English

Resolutions of Type $\mathbb{A}$ Quantum Surface Singularities

Rings and Algebras 2025-12-08 v2 Algebraic Geometry

Abstract

Let B=kq[u,v]Cn+1B = \Bbbk_q[u,v]^{C_{n+1}} be a Type An\mathbb{A}_n quantum Kleinian singularity, which is an example of a noncommutative surface singularity. This singularity is known to have a noncommutative quasi-crepant resolution Λ\Lambda, which is an "algebraic" resolution of BB. We construct a category X\mathcal{X} which serves as a "geometric" resolution of BB by adapting techniques from quiver GIT and show that X\mathcal{X} and mod-Λ\text{mod-}\Lambda are derived equivalent. Furthermore, we show that the intersection arrangement of lines in the exceptional locus of X\mathcal{X} corresponds to a Type An\mathbb{A}_n Dynkin diagram. This generalises the geometric McKay correspondence for classical Kleinian singularities.

Keywords

Cite

@article{arxiv.2510.07137,
  title  = {Resolutions of Type $\mathbb{A}$ Quantum Surface Singularities},
  author = {Simon Crawford and Susan J. Sierra},
  journal= {arXiv preprint arXiv:2510.07137},
  year   = {2025}
}
R2 v1 2026-07-01T06:24:13.274Z