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Motivated by a renewed interest for the “additive dilogarithm” appeared recently, the purpose of this paper is to complete calculations on the tangent complex to the Bloch-Suslin complex, initiated a long time ago and which were motivated at the time by scissors congruence of polyedra and homology of . The tangent complex to the trilogarithmic complex of Goncharov is also considered.
We classify those smooth (n-1)-folds in G(1,Pn) for which the restriction of the rank-(n-1) universal bundle has more than n+1 independent sections. As an application, we classify also those (n-1)-folds for which that bundle splits.
Je démontre des théorèmes d’annulation de la cohomologie de Dolbeault de fibrés vectoriels amples sur une variété projective lisse, munis d’une forme symplectique ou d’une forme quadratique non-dégénérée à valeurs dans un fibré en droites. L’hypothèse d’existence d’une telle forme permet d’améliorer les résultats similaires précédents. Je fais aussi des remarques sur la cohomologie des fibrés en droites sur les grassmanniennes isotropes.
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