English

Combinatorics of the $\hat{sl_2}$ spaces of coinvariants II

Quantum Algebra 2007-05-23 v2 Representation Theory

Abstract

The spaces of coinvariants are quotient spaces of integrable sl2^\hat{sl_2} modules by subspaces generated by actions of certain subalgebras labeled by a set of points on a complex line. When all the points are distinct, the spaces of coinvariants essentially coincide with the spaces of conformal blocks in the WZW conformal field theory and their dimensions are given by the Verlinde rule. We describe monomial bases for the \wsl\wsl spaces of coinvariants, In particular, we prove that the spaces of coinvariants have the same dimensions when all the points coincide. We establish recursive relations satisfied by the monomial bases and the corresponding characters of the spaces of coinvariants. For the proof we use filtrations of the sl^2\hat{\mathfrak{sl}}_2 modules, and further filtrations on the adjoint graded spaces for the first filtrations. This paper is the continuation of [FKLMM].

Keywords

Cite

@article{arxiv.math/0009198,
  title  = {Combinatorics of the $\hat{sl_2}$ spaces of coinvariants II},
  author = {B. Feigin and R. Kedem and S. Loktev and T. Miwa and E. Mukhin},
  journal= {arXiv preprint arXiv:math/0009198},
  year   = {2007}
}

Comments

44 pages