English

HMS symmetries of toric boundary divisors

Algebraic Geometry 2024-03-26 v1 Symplectic Geometry

Abstract

Let XX be a projective crepant resolution of a Gorenstein affine toric variety and let ((C)k,f)((\mathbb{C}^*)^k,f) be the LG-model which is the Hori-Vafa mirror dual of XX. Let D{D} be a generic fiber of ff equipped with the restriction of the standard Liouville form on (C)k(\mathbb{C}^*)^k. Let KA\mathcal{K}_A be the so-called "stringy K\"ahler moduli space" of XX. We show that π1(KA)\pi_1(\mathcal{K}_A) acts on the wrapped Fukaya category of DD. Using results by Gammage - Shende and Zhou, this result implies that π1(KA)\pi_1(\mathcal{K}_A) acts on Db(coh(X))D^b(\operatorname{coh}(\partial X)) where X\partial X is the toric boundary divisor of XX. We show that the induced action of π1(KA)\pi_1(\mathcal{K}_A) on K0(coh(X))K_0(\operatorname{coh}(\partial X)) may be extended in a natural way to an action on K0(X)K_0(X) which corresponds to a GKZ system.

Keywords

Cite

@article{arxiv.2403.15660,
  title  = {HMS symmetries of toric boundary divisors},
  author = {Špela Špenko and Michel Van den Bergh},
  journal= {arXiv preprint arXiv:2403.15660},
  year   = {2024}
}

Comments

75 pages