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arXiv · 2510.23547

Homological freeness criterion for operadic modules and application to Cohen-Macalayness of posets

Paul Laubie
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Abstract

We show a variation of the usual homological freeness criterion for operadic modules over a Koszul operad. We then apply this result to decorated partition posets for some operads, showing that their augmentation is Cohen-Macaulay and computing its homology. This work answers several open questions asked by B\'er\'enice Delcroix-Oger and Cl\'ement Dupont in a recent article.

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Paul Laubie. 2025-10-27. Homological freeness criterion for operadic modules and application to Cohen-Macalayness of posets. https://arxiv.org/abs/2510.23547

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