Higher Cohen-Macaulay property of squarefree modules and simplicial posets

Yanagawa, Kohji

doi:10.1090/S0002-9939-2011-10734-2

Higher Cohen-Macaulay property of squarefree modules and simplicial posets
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Proc. Amer. Math. Soc. 139 (2011), 3057-3066 Request permission

Abstract:

Recently, G. Fløystad studied higher Cohen-Macaulay property of certain finite regular cell complexes. In this paper, we partially extend his results to squarefree modules, toric face rings, and simplicial posets. For example, we show that if (the corresponding cell complex of) a simplicial poset is $l$-Cohen-Macaulay, then its codimension one skeleton is $(l+1)$-Cohen-Macaulay.

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