Organizing Volumes of Right-Angled Hyperbolic Polyhedra

Details Organizing Volumes of Right-Angled Hyperbolic Polyhedra Organizing Volumes of Right-Angled Hyperbolic Polyhedra

2008-09-11

arxiv.org/abs/0809.2111v1

Mathematics

Geometric Topology

34 pages, 8 figures, to appear in Algebraic & Geometric Topology

Scientific paper

This article defines a pair of combinatorial operations on the combinatorial structure of compact right-angled hyperbolic polyhedra in dimension three called decomposition and edge surgery. It is shown that these operations simplify the combinatorics of such a polyhedron, while keeping it within the class of right-angled objects, until it is a disjoint union of L\"obell polyhedra, a class of polyhedra which generalizes the dodecahedron. Furthermore, these combinatorial operations are shown to have geometric realizations which are volume decreasing. This allows for an organization of the volumes of right-angled hyperbolic polyhedra and allows, in particular, the determination of the polyhedra with smallest and second-smallest volumes.

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