Cubical subdivisions and local $h$-vectors

Details Cubical subdivisions and local $h$-vectors Cubical subdivisions and local $h$-vectors

2010-07-19

arxiv.org/abs/1007.3154v3

Mathematics

Combinatorics

Final version; Example 4.9 slightly generalized, Example 7.12 added, comments by referees incorporated, etc

Scientific paper

Face numbers of triangulations of simplicial complexes were studied by Stanley by use of his concept of a local $h$-vector. It is shown that a parallel theory exists for cubical subdivisions of cubical complexes, in which the role of the $h$-vector of a simplicial complex is played by the (short or long) cubical $h$-vector of a cubical complex, defined by Adin, and the role of the local $h$-vector of a triangulation of a simplex is played by the (short or long) cubical local $h$-vector of a cubical subdivision of a cube. The cubical local $h$-vectors are defined in this paper and are shown to share many of the properties of their simplicial counterparts. Generalizations to subdivisions of locally Eulerian posets are also discussed.

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