$K$-continuity is equivalent to $K$-exactness

Abstract

It is well known that the functor of taking the minimal tensor product with a fixed $C^*$-algebra preserves inductive limits if and only if it preserves extensions. In other words, tensor continuity is equivalent to tensor exactness. We consider a $K$-theoretic analogue of this result and show that $K$-continuity is equivalent to $K$-exactness, using a result of M. Dadarlat.