The module-category pullback conjecture for commutative semiring infinity-categories

Let RCAlgFin\mathcal{R}\in\operatorname{CAlg}_{\operatorname{Fin}} and let L\mathcal{L} be a cyclic commutative algebra over R\mathcal{R}, meaning a commutative Fin\operatorname{Fin}-algebra with essentially surjective map RL\mathcal{R}\to\mathcal{L}. Let ModL(SymMon)\operatorname{Mod}_{\mathcal{L}}(\operatorname{SymMon}_\infty^\otimes) and ModR(SymMon)\operatorname{Mod}_{\mathcal{R}}(\operatorname{SymMon}_\infty^\otimes) denote the corresponding infinity-categories of module objects, and similarly let ModMdl(L)(PrL,)\operatorname{Mod}_{\operatorname{Mdl}(\mathcal{L})}(\operatorname{Pr}^{\operatorname{L},\otimes}_\infty) and ModMdl(R)(PrL,)\operatorname{Mod}_{\operatorname{Mdl}(\mathcal{R})}(\operatorname{Pr}^{\operatorname{L},\otimes}_\infty) denote the presentable module categories. Module-category pullback conjecture. The square

\xymatrix{ \operatorname{Mod}_{\mathcal{L}}(\operatorname{SymMon}_\infty^\otimes)\ar[r]\ar[d] &\operatorname{Mod}_{\mathcal{R}}(\operatorname{SymMon}_\infty^\otimes)\ar[d] \\ \operatorname{Mod}_{\operatorname{Mdl}(\mathcal{L})}(\operatorname{Pr}^{\operatorname{L},\otimes}_\infty)\ar[r] &\operatorname{Mod}_{\operatorname{Mdl}(\mathcal{R})}(\operatorname{Pr}^{\operatorname{L},\otimes}_\infty). }

is a pullback square. This proposed extension concerns the full infinity-categories of modules and is described by the authors as harder to prove; the preceding proposition establishes the analogous equivalence on classifying spaces of coherent module structures, but no resolution of this stronger statement is supplied.

Sources & referencesView supporting material

Primary source

John D. Berman, “On the Commutative Algebra of Categories”, arXiv:1606.05606 (2018).

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