Abstract
Paschke duality identifies the K-homology of a space X with the K-theory of a certain dual C*-algebra. We show that Paschke's dual algebra is in a natural way the algebra of sections of a certain sheaf of C*-algebras over X, which can be thought of as a sheaf of noncommutative symbols. This conceptually simplifies a number of constructions in K-homology, such as the association of a homology class to an elliptic operator and the construction of assembly maps.
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