Decomposing Björner's Matrix

Details Decomposing Björner's Matrix Decomposing Björner's Matrix

2010-11-30

arxiv.org/abs/1011.6612v1

Mathematics

Combinatorics

5 pages, no figures

Scientific paper

We give an alternative proof of a (former) conjecture of Bj\"orner stating
that the matrix expressing face numbers in terms of g numbers is totally
non-negative. We briefly discuss the case of simple flag polytopes.

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