English

Exceptional Collections for Toric Fano Fivefolds

Algebraic Geometry 2025-12-16 v1

Abstract

Resolutions of the diagonal of toric varieties has been an active area of study since Beilinson's celebrated resolution of the diagonal for \PPn\PP^n and the disproof of King's conjecture. The author generalized a cellular resolution of the diagonal given by Bayer-Popescu-Sturmfels to yield a virtual resolution of the diagonal for smooth projective toric varieties, which extends to toric Deligne-Mumford stacks which are a global quotient of a smooth projective variety by a finite abelian group. Moreover, a celebrated result of Hanlon-Hicks-Lazarev gives a symmetric, minimal resolution of the diagonal for smooth projective toric varieties. This work studies when smooth projective toric Fano varieties in dimension 5 yield exceptional collections of line bundles using a resolution of the diagonal. We give the first known count of 300 out of 866 smooth projective toric Fano 5-folds for which the Hanlon-Hicks-Lazarev resolution of the diagonal yields a full strong exceptional collection of line bundles.

Keywords

Cite

@article{arxiv.2512.11801,
  title  = {Exceptional Collections for Toric Fano Fivefolds},
  author = {Reginald Anderson},
  journal= {arXiv preprint arXiv:2512.11801},
  year   = {2025}
}

Comments

9 pages

R2 v1 2026-07-01T08:22:35.468Z