English

Equivariant vector bundles on toric schemes over semirings

Algebraic Geometry 2025-07-30 v1

Abstract

We introduce a notion of equivariant vector bundles on schemes over semirings. We do this by considering the functor of points of a locally free sheaf. We prove that every toric vector bundle on a toric scheme XX over an idempotent semifield equivariantly splits as a sum of toric line bundles. We then study the equivariant Picard group PicG(X)\text{Pic}_G(X). Finally, we prove a version of Klyachko's classification theorem for toric vector bundles over an idempotent semifield.

Keywords

Cite

@article{arxiv.2406.06933,
  title  = {Equivariant vector bundles on toric schemes over semirings},
  author = {Jaiung Jun and Kalina Mincheva and Jeffrey Tolliver},
  journal= {arXiv preprint arXiv:2406.06933},
  year   = {2025}
}