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Compactification of Deligne-Lusztig varieties

Friday 26th June 2009 - 14:00 to 15:00
INI Seminar Room 1
Joint work with Raphaël Rouquier: we give an explicit construction of the normalization of the Bott-Samelson-Demazure compactification of Deligne-Lusztig varieties in their classical étale covering (with a finite torus as Galois group). We retrieve an old result of Deligne and Lusztig about the local monodromy around the divisors of this compactification.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons