The Chern-Connes Character for pseudodifferential operators on the sphere

Details The Chern-Connes Character for pseudodifferential operators on the sphere The Chern-Connes Character for pseudodifferential operators on the sphere

2011-12-09

arxiv.org/abs/1112.2148v1

Mathematics

Operator Algebras

Scientific paper

We compute the Chern-Connes character (a map from the $K$-theory of a C$^*$-algebra under the action of a Lie group to the cohomology of its Lie algebra) for the $L^2$-norm closure of the algebra of all classical zero-order pseudodifferential operators on the sphere under the canonical action of ${\rm SO}(3)$. We show that its image is $\mathbb{R}$ if the trace is the integral of the principal symbol.

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