English

Hard Lefschetz theorems for free line bundles

Algebraic Geometry 2023-05-31 v1

Abstract

We introduce a partial positivity notion for algebraic maps via the defect of semismallness. This positivity notion is modeled on mm-positivity in the analytic setting and mm-ampleness in the geometric setting. Using this positivity condition for algebraic maps, we establish K\"ahler packages, that is, Hard Lefschetz theorems and Hodge-Riemann bilinear relations, for the complete intersections of Chern classes of free line bundles.

Keywords

Cite

@article{arxiv.2305.19085,
  title  = {Hard Lefschetz theorems for free line bundles},
  author = {Jiajun Hu and Shijie Shang and Jian Xiao},
  journal= {arXiv preprint arXiv:2305.19085},
  year   = {2023}
}

Comments

14 pages; comments welcome!

R2 v1 2026-06-28T10:50:43.784Z