English

Virtual resolutions of points in $\mathbb{P}^1 \times \mathbb{P}^1$

Commutative Algebra 2022-04-13 v2 Algebraic Geometry

Abstract

We explore explicit virtual resolutions, as introduced by Berkesch, Erman, and Smith, for ideals of sets of points in P1×P1\mathbb{P}^1 \times \mathbb{P}^1. Specifically, we describe a virtual resolution for a sufficiently general set of points XX in P1×P1\mathbb{P}^1 \times \mathbb{P}^1 that only depends on X|X|. We also improve an existence result of Berkesch, Erman, and Smith in the special case of points in P1×P1\mathbb{P}^1 \times \mathbb{P}^1; more precisely, we give an effective bound for their construction that gives a virtual resolution of length two for any set of points in P1×P1\mathbb{P}^1 \times \mathbb{P}^1.

Cite

@article{arxiv.2106.02759,
  title  = {Virtual resolutions of points in $\mathbb{P}^1 \times \mathbb{P}^1$},
  author = {Megumi Harada and Maryam Nowroozi and Adam Van Tuyl},
  journal= {arXiv preprint arXiv:2106.02759},
  year   = {2022}
}

Comments

19 pages

R2 v1 2026-06-24T02:51:32.571Z