The reduced-stability conjecture

Let (X,H)(X,H) be a smooth polarized variety over C\mathbb{C}, and let ΛH\Lambda_H be the HH-polarized lattice. Let Bn\mathfrak B_n and ±Bn\pm\mathfrak B_n be the spaces of reduced central charges defined from the functionals Bt\mathsf B_{\underline t}, and write SbH(X)\operatorname{Sb}_H^*(X) for reduced stability conditions. Reduced-stability conjecture. There exists a family of reduced stability conditions SbH(X)\operatorname{Sb}_H^*(X) such that

Forg:SbH(X)Hom(ΛH,R),σ~=(A,B)B\operatorname{Forg}:\operatorname{Sb}_H^*(X)\to\operatorname{Hom}(\Lambda_H,\mathbb R),\qquad \widetilde\sigma=(\mathcal A,B)\mapsto B

is a homeomorphism onto Bn\mathfrak B_n, the extended map

Forg:nZSbH(X)[n]±Bn\operatorname{Forg}:\coprod_{n\in\mathbb Z}\operatorname{Sb}_H^*(X)[n]\to\pm\mathfrak B_n

is a universal cover, the family is preserved by tensoring with OX(H)\mathcal O_X(H), and whenever s<t<s[1]\underline s<\underline t<\underline s[1] one has σ~sσ~tσ~s[1]\widetilde\sigma_{\underline s}\lesssim\widetilde\sigma_{\underline t}\lesssim\widetilde\sigma_{\underline s}[1]. These properties generalize the corresponding constructions known for curves, surfaces, and certain threefolds; the conjecture remains open in the general setting considered here.

Sources & referencesView supporting material

Primary source

Chunyi Li, “A Real Reduction of the Manifold of Bridgeland Stability Conditions”, arXiv:2506.21995 (2025).

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