English

Miraculous cancellations for quantum $SL_2$

Quantum Algebra 2021-01-19 v2 Geometric Topology

Abstract

In earlier work, Helen Wong and the author discovered certain "miraculous cancellations" for the quantum trace map connecting the Kauffman bracket skein algebra of a surface to its quantum Teichmueller space, occurring when the quantum parameter qq is a root of unity. The current paper is devoted to giving a more representation theoretic interpretation of this phenomenon, in terms of the quantum group Uq(sl2)U_q(sl_2) and its dual Hopf algebra SL2qSL_2^q.

Keywords

Cite

@article{arxiv.1708.07617,
  title  = {Miraculous cancellations for quantum $SL_2$},
  author = {Francis Bonahon},
  journal= {arXiv preprint arXiv:1708.07617},
  year   = {2021}
}

Comments

26 pages. Version 2: minor revisions prior to submission

R2 v1 2026-06-22T21:23:16.186Z