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The geometry of some generalized affine Springer fibers

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arxiv 1710.11243 v3 pith:LR3X2TXQ submitted 2017-10-30 math.AG math.NTmath.RT

classification math.AGmath.NTmath.RT
keywords affinefibersgroupspringerconjecturesomealgebraanalogue
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abstract

We study basic geometric properties of some group analogue of affine Springer fibers and compare with the classical Lie algebra affine Springer fibers. The main purpose is to formulate a conjecture that relates the number of irreducible components of such varieties for a reductive group $G$ to certain weight multiplicities defined by the Langlands dual group $\hat{G}$. We prove our conjecture in the case of unramified conjugacy class.

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