English

Numerical action for endomorphisms

Dynamical Systems 2025-02-10 v1 Algebraic Geometry

Abstract

Let f:XXf: X\to X be a surjective endomorphism of a projective variety of dimension dd. The aim of this paper is to study the action of ff on the numerical group of divisors. For exmaple, I proved that ff is cohomologically hyperbolic if and only if it is quasi-amplified; and it is amplified if and only if every subsystem of (X,f)(X,f) is cohomologically hyperbolic. For the proofs, I introduced a notion of spectrum in linear algebra for an open and saliant invariant cone. I also introduce a notion of generated (positive) cycles as an algebraic analogy of (positive) closed current.

Keywords

Cite

@article{arxiv.2502.04779,
  title  = {Numerical action for endomorphisms},
  author = {Junyi Xie},
  journal= {arXiv preprint arXiv:2502.04779},
  year   = {2025}
}

Comments

35 pages

R2 v1 2026-06-28T21:35:53.811Z