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• #### Groups with Spanier-Whitehead Duality ﻿

[OWP-2019-23] (Mathematisches Forschungsinstitut Oberwolfach, 2019-09-17)
We introduce the notion of Spanier-Whitehead $K$-duality for a discrete group $G$, defined as duality in the KK-category between two $C*$-algebras which are naturally attached to the group, namely the reduced group ...
• #### K-Theory for Group C*-Algebras and Semigroup C*-Algebras ﻿

[OWS-47] (Birkhäuser Basel, 2017)
This book gives an account of the necessary background for group algebras and crossed products for actions of a group or a semigroup on a space and reports on some very recently developed techniques with applications to ...