English

Obstructions to smoothing orbicurves and Orbifold Hecke algebras

Symplectic Geometry 2026-07-13 v1 Quantum Algebra

Abstract

In this paper, we study obstructions to smoothing nodal orbicurves with orbighosts mapped into cyclic quotient singularities. As an application, we show, under some assumptions, that the orbifold Hecke algebra of a complex global quotient orbifold [X/G][X/G] is isomorphic to the degree 00 cohomology of the AA_\infty-algebra of endomorphisms of a regular cotangent fiber T[x][X/G]T_{[x]}^*[X/G] regarded as an object of the bulk-deformed wrapped Fukaya category of the orbifold T[X/G]T^*[X/G] for a compact complex manifold XX and finite group GAut(X)G \subset \operatorname{Aut}(X).

Keywords

Cite

@article{arxiv.2607.11572,
  title  = {Obstructions to smoothing orbicurves and Orbifold Hecke algebras},
  author = {Ko Honda and Roman Krutowski and Yin Tian and Tianyu Yuan},
  journal= {arXiv preprint arXiv:2607.11572},
  year   = {2026}
}

Comments

80 pages, 6 figures. Comments are welcome!