English

Category $\mathcal{O}$ for hybrid quantum groups and non-commutative Springer resolutions

Representation Theory 2026-02-10 v4 Quantum Algebra

Abstract

The hybrid quantum group was firstly introduced by Gaitsgory, whose category O\mathcal{O} can be viewed as a quantum analogue of BGG category O\mathcal{O}. We give a coherent model for its principal block at roots of unity, using the non-commutative Springer resolution defined by Bezrukavnikov--Mirkovi\'{c}. In particular, the principal block is derived equivalent to the affine Hecke category. As an application, we endow the principal block with a canonical grading, and show that the graded multiplicity of simple module in Verma module is given by the generic Kazhdan--Lusztig polynomial.

Keywords

Cite

@article{arxiv.2308.07028,
  title  = {Category $\mathcal{O}$ for hybrid quantum groups and non-commutative Springer resolutions},
  author = {Quan Situ},
  journal= {arXiv preprint arXiv:2308.07028},
  year   = {2026}
}

Comments

52 pages, final version

R2 v1 2026-06-28T11:54:58.427Z