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Совместный общематематический семинар СПбГУ и Пекинского Университета
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Morava V. A. Petrov Saint Petersburg State University |
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Аннотация: A principal homogeneous bundle under the action of a simple algebraic group determines invariants in the Brauer group called Tits algebras. In the case when the group is simply connected these invariants are trivial, but one can define a higher degree invariant called the Rost invariant. It follows from a result by I. Panin that the motives of full flag varieties with coefficients in the Grothendieck group Язык доклада: английский |