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SUMMARY:Relative commutator theory and the associator of loops - Tim Van d
 er Linden\, University of Coimbra
DTSTART:20091110T141500Z
DTEND:20091110T154500Z
UID:TALK20778@talks.cam.ac.uk
CONTACT:Julia Goedecke
DESCRIPTION:joint work with Tomas Everaert\n\nThe aim of this talk is to e
 xplain the concept of double central extension from the point of view of r
 elative commutator theory. We shall focus on one concrete situation: the r
 eflection of loops to groups. First we explain how the Galois theoretic ap
 proach to relative commutators arose out of Tomas Everaert's work in the c
 ontext of Omega-groups. Then we show how the abstract definition applies t
 o the case of loops\, where the associator is an example of a relative com
 mutator.\n\n
LOCATION:MR9\, Centre for Mathematical Sciences
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