Alexander duality for monomial ideals associated with isotone maps between posets
Alexander duality for monomial ideals associated with isotone maps between posets
复制标题
与偏序集之间等调图相关的单项式理想的亚历山大对偶性
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
Akihiro Shikama
中科院分区:
文献类型:
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作者:
J. Herzog;A. Qureshi;Akihiro Shikama
For a pair $(P,Q)$ of finite posets the generators of the ideal $L(P,Q)$ correspond bijectively to the isotone maps from $P$ to $Q$. In this note we determine all pairs $(P,Q)$ for which the Alexander dual of $L(P,Q)$ coincides with $L(Q,P)$, up to a switch of the indices.