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Intégration des fonctions sous-analytiques et volumes des sous-ensembles sous-analytiques

Jean-Marie Lion, Jean-Philippe Rolin (1998)

Annales de l'institut Fourier

Soit f ( x , y ) une fonction sous-analytique de R n × R m à valeurs dans R + . Nous montrons que l’intégrale R m f ( x , y ) d y est une fonction log-analytique de x . Nous en déduisons que le volume k -dimensionnel des éléments Y x d’une famille sous-analytique de sous-ensembles sous-analytiques globaux de l’espace euclidien R m est une fonction log-analytique de x . Un corollaire de ce résultat est le caractère log-analytique de la fonction densité k -dimensionnelle d’un sous-analytique global de dimension k en tout point de sa fermeture topologique....

Internal characteristics of domains in ℂⁿ

Vyacheslav Zakharyuta (2014)

Annales Polonici Mathematici

This paper is devoted to internal capacity characteristics of a domain D ⊂ ℂⁿ, relative to a point a ∈ D, which have their origin in the notion of the conformal radius of a simply connected plane domain relative to a point. Our main goal is to study the internal Chebyshev constants and transfinite diameters for a domain D ⊂ ℂⁿ and its boundary ∂D relative to a point a ∈ D in the spirit of the author's article [Math. USSR-Sb. 25 (1975), 350-364], where similar characteristics have been investigated...

Interpolating sequences, Carleson measures and Wirtinger inequality

Eric Amar (2008)

Annales Polonici Mathematici

Let S be a sequence of points in the unit ball of ℂⁿ which is separated for the hyperbolic distance and contained in the zero set of a Nevanlinna function. We prove that the associated measure μ S : = a S ( 1 - | a | ² ) δ a is bounded, by use of the Wirtinger inequality. Conversely, if X is an analytic subset of such that any δ -separated sequence S has its associated measure μ S bounded by C/δⁿ, then X is the zero set of a function in the Nevanlinna class of . As an easy consequence, we prove that if S is a dual bounded sequence...

Interpolating varieties for weighted spaces of entire functions in Cn.

Carlos A. Berenstein, Qin Li Bao (1994)

Publicacions Matemàtiques

We prove in this paper that a given discrete variety V in Cn is an interpolating variety for a weight p if and only if V is a subset of the variety {ξ ∈ Cn: f1(ξ) = f2(ξ) = ... = fn(ξ) = 0} of m functions f1, ..., fm in the weighted space the sum of whose directional derivatives in absolute value is not less than ε exp(-Cp(ζ)), ζ ∈ V for some constants ε, C > 0. The necessary and sufficient conditions will be also given in terms of the Jacobian matrix of f1, ..., fm. As a corollary, we solve...

Interpolation d'opérateurs entre espaces de fonctions holomorphes

Patrice Lassere (1991)

Annales Polonici Mathematici

Let K be a compact subset of an hyperconvex open set D n , forming with D a Runge pair and such that the extremal p.s.h. function ω(·,K,D) is continuous. Let H(D) and H(K) be the spaces of holomorphic functions respectively on D and K equipped with their usual topologies. The main result of this paper contains as a particular case the following statement: if T is a continuous linear map of H(K) into H(K) whose restriction to H(D) is continuous into H(D), then the restriction of T to H ( D α ) is a continuous...

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