English

Exact module categories over $\mathrm{Rep}(u_q(\mathfrak{sl}_2))$

Quantum Algebra 2025-03-28 v1 Category Theory Representation Theory

Abstract

We give a complete list of indecomposable exact module categories over the finite tensor category Rep(uq(sl2))\mathrm{Rep}(u_q(\mathfrak{sl}_2)) of representations of the small quantum group uq(sl2)u_q(\mathfrak{sl}_2), where qq is a root of unity of odd order. Each of them is given as the category of representations of a left comodule algebra over uq(sl2)u_q(\mathfrak{sl}_2) explicitly presented by generators and relations.

Keywords

Cite

@article{arxiv.2503.21265,
  title  = {Exact module categories over $\mathrm{Rep}(u_q(\mathfrak{sl}_2))$},
  author = {Daisuke Nakamura and Taiki Shibata and Kenichi Shimizu},
  journal= {arXiv preprint arXiv:2503.21265},
  year   = {2025}
}

Comments

49 pages

R2 v1 2026-06-28T22:36:21.243Z