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<dc:title xml:lang="fr">Relation de congruence pour les variétés de Shimura associées aux groupes unitaires GU (n-1,1)</dc:title>
<dcterms:alternative xml:lang="en">Congruence relation for Shimura varieties associated to unitary groups GU (n-1,1)</dcterms:alternative>
<dc:subject xml:lang="fr">Variétés de Shimura</dc:subject>
<dc:subject xml:lang="fr">Relation de congruence</dc:subject>
<dc:subject xml:lang="fr">Problème de modules</dc:subject>
<dc:subject xml:lang="fr">Isogénies</dc:subject>
<dc:subject xml:lang="fr">Variétés abéliennes</dc:subject>
<dc:subject xml:lang="fr">Cristaux de Dieudonné</dc:subject>
<dc:subject xml:lang="en">Cohomology of a Shimura variety</dc:subject>
<dc:subject xml:lang="en">Congruence relation</dc:subject>
<dc:subject xml:lang="en">Dieudonné crystals</dc:subject>
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<tef:elementdEntree autoriteExterne="027315428" autoriteSource="Sudoc">Théorie des graphes</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="034005420" autoriteSource="Sudoc">Treillis de congruences</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Blasius et Rogawski ont formulé une conjecture qui prévoit que l'action du Frobenius sur la cohomologie d'une variété de Shimura est annulée par un certain polynôme, à coefficients dans l'algèbre de Hecke. C'est l'analogue de la célèbre relation d'Eichler-Shimura pour la courbe modulaire. Dans cette thèse, on démontre cette conjecture pour les variétés de Shimura associées aux groupes unitaires en signature (n-1,1) quand n est impair. Par ailleurs, on étudie certains aspects dans le cas particulier n=3. On montre explicitement la relation de congruence sur le lieu ordinaire. De plus, on étudie le graphe des cristaux supersinguliers et les relèvements d'isogénies en caractéristique nulle.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Blasius and Rogawski have stated a conjecture saying that the action of the Frobenius element on the cohomology of a Shimura variety is annihilated by some polynomial with coefficients in the Hecke algebra. This is the analogue of the Eichler-Shimura congruence relation for the modular curve. In this thesis, we prove this conjecture for Shimura varieties associated to unitary groups in signature (n-1,1) when n is odd. We also investigate some particular aspects in the case n=3. We explicitely show the congruence relation on the ordinary locus. Further, we study the graph of supersingular Dieudonné crystals and liftings of isogenies to characteristic zero.</dcterms:abstract>
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