English

Combinatorial Seshadri stratifications on normal toric varieties

Algebraic Geometry 2025-05-06 v2 Combinatorics

Abstract

We apply the theory of Seshadri stratifications to embedded toric varieties XPP(V)X_P\subseteq \mathbb P(V) associated with a normal lattice polytope PP. The approach presented here is purely combinatorial and completely independent of \cite{CFL}. In particular, we get a close connection between a certain class of triangulations of the polytope PP, Seshadri stratifications of XPX_P arising from torus orbit closures, and the associated degenerate semi-toric varieties. In the last section we show that the approach here and the one in \cite{CFL} produce the same quasi-valuations and hence the same degenerations of XPX_P.

Keywords

Cite

@article{arxiv.2501.16161,
  title  = {Combinatorial Seshadri stratifications on normal toric varieties},
  author = {Rocco Chirivì and Martina Costa Cesari and Xin Fang and Peter Littelmann},
  journal= {arXiv preprint arXiv:2501.16161},
  year   = {2025}
}

Comments

v2: typo corrected, 31 pages, to appear in Journal of Algebra 60th anniversary volume

R2 v1 2026-06-28T21:19:54.049Z