On the k-Systems of a Simple Polytope

Details On the k-Systems of a Simple Polytope On the k-Systems of a Simple Polytope

2000-12-20

arxiv.org/abs/math/0012204v2

Mathematics

Combinatorics

8 pages, 3 figures, LaTeX 2e

Scientific paper

A k-system of the graph G(P) of a simple polytope P is a set of induced subgraphs of G(P) that shares certain properties with the set of subgraphs induced by the k-faces of P. This new concept leads to polynomial-size certificates in terms of G(P) for both the set of vertex sets of facets as well as for abstract objective functions (AOF) in the sense of Kalai. Moreover, it is proved that an acyclic orientation yields an AOF if and only if it induces a unique sink on every 2-face.

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