English

D-convolution categories and Hopf algebras

Representation Theory 2026-01-15 v2 Mathematical Physics math.MP Rings and Algebras

Abstract

For a smooth affine algebraic group GG, one can attach various D-module categories to it that admit convolution monoidal structure. We consider the derived category of D-modules on GG, the stack G/GadG/G_{ad} and the category of Harish-Chandra bimodules. Combining the work of Beilinson-Drinfeld on D-modules and Hecke patterns with the recent work of the author with Dimofte and Py, we show that each of the above categories (more precisely the equivariant version) is monoidal equivalent to a localization of the DG category of modules of a graded Hopf algebra. As a consequence, we give an explicit braided monoidal structure to the derived category of D-modules on G/GadG/G_{ad}, which when restricted to the heart, recovers the braiding of Bezrukavnikov-Finkelberg-Ostrik.

Keywords

Cite

@article{arxiv.2504.10605,
  title  = {D-convolution categories and Hopf algebras},
  author = {Wenjun Niu},
  journal= {arXiv preprint arXiv:2504.10605},
  year   = {2026}
}

Comments

Minor updates; accepted version for Journal of Algebra and its Applications

R2 v1 2026-06-28T22:58:14.456Z