Trigonometric Degeneration and Orbifold Wess-Zumino-Witten Model. II
arXiv:math/0312138 · doi:10.1142/S0217751X04020555
Abstract
The sheaves of conformal blocks and conformal coinvariants of the twisted WZW model have a factorisation property and are locally free even at the boundary of the moduli space, where the elliptic KZ equations and the Baxter-Belavin elliptic r matrix degenerate to the trigonometric KZ equations and the trigonometric r matrix,o respectively. Etingof's construction of the elliptic KZ equations is geometrically interpreted.
22 pages, 1 figure (psfrag.sty used), contribution to the Proceedings of "Infinite Dimensional Algebras and Integrable Systems", Faro, Portugal, on July 2003; ver. 2, typos corrected, references updated