Fusion and convolution: applications to affine Kac-Moody algebras at the critical level

Details Fusion and convolution: applications to affine Kac-Moody algebras at the critical level Fusion and convolution: applications to affine Kac-Moody algebras at the critical level

2005-11-11

arxiv.org/abs/math/0511284v2

Mathematics

Representation Theory

43 pages

Scientific paper

Let g be a semi-simple Lie algebra, and let g^ be the corresponding affine Kac-Moody algebra. Consider the category of g^-modules at the critical level, on which the action of the Iwahori subalgebra integrates to algebraic action of the Iwahori subgroup I. We study the action on this category of the convolution functors with the "central" sheaves on the affine flag scheme G((t))/I. We show that each object of our category is an "eigen-module" with respect to these functors. In order to prove this, we use the fusion product of modules over the affine Kac-Moody algebra.

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