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Elliptic Central Characters and Blocks of Finite Dimensional Representations of Quantum Affine Algebras

Pavel I. Etingof·Adriano A. Moura
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Abstract

The category of finite dimensional (type 1) representations of a quantum affine algebra $U_q(\hat{\mathfrak g})$ is not semisimple. However, as any abelian category with finite-length objects, it admits a unique decomposition into a direct sum of indecomposable subcategorie (blocks). We define the elliptic central character of a finite dimensional (type 1) representation of $U_q(\hat{\mathfrak g})$. Then we show that the block decomposition of this category is paramentrized by these elliptic central characters.

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BibTeXRIS

Pavel I. Etingof, Adriano A. Moura. 2002-04-24. Elliptic Central Characters and Blocks of Finite Dimensional Representations of Quantum Affine Algebras. https://arxiv.org/abs/math/0204302

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