The abelian subgroup conjecture for doubly twisted mapping torus categories

Let A\mathcal{A} be a dg category with strictly commuting strict dg auto-equivalences ϕ\phi and ψ\psi, and let Mϕ,ψM_{\phi,\psi} be the associated doubly twisted mapping torus category. Likewise define Mϕ,ψM_{\phi',\psi'} for another commuting pair ϕ,ψ\phi',\psi'. Write Auteq(Dπ(A))\operatorname{Auteq}(D^\pi(\mathcal{A})) for the group of auto-equivalences of Dπ(A)D^\pi(\mathcal{A}). Abelian subgroup conjecture. Mϕ,ψM_{\phi,\psi} is Morita equivalent to Mϕ,ψM_{\phi',\psi'} if and only if the abelian subgroups ϕ,ψ\langle\phi,\psi\rangle and ϕ,ψ\langle\phi',\psi'\rangle of Auteq(Dπ(A))\operatorname{Auteq}(D^\pi(\mathcal{A})) are the same. This is proposed as a two-parameter generalization of the preceding mapping-torus result and is motivated by the expected relation with the wrapped Fukaya category of the doubly twisted symplectic mapping torus; the supplied text gives no resolution.

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Primary source

Yusuf Barış Kartal, “Dynamical invariants of mapping torus categories”, arXiv:1809.04046 (2021).

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