A combinatorial study of multiplexes and ordinary polytopes

Details A combinatorial study of multiplexes and ordinary polytopes A combinatorial study of multiplexes and ordinary polytopes

2001-01-09

arxiv.org/abs/math/0101076v1

Mathematics

Combinatorics

Scientific paper

Bisztriczky defines a multiplex as a generalization of a simplex, and an ordinary polytope as a generalization of a cyclic polytope. This paper presents results concerning the combinatorics of multiplexes and ordinary polytopes. The flag vector of the multiplex is computed, and shown to equal the flag vector of a many-folded pyramid over a polygon. Multiplexes, but not other ordinary polytopes, are shown to be elementary. It is shown that all complete subgraphs of the graph of a multiplex determine faces of the multiplex. The toric h-vectors of the ordinary 5-dimensional polytopes are given. Graphs of ordinary polytopes are studied. Their chromatic numbers and diameters are computed, and they are shown to be Hamiltonian.

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