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arxiv: 1210.1336 · v1 · pith:YWDNCCKGnew · submitted 2012-10-04 · 🧮 math.AC · math.CO

Cohen-Macaulay r-partite graphs with minimal clique cover

classification 🧮 math.AC math.CO
keywords cohen-macaulaygraphpartitecliquecoversomecliquesconditions
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In this note, we give some necessary conditions for an $r$-partite graph such that the edge ring of the graph is Cohen-Macaulay. It is proved that if $G$ is an $r$-partite Cohen-Macaulay graph which is covered by some disjoint cliques of size $r$, then the clique cover is unique.

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