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Algebra Seminar

Monday, February 13, 2017 - 3:15pm

Michael Wibmer

University of Pennsylvania


University of Pennsylvania

DRL 4N30

We introduce a cohomology set for difference algebraic groups and show that it classifies torsors. Bases on this result we can explicitly describe all torsors for a large class of difference algebraic groups. This has applications in the Galois theory of differential equations. (Joint work with Annette Bachmayr)