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Moduli of principal bundles and the wonderful compactification

Michael Thaddeus
(Columbia University, USA)
Seminar
Wednesday, 26 May, 2010, at 15:45-16:45, in Aud. D3 (1531-215)
Abstract:

I will describe ongoing joint work with Johan Martens about moduli spaces of principal bundles, with reductive structure group, on a twice-punctured curve of genus zero.

I will explain how they can be used to construct the wonderful compactification of the group in the sense of De Concini-Procesi if the group has trivial center.

Furthermore, if the group has nontrivial center, we get a new compactification which is a smooth Deligne-Mumford stack.

Note:

Before this seminar there will be coffee and cake outside the seminar room

Organised by: CTQM/QGM
Contact person: Jørgen Ellegaard Andersen