English

Fukaya categories of orbifold surfaces in representation theory

Representation Theory 2026-02-20 v1 Rings and Algebras Symplectic Geometry

Abstract

We give an introduction to partially wrapped Fukaya categories of surfaces with orbifold singularities. Dissecting an orbifold surface S\mathbf S into polygons, certain dissections give rise to formal generators, inducing a triangulated equivalence between the derived Fukaya category of S\mathbf S and the perfect derived category of a graded associative algebra. This provides a geometric means for obtaining associative algebras -- conjecturally all -- which are derived equivalent to skew-gentle algebras. We include a new perspective on the partially wrapped Fukaya category of an orbifold disk which serves as a local model for the Fukaya categories of general orbifold surfaces. This perspective yields an equivalence between the perfect derived category of a quiver of type Dn+1\mathrm D_{n+1} and the perfect derived category of a graded quiver of type A~n1\widetilde{\mathrm A}_{n-1}, the latter being equipped with quadratic zero relations and a nontrivial A_\infty structure. This equivalence elucidates the relationship between skew-gentle algebras and orbifold surfaces, and the role of deformation theory in this relationship.

Keywords

Cite

@article{arxiv.2602.17370,
  title  = {Fukaya categories of orbifold surfaces in representation theory},
  author = {Severin Barmeier and Zhengfang Wang},
  journal= {arXiv preprint arXiv:2602.17370},
  year   = {2026}
}

Comments

36 pages, 11 figures, comments are very welcome