Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines math.RT
Date Vendredi 24 Mai 2013
Heure 11:00
Salle 2017
Nom de l'orateur Cherednik
Prenom de l'orateur Ivan
Addresse email de l'orateur
Institution de l'orateur University of North Carolina
Titre DAHA-symmetrizers and affine Satake isomorpisms.
Résumé Almost every specialist in modern representation theory and related geometry faced the problem of dealing with the affine symmetrizer, the one defined for the affiine Weyl group or its deformation in terms of the corresponding affine Hecke algebra. Its action in DAHA modules appeared a surprisingly deep theory. The classical p-adic spherical functions, the Hall polynomials, the Kac-Moody characters and the affine Demazure characters are among special cases of this new theory. The key results are the proportionality of the DAHA symmetrizer to the Satake map and the clasification of the DAHA coinvariants of higher levels. The level-one case is directly related to the theory of q-analogs of Mehta-Macdonald integrals with many important aspects in the range from the strong Macdonald conjecture (Fishel, Grojnowski, Teleman) to the theory of global spherical functions, one of the main applications of DAHA so far.
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