Any flat bundle on a punctured disc has an oper structure

Details Any flat bundle on a punctured disc has an oper structure Any flat bundle on a punctured disc has an oper structure

2008-11-19

arxiv.org/abs/0811.3186v2

Mathematics

Representation Theory

12 pages

Scientific paper

We prove that any flat G-bundle, where G is a complex connected reductive algebraic group, on the punctured disc admits the structure of an oper. This result is important in the local geometric Langlands correspondence proposed in arXiv:math/0508382. Our proof uses certain deformations of the affine Springer fibers which could be of independent interest. As a byproduct, we construct representations of affine Weyl groups on the homology of these deformations generalizing representations constructed by Lusztig.

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