English

Lagrangian Skeleta and Koszul Duality on Bionic Symplectic Varieties

Algebraic Geometry 2025-01-22 v2 Representation Theory Symplectic Geometry

Abstract

We consider the category of modules over sheaves of Deformation-Quantization (DQ) algebras on bionic symplectic varieties. These spaces are equipped with both an elliptic Gm\mathbb{G}_m-action and a Hamiltonian Gm\mathbb{G}_m-action, with finitely many fixed points. On these spaces one can consider geometric category O\mathcal{O}: the category of (holonomic) modules supported on the Lagrangian attracting set of the Hamiltonian action. We show that there exists a local generator in geometric category O\mathcal{O} whose dg endomorphism ring, cohomologically supported on the Lagrangian attracting set, is derived equivalent to the category of all DQ-modules. This is a version of Koszul duality generalizing the equivalence between D-modules on a smooth variety and dg-modules over the de Rham complex.

Keywords

Cite

@article{arxiv.2407.13286,
  title  = {Lagrangian Skeleta and Koszul Duality on Bionic Symplectic Varieties},
  author = {Gwyn Bellamy and Christopher Dodd and Kevin McGerty and Thomas Nevins},
  journal= {arXiv preprint arXiv:2407.13286},
  year   = {2025}
}

Comments

Revision based on reviewer's comments. No changes to main results