The facet ideal of a simplicial complex

Details The facet ideal of a simplicial complex The facet ideal of a simplicial complex

2002-10-07

arxiv.org/abs/math/0210110v1

Mathematics

Commutative Algebra

To appear in Manuscripta Mathematica

Scientific paper

To a simplicial complex, we associate a square-free monomial ideal in the polynomial ring generated by its vertex set over a field. We study algebraic properties of this ideal via combinatorial properties of the simplicial complex. By generalizing the notion of a tree from graphs to simplicial complexes, we show that ideals associated to trees satisfy sliding depth condition, and therefore have normal and Cohen-Macaulay Rees rings. We also discuss connections with the theory of Stanley-Reisner rings.

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