The generalized Bogomolov–Gieseker stability conjecture for twisted varieties

Let XX be a smooth projective variety equipped with a Brauer class αBr(X)\alpha\in\operatorname{Br}(X), and let ω\omega and DD be real divisors on XX, with ω\omega ample. Define

Zω,D(E)=XeiωchD(E).Z_{\omega,D}(E)=-\int_X e^{-i\omega}\cdot\operatorname{ch}^{D}(E).

Twisted stability-condition conjecture. There exists a bounded t-structure on Dperf(X,α)\mathrm{D}_{\mathrm{perf}}(X,\alpha) with heart Aω,D\mathcal{A}_{\omega,D} such that (Zω,D,Aω,D)(Z_{\omega,D},\mathcal{A}_{\omega,D}) is a full numerical stability condition. This is the twisted extension of the conjectural existence of stability conditions proposed by Bayer, Macrì, and Toda. The supplied status evidence indicates that the statement is resolved in the relevant setting, with a theorem giving a solution when dimX=2\dim X=2 over a field of characteristic zero; the general conjecture is not established by that theorem.

Sources & referencesView supporting material

Primary source

James Hotchkiss and Alexander Perry, “The period-index conjecture for abelian threefolds and Donaldson-Thomas theory”, arXiv:2405.03315 (2024).

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