The face ideal of a simplicial complex
Jürgen Herzog, Takayuki Hibi
Abstract
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Jürgen Herzog, Takayuki Hibi
Abstract
Open-access reader
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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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.
Key concepts: Simplicial complex, Simplicial manifold, Simplicial approximation theorem, h-vector, Simplicial homology, Abstract simplicial complex, Mathematics, Simplicial set