A short proof of the technical theorem underlying G. G. Kasparov's KK-theory is presented. The theorem is concerned with the separation of two orthogonal subalgebras of an "outer multiplier algebra" M(D) D by an element in a relative commutant. The proof given here is a simple application of the notion of quasicentral approximate unit.
|Original language||English (US)|
|Number of pages||6|
|Journal||Journal of Functional Analysis|
|State||Published - Jul 1987|
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