Configuration Spaces: Geometry, Combinatorics and Topology
timetable:
Fri 28 May, 18:00 - 19:00, Sala Conferenze Centro De Giorgi
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seminar: YOUNG SEMINAR: Homology of complex braid groups
speaker: Filippo Callegaro (Università di Pisa)abstract: I'll present some results of a work in progress in collaboration with Ivan Marin (Paris). We studied the braid groups associated to the re flection arrangements for complex re ection groups. For Coxeter groups there is a 1-to-1 correspondence with Artin groups. With complex re flection groups it happens that different re flection groups can give the same braid group and it is not always clear whether two complex braid groups are isomorphic. Homology can help to distinguish some of them, in particular for the infi nite family of type B(de, e, r) and we can prove some isomorphisms too, but still open problems remain.
timetable:
Fri 28 May, 18:00 - 19:00, Sala Conferenze Centro De Giorgi
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