Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Thom, Andreas Prof. Dr."
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On Turing machines, groupoids, and Atiyha problem
(2011-03-17)Turing dynamical system, an abstract version of a Turing machine, is defined and investigated using groupoids. The main presented application is to the Atiyah problem in group theory. ... -
Twisted K-theory with coefficients in a C*-algebra and obstructions against positive scalar curvature metrics
(2010-03-17)We introduce the notion of twisted Hilbert A-module bundles to construct a geometric realization of twisted K-theory with coefficients in a C*-algebra A. Like ordinary bundles of Hilbert ... -
Reduktionssysteme zur Berechnung einer Auflösung der orthogonalen freien Quantengruppen A<sub>o</sub>(n)
(2008-07-29)For the free orthogonal quantum groups Ao(n) we give and verify a complete reduction system. In case of n = 2 we give a finite automat to find every basis element.Futhermore we give a basis ...