On the endomorphisms of Weyl modules over affine Kac-Moody algebras at the critical level

Details On the endomorphisms of Weyl modules over affine Kac-Moody algebras at the critical level On the endomorphisms of Weyl modules over affine Kac-Moody algebras at the critical level

2008-02-26

arxiv.org/abs/0802.3872v2

Mathematics

Quantum Algebra

9 pages

Scientific paper

10.1007/s11005-009-0308-5

We present an independent short proof of the main result of arXiv:0706.3725 that the algebra of endomorphisms of a Weyl module of critical level is isomorphic to the algebra of functions on the space of monodromy-free opers on the disc with regular singularity and residue determined by the highest weight of the Weyl module. We derive this from the results of arXiv:0712.1183 about the shift of argument subalgebras.

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