On Graded K-theory, Elliptic Operators and the Functional Calculus

Details On Graded K-theory, Elliptic Operators and the Functional Calculus On Graded K-theory, Elliptic Operators and the Functional Calculus

1999-06-15

arxiv.org/abs/math/9906106v2

Illinois Journal of Mathematics, 44 No. 2 (Summer 2000) 294-309

Mathematics

Operator Algebras

14 pages texed

Scientific paper

Let $A$ be a graded C*-algebra. We characterize Kasparov's K-theory group $\hat{K}_0(A)$ in terms of graded *-homomorphisms by proving a general converse to the functional calculus theorem for self-adjoint regular operators on graded Hilbert modules. An application to the index theory of elliptic differential operators on smooth closed manifolds and asymptotic morphisms is discussed.

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