Lundi 12 Septembre 2011
Discriminant and determinant of a hypersurface of even dimension The determinant of the cohomology of a smooth hypersurface of even dimension in a projective space defines a quadratic character of the absolute Galois group. The discriminant of a defining polynomial allows us to compute it once we determine the sign involved by testing the formula for the Fermat hypersurfaces. This is a joint work with J-P. Serre.
Les exposés auront lieu dans l'amphithéâtre Léon Motchane, IHÉS
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