The Busemann-Petty problem in hyperbolic and spherical spaces

Abstract

The Busemann-Petty problem asks whether origin-symmetric convex bodies in ${\mathbb{R}}^n$ with smaller central hyperplane sections necessarily have smaller $n$-dimensional volume. It is known that the answer to this problem is affirmative if $n\le 4$ and negative if $n\ge 5$. We study this problem in hyperbolic and spherical spaces.

16 pages, 2 figures