Double affine Hecke algebras and 2-dimensional local fields
M. Kapranov
Abstract
We give an interpretation of the double affine Hecke algebra of Cherednik as the (suitably regularized) algebra of double cosets of a group G by a subgroup J, extending the well known interpretations of finite and affine Hecke algebras. In this interpretation, G consists of K-points of a split reductive group where K is a 2-dimensional local field such as Qp((t)) or Fq((t1))((t2)), and J is a certain analog of the Iwahori subgroup.
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