On the existence of completely saturated packings and completely reduced covering

Details On the existence of completely saturated packings and completely reduced covering On the existence of completely saturated packings and completely reduced covering

2001-10-23

arxiv.org/abs/math/0110260v1

Mathematics

Metric Geometry

14 pages, 1 figure

Scientific paper

A packing by a body $K$ is collection of congruent copies of $K$ (in either Euclidean or hyperbolic space) so that no two copies intersect nontrivially in their interiors. A covering by $K$ is a collection of congruent copies of $K$ such that for every point $p$ in the space there is copy in the collection containing $p$. A completely saturated packing is one in which it is not possible to replace a finite number of bodies of the packing with a larger number and still remain a packing. A completely reduced covering is one in which it is not possible to replace a finite number of bodies of the covering with a smaller number and still remain a covering. It was conjectured by G. Fejes Toth, G. Kuperberg, and W. Kuperberg that completely saturated packings and commpletely reduced coverings exist for every body $K$ in either $n$-dimensional Euclidean or $n$-dimensional hyperbolic space. We prove this conjecture.

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