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Faisceaux analytiques semi-cohérents

Jean Merrien — 1980

Annales de l'institut Fourier

Nous définissons deux notions nouvelles en géométrie analytique réelle, celle de fonction Nash-analytique et celle de faisceau semi-cohérent. Avec ces notions, nous obtenons des théorèmes de cohérence analogues à ceux du cas complexe (théorème de cohérence d’Oka, théorème de l’image directe, cohérence d’un ensemble analytique complexe).

Idéaux de fonctions différentiables. II

Jean-Claude TougeronJean Merrien — 1970

Annales de l'institut Fourier

B. Malgrange a montré que l’idéal engendré par un ensemble fini de fonctions analytiques dans l’algèbre des fonctions de classe C sur un ouvert de R n est fermé. Par des techniques assez différentes de celles de B. Malgrange, nous étudions des propriétés de ce type, reliant l’analytique et le différentiable. Plus précisément, si E n (resp. A n ) désigne des germes de fonctions de classe C (resp. analytiques) au voisinage de l’origine de R n , et θ une fonction de classe C de R n dans R p , nous étudions,...

Interpolants d'Hermite obtenus par subdivision

Jean-Louis Merrien — 2010

ESAIM: Mathematical Modelling and Numerical Analysis

We propose a two point subdivision scheme with parameters to draw curves that satisfy Hermite conditions at both ends of . We build three functions and on dyadic numbers and, using infinite products of matrices, we prove that, under assumptions on the parameters, these functions can be extended by continuity on , with and .

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