2023
DOI: 10.5802/pmb.51
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Kummer theory for products of one-dimensional tori

Abstract: Let T be a finite product of one-dimensional tori defined over a number field K. We consider the torsion-Kummer extension K(T [nt], 1 n G), where n, t are positive integers and G is a finitely generated group of K-points on T . We show how to compute the degree of K(T [nt], 1 n G) over K and how to determine whether T is split over such an extension. If K = Q, then we may compute at once the degree of the above extensions for all n and t.Résumé. -(La théorie de Kummer pour les produits de tores de dimension un… Show more

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