A universal, non-commutative C*-algebra associated to the Hecke algebra of double cosets

Details A universal, non-commutative C*-algebra associated to the Hecke algebra of double cosets A universal, non-commutative C*-algebra associated to the Hecke algebra of double cosets

2010-08-05

arxiv.org/abs/1008.1008v2

Mathematics

Operator Algebras

10 pages

Scientific paper

Let G be a discrete group and $\Gamma$ an almost normal subgroup. The operation of cosets concatanation extended by linearity gives rise to an operator system that is embeddable in a natural C* algebra. The Hecke algebra naturally embeds as a diagonal of the tensor product of this algebra with its opposite. When represented on the $l^2$ space of the group, by left and right convolution operators, this representation gives rise to abstract Hecke operators that in the modular group case, are unitarily equivalent to the classical operators on Maass wave forms

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