximum volume rigidity in Alexandrov geometry

Abstract

Given a compact Alexadrov $n$-space $Z$ with curvature curv $\ge \kappa$, and let $f:Z\to X$ be a distance non-increasing onto map to another Alexandrov $n$-space with curv $\ge \kappa$. The relative volume rigidity conjecture says that if $X$ achieves the relative maximal volume i.e. $vol(Z)=vol(X)$, then $X$ is isometric to $Z/\sim$, where $z,z^{\prime }\in \partial Z$ and $z\sim z^{\prime }$ if only if $f(z)=f(z^{\prime })$. We will partially verify this conjecture, and give a classification for compact Alexandrov $n$-spaces with relatively maximal volume. We will also give an elementary proof for a pointed version of Bishop-Gromov relative volume comparison with rigidity in Alexandrov geometry.

28 pages

References in corpus (1)

• Bounding geometry of loops in Alexandrov spaces

Cited by in corpus (1)

• Lipschitz-Volume rigidity on limit spaces with Ricci curvature bounded from below