2005/01/26 by Vladimir Manuilov, Klaus Thomsen, Manuilov, Vladimir +1
Mathematics · #46L80 #FOS: Mathematics #Operator Algebras (math.OA) #math.OA #msc:46L80
paper · pdf · doi:10.48550/arxiv.math/0501472
LaTeX, 6 pages
arxiv created 2005/01/26 · arxiv updated 2009/12/01
Let A and B be separable C^*-algebras, A unital and B stable. It is shown that there is a natural six-terms exact sequence which relates the group which arises by considering all semi-split extensions of A by B to the group which arises by restricting the attention to unital semi-split extensions of A by B. The six-terms exact sequence is an unpublished result of G. Skandalis.