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 exterior power of the tangent bundle of a smooth complex projective variety contains the exterior power of an ample vector bundle then the variety is either projective space or the -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.
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!