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arxiv: 1411.3567 · v2 · pith:35P6ZZN4new · submitted 2014-11-13 · 🧮 math.AC

The face ideal of a simplicial complex

classification 🧮 math.AC
keywords complexidealsimplicialcomplexesfacewhiskeralexanderantichain
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Given a simplicial complex we associate to it a squarefree monomial ideal which we call the face ideal of the simplicial complex, and show that it has linear quotients. It turns out that its Alexander dual is a whisker complex. We apply this construction in particular to chain and antichain ideals of a finite partially ordered set. We also introduce so-called higher dimensional whisker complexes and show that their independence complexes are shellable.

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