Groupes vectoriels et schéma de Picard |
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Authors: | Michel Raynaud |
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Institution: | Université de Paris-Sud, UMR 8628 du CNRS, Mathématique, bâtiment 425, 91405 Orsay cedex, France |
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Abstract: | This Note contains slight variations on a well known theme: linear sub-groups of the Picard functor of a proper scheme over a field k. In particular, we give exemples of a field k, with positive characteristic, and a projective k-scheme X, normal, but not geometrically reduced, such that the neutral component of its Picard functor is representable by a nonzero vectorial group scheme. To cite this article: M. Raynaud, C. R. Acad. Sci. Paris, Ser. I 338 (2004). |
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