A characterization of<i>KK</i>-theory
A characterization of<i>KK</i>-theory
We characterize the KK-groups of G. G. Kasparov, along with the Kasparov product KK(A, B) X KK(B, C) -> KK(A, C), from the point of view of category theory (in a very elementary sense): the product is regarded as a law of composition in a category and we show that …