English

Kov\'acs' conjecture on characterization of projective space and hyperquadrics

Algebraic Geometry 2026-02-02 v2

Abstract

We prove Kov\'acs' conjecture that claims that if the pthp^{th} exterior power of the tangent bundle of a smooth complex projective variety contains the pthp^{th} exterior power of an ample vector bundle then the variety is either projective space or the pp-dimensional quadric hypersurface. We also prove a similar characterization involving symmetric powers instead of exterior powers. This provides a common generalization of Mori, Wahl, Cho-Sato, Andreatta-Wi\'sniewski, Kobayashi-Ochiai, and Araujo-Druel-Kov\'acs type characterizations of such varieties.

Keywords

Cite

@article{arxiv.2601.10055,
  title  = {Kov\'acs' conjecture on characterization of projective space and hyperquadrics},
  author = {Soham Ghosh},
  journal= {arXiv preprint arXiv:2601.10055},
  year   = {2026}
}

Comments

Symmetric power characterization added. Comments welcome!

R2 v1 2026-07-01T09:05:16.596Z