English

Brill-Noether reconstruction of index one prime Fano threefolds

Algebraic Geometry 2026-05-28 v2

Abstract

We show by a uniform argument that every index one prime Fano threefold XX of genus g6g\geq 6 can be reconstructed as a Brill-Noether locus inside a Bridgeland moduli space of stable objects in the Kuznetsov component Ku(X)\mathcal{K}u(X). As an application, we verify Mukai's conjecture on the existence of dual embeddings of XX. Moreover, we establish a refined categorical Torelli theorem for XX and classify autoequivalences of Ku(X)\mathcal{K}u(X). We also give an alternative disproof of Kuznetsov's Fano threefold conjecture.

Keywords

Cite

@article{arxiv.2207.01021,
  title  = {Brill-Noether reconstruction of index one prime Fano threefolds},
  author = {Augustinas Jacovskis and Zhiyu Liu and Shizhuo Zhang},
  journal= {arXiv preprint arXiv:2207.01021},
  year   = {2026}
}

Comments

39 pages. Comments are very welcome! v2: partly rewritten, new results on dual embeddings and autoequivalences are added