Horosphere slab separation theorems in manifolds without conjugate points

Author

Department of Mathematics, Modern Academy, Maadi, Cairo, Egypt

https://doi.org/10.1186/s42787-019-0038-5

Abstract

Let Wn be the set of smooth complete simply connected n-dimensional manifolds
without conjugate points. The Euclidean space and the hyperbolic space are examples
of these manifolds. Let W ∈ Wn and let A and B be two convex subsets of W. This note
aims to investigate separation and slab horosphere separation of A and B. For example,
sufficient conditions on A and B to be separated by a slab of horospheres are obtained.
Existence and uniqueness of foot points and farthest points of a convex set A in
W ∈ W are considered.

Keywords