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Displaying similar documents to “Ensembles de non synthèse pour certains poids dissymétriques sur la droite”

Approximation of holomorphic functions of infinitely many variables II

László Lempert (2000)

Annales de l'institut Fourier

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Let X be a Banach space and B ( R ) ⊂ X the ball of radius R centered at 0 . Can any holomorphic function on B ( R ) be approximated by entire functions, uniformly on smaller balls B ( r ) ? We answer this question in the affirmative for a large class of Banach spaces.

A special type of triangulations in numerical nonlinear analysis.

J. M. Soriano (1990)

Collectanea Mathematica

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To calculate the zeros of a map f : Rn → Rn we consider the class of triangulations of Rn so that a certain point belongs to a simplex of fixed diameter and dimension. In this paper two types of this new class of triangulations are constructed and shown to be useful to calculate zeros of piecewise linear approximations of f.

Sous-espaces biinvariants pour certains shifts pondérés

O. El-Fallah, Karim Kellay (1998)

Annales de l'institut Fourier

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Nous étudions les sous-espaces biinvariants du shift usuel sur les espaces à poids L ω 2 = f ∈ L 2 ( 𝕋 ) : ∥ f ∥ ω = ∑ n ∈ ℤ | f ( n ) | ω 2 ( n ) 1 / 2 < + ∞ , où ω ( n ) = ( 1 + n ) p , n ≥ 0 et ω ( n ) ( 1 + | n | ) p n → - ∞ → + ∞ , pour un certain entier p ≥ 1 . Nous montrons que la trace analytique de tout sous-espace biinvariant est de type spectral, lorsque ∑ n ≥ 2 1 n log ω ( - n ) diverge, mais que ceci n’est plus valable lorsque ∑ n ≥ 2 1 n log ω ( - n ) converge.