The unmixed admissible clutter conjecture

Let C\mathcal{C} be an admissible clutter, and let I(C)I(\mathcal{C}) denote its edge ideal. The clutter is unmixed when all its minimal vertex covers have the same cardinality, and I(C)I(\mathcal{C}) is Cohen–Macaulay when its quotient ring has this property in the standard graded sense. Unmixed admissible clutter conjecture. If C\mathcal{C} is unmixed, then I(C)I(\mathcal{C}) is Cohen–Macaulay. This is suggested by the corresponding Cohen–Macaulay and unmixed criteria for bipartite graphs; the general implication for admissible clutters remains open.

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Primary source

Susan Morey, Enrique Reyes and Rafael H. Villarreal, “Cohen-Macaulay, Shellable and unmixed clutters with a perfect matching of König type”, arXiv:0708.3111 (2007).

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