MATH Seminar
| Title: The Rost invariant for groups of type $A$ |
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| Seminar: Algebra and Number Theory |
| Speaker: Anne Queguiner-Mathieu of Paris XIII and Paris-Est |
| Contact: R. Parimala, parimala@mathcs.emory.edu |
| Date: 2011-10-25 at 3:00PM |
| Venue: MSC E406 |
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| Abstract: We discuss an invariant due to Rost for torsors under simple simply connected groups with values in degree three Galois cohomology. We will explain how one can provide an exact formula to compute the Rost invariant of a torsor under the group $SL_1(A)$ of norm 1 elements in a central simple algebra. This talk is based on a joint work with Philippe Gille. |
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