Abstract

Nous etudions les groupes de cohomologies etales associes aux varietes abeliennes. Nous obtenons des conditions necessaires et suffisantes pour qu'une variete abelienne ait une reduction semistable (ou une reduction purement additive qui devient semistable sur une extension quadratique), en termes de l'action du groupe d'inertie absolu sur les groupes de cohomologies etales a coefficients finis.

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