Module structure on U(h)U(\mathfrak{h}) for Kac-Moody algebras

preprint2016arXivOpen access

Abstract

Let $\g$ be an arbitrary Kac-Moody algebra with a Cartan sualgebra $\h$. In this paper, we determine the category of $\g$-modules that are free $U(\h)$-modules of rank 1.

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