A derived Chouinard's theorem for infinite groups

Natàlia Castellana; Juan Omar Gómez

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arXiv · 2609.31030

A derived Chouinard's theorem for infinite groups

Natàlia Castellana·Juan Omar Gómez

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Abstract

We establish a Chouinard-type theorem for modules over algebras of cochains on the classifying spaces of a broad class of infinite groups, allowing commutative ring spectra as coefficients. We then use this result to study finiteness properties of the integral cohomology rings of certain infinite groups, as well as stratification of the corresponding module categories. In particular, we complete the (co)stratification of module categories associated to homotopical groups over fields of positive characteristic.

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Natàlia Castellana, Juan Omar Gómez. 2026-09-25. A derived Chouinard's theorem for infinite groups. https://arxiv.org/abs/2609.31030

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