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Sequences of algebraic integers and density modulo  1

Roman Urban (2007)

Journal de Théorie des Nombres de Bordeaux

We prove density modulo 1 of the sets of the form { μ m λ n ξ + r m : n , m } , where λ , μ is a pair of rationally independent algebraic integers of degree d 2 , satisfying some additional assumptions, ξ 0 , and r m is any sequence of real numbers.

Solution des problèmes de Favard

Michel Langevin (1988)

Annales de l'institut Fourier

Pour tout c < 2 , on calcule un rang D ( c ) tel que tout entier algébrique x de degré au moins D ( c ) ait deux conjugués x ' , x ' ' vérifiant | x ' - x ' ' | c . De plus, on donne une nouvelle preuve de l’égalité D ( 3 ) = 2 .

Steinitz classes of some abelian and nonabelian extensions of even degree

Alessandro Cobbe (2010)

Journal de Théorie des Nombres de Bordeaux

The Steinitz class of a number field extension K / k is an ideal class in the ring of integers 𝒪 k of k , which, together with the degree [ K : k ] of the extension determines the 𝒪 k -module structure of 𝒪 K . We denote by R t ( k , G ) the set of classes which are Steinitz classes of a tamely ramified G -extension of k . We will say that those classes are realizable for the group G ; it is conjectured that the set of realizable classes is always a group.In this paper we will develop some of the ideas contained in [7] to obtain some...

Sur le groupe des unités de corps de nombres de degré 2 et 4

M’hammed Ziane (2007)

Journal de Théorie des Nombres de Bordeaux

Nous déterminons sous certaines hypothèses, un système fondamental d’unités du corps non pur K = ( ω ) et de son sous-corps quadratique, où ω est solution du polynôme f ( X ) = X 4 + d - 2 M 6 X 2 - M 4 , avec M 6 = D 6 + 6 D 4 d + 9 D 2 d 2 + 2 d 3 , M 4 = D 4 + 4 D 2 d + 2 d 2 , d | D , d , D , non nuls.

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