Joachim Cuntz

collaborators

2 papers

math.OA2025

Split exactness, operator homotopy and stable uniqueness in KK

Joachim Cuntz

We develop important properties of the KK-functor on the basis of split exactness. In particular we discuss two slightly different short proofs for the existence of the Kasparov pr…

math.KT2024

Generalized homomorphisms and KK with extra structure

Joachim Cuntz, James Gabe

We develop the approach via quasihomomorphisms and the universal algebra $q A$ to Kasparov's $K K$ -theory, so as to cover versions of $K K$ such as $K K^{n u c}$ , $K K^{G}$ and ideal relate…