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shupp_01

Prof. Dr. Ralf Meyer, Universität Göttingen; Vortrag: Crossed modules as symmetries in noncommutative geometry.

Donnerstag, 25.04.2013 16:30 im Raum M5
Mathematik und Informatik

Abstract: The automorphism group of a C*-algebra can be enriched to a crossed module taking into account that inner automorphisms are more trivial than general automorphisms. I give some examples how crossed modules act on C*-algebras and then examine the case of Abelian crossed modules. I generalise Takesaki-Takai duality to a duality between actions of an Abelian crossed module an actions of a groupoid. If time permits, I show how to decompose any crossed module of Lie groups into an extension of an ordinary Lie group by Abelian crossed modules.



Angelegt am Freitag, 12.04.2013 10:01 von shupp_01
Geändert am Freitag, 26.04.2013 11:31 von wuebbel
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Kolloquium Wilhelm Killing