A Note on Kasparov Product and Duality

Abstract

Using Paschke-Higson duality, we can get a natural index pairing $K_{i}(A) \times K_{i+1}(D_Φ) \to \boldsymbol{Z} \quad (i=0,1) (\mbox{mod}2)$, where $A$ is a separable $C\sp*$-algebra, and $\Phi$ is a representation of $A$ on a separable infinite dimensional Hilbert space $H$. It is proved that this is a special case of the Kasparov Product. As a step, we show a proof of Bott-periodicity for KK-theory asserting that ${\mathbb{C}}_1$ and $S$ are $KK$-equivalent using the odd index pairing.

12 pages, The organization of the paper is changed with further additional contents for an expository style

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