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arxiv: 2207.01021 · v2 · pith:PWM3SZDHnew · submitted 2022-07-03 · 🧮 math.AG

Brill-Noether reconstruction of index one prime Fano threefolds

classification 🧮 math.AG
keywords fanobrill-noetherconjectureindexkuznetsovmathcalprimethreefold
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We show by a uniform argument that every index one prime Fano threefold $X$ of genus $g\geq 6$ can be reconstructed as a Brill-Noether locus inside a Bridgeland moduli space of stable objects in the Kuznetsov component $\mathcal{K}u(X)$. As an application, we verify Mukai's conjecture on the existence of dual embeddings of $X$. Moreover, we establish a refined categorical Torelli theorem for $X$ and classify autoequivalences of $\mathcal{K}u(X)$. We also give an alternative disproof of Kuznetsov's Fano threefold conjecture.

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  1. Tilt-stability on singular schemes and Bogomolov-Gieseker-type inequalities

    math.AG 2026-05 unverdicted novelty 7.0

    Tilt-stability is extended to singular schemes, a generalized Bogomolov-Gieseker conjecture is formulated and verified for certain singular threefolds, and stability conditions are constructed on relative Kuznetsov co...