Bridgeland-type stability conjecture for symplectic autoequivalences of cubic K3 categories

Let XP5X\subset\mathbb P^5 be a smooth cubic fourfold, let AX\mathcal A_X be its K3 category, and let Auts(AX)\operatorname{Aut}_{\rm s}(\mathcal A_X) denote the group of symplectic autoequivalences. Let P0P_0 and O{\rm O} be the space and group appearing in the stability-condition formulation referenced by the source, and let π1st[P0/O]\pi_1^{\rm st}[P_0/{\rm O}] denote the corresponding stability fundamental group. Bridgeland-type conjecture. There exists an isomorphism

Auts(AX)π1st[P0/O].\operatorname{Aut}_{\rm s}(\mathcal A_X)\simeq\pi_1^{\rm st}[P_0/{\rm O}].

The statement is presented as a reformulation inspired by Bridgeland's conjecture for K3 surfaces. Because the supplied context does not define P0P_0, O{\rm O}, or the superscript st{\rm st}, and gives no resolution status, the conjecture should be checked against the full paper.

Sources & referencesView supporting material

Primary source

Daniel Huybrechts, “The K3 category of a cubic fourfold”, arXiv:1505.01775 (2016).

Additional references

2 papers in this index state this conjecture (2011–2015). The statement above is taken from the most recent of them; the others are arXiv:1111.1745.

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