Jun 23 – 27, 2014
Université Lille 1
Europe/Paris timezone

Rings and images occurring from universal deformations of profinite groups

Jun 24, 2014, 9:00 AM
Salle de réunions (Université Lille 1)

Salle de réunions

Université Lille 1

U.M.R. CNRS 8524 U.F.R. de Mathématiques 59 655 Villeneuve d'Ascq Cédex
Représentations galoisiennes et formes modulaires Représentations galoisiennes et formes modulaires


Gebhard Boeckle (Heidelberg University)


Recently Dorobisz, Eardley-Manoharmayum and Manoharmayum have proved abstract results (a) on the shape of possible deformation rings and (b) on the image of universal deformations of profinite groups, for representations into GL_n. The result regarding (a) were motivated by questions of Bleher, Chinburg and de Smit. We place these results in an axiomatic framework that in principle applies to all reductive groups that are simple modulo their center. In this framework, we give alternative proofs of the above results. For the case GL_n we recover the results by Dorobisz, Eardley and Manoharmayum. For other cases, it remains to verify the stated axioms for these groups, for instance results on the first and second cohomology for the adjoint action of these groups. This is work in progress jointly with Sara Arias de Reyna.

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