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Algebra Seminar

Monday, January 28, 2019 - 3:15pm

Michael Wibmer

University of Notre Dame


University of Pennsylvania

DRL 4N30

The absolute Galois group of the field of rational functions over an algebraically closed field is a free profinite group. Motivated by the quest for a similar statement for the absolute differential Galois group we introduce free proalgebraic groups and characterize them in terms of embedding problems. Joint work with A. Bachmayr, J. Hartmann and D. Harbater.