Idéaux fermés de fonctions (fin)
Ideáux fermés d'une algèbre de Beurling régulière.
The structure of closed ideals of a regular algebra containing the classical A∞ is considered. Several division and approximation results are proved and a characterization of those ideals whose intersection with A∞ is not {0} is obtained. A complete description of the ideals with countable hull is given, with applications to synthesis of hyperfunctions.
Idempotent States and the Inner Linearity Property
We find an analytic formulation of the notion of Hopf image, in terms of the associated idempotent state. More precisely, if π:A → Mₙ(ℂ) is a finite-dimensional representation of a Hopf C*-algebra, we prove that the idempotent state associated to its Hopf image A' must be the convolution Cesàro limit of the linear functional φ = tr ∘ π. We then discuss some consequences of this result, notably to inner linearity questions.
Idempotents dans les algèbres de Banach
Using the holomorphic functional calculus we give a characterization of idempotent elements commuting with a given element in a Banach algebra.
Idempotents in quotients and restrictions of Banach algebras of functions
Let be the Beurling algebra with weight on the unit circle and, for a closed set , let . We prove that, for , there exists a closed set of measure zero such that the quotient algebra is not generated by its idempotents, thus contrasting a result of Zouakia. Furthermore, for the Lipschitz algebras and the algebra of absolutely continuous functions on , we characterize the closed sets for which the restriction algebras and are generated by their idempotents.
Idempotents of Fourier Multiplier Algebra.
Identification and estimation of parameters in abstract Cauchy problems.
Identification of the support for the generalized functions.
If E' has the Metric Approximation Property then so Does (E, E').
Image d'un homomorphisme et flot des poids d'une relation d'Équivalence mesurée.
Images of some functions and functional spaces under the Dunkl-Hermite semigroup
We propose the study of some questions related to the Dunkl-Hermite semigroup. Essentially, we characterize the images of the Dunkl-Hermite-Sobolev space, and , , under the Dunkl-Hermite semigroup. Also, we consider the image of the space of tempered distributions and we give Paley-Wiener type theorems for the transforms given by the Dunkl-Hermite semigroup.
Imbedding of Power Series Spaces and Spaces of Analytic Functions.
Imbedding theorems for spaces of functions of a denumberable number of variables and their applications.
Imbedding theorems of Sobolev spaces into Lorentz spaces
In questo articolo vengono date alcune varianti del teorema di immersione di Sobolev in spazi di Lorentz. In particolare si dimostra un teorema di immersione per spazi di Sobolev anisotropi supponendo che le derivate parziali appartengono a spazi di Lorentz diversi, anche nel caso limite, corrispondente all’estensione di Brezis-Wainger del teorema di Trudinger per .
Imbedding theorems of Sobolev type in potential theory.
Imbeddings between weighted Orlicz-Lorentz spaces.
Immersion des espaces de Sobolev généralisés (de type Orlicz ou à poids) dans des espaces de fonctions continues
Impact of the variations of the mixing length in a first order turbulent closure system
This paper is devoted to the study of a turbulent circulation model. Equations are derived from the “Navier-Stokes turbulent kinetic energy” system. Some simplifications are performed but attention is focused on non linearities linked to turbulent eddy viscosity . The mixing length acts as a parameter which controls the turbulent part in . The main theoretical results that we have obtained concern the uniqueness of the solution for bounded eddy viscosities and small values of and its asymptotic...
Impact of the variations of the mixing length in a first order turbulent closure system
This paper is devoted to the study of a turbulent circulation model. Equations are derived from the “Navier-Stokes turbulent kinetic energy” system. Some simplifications are performed but attention is focused on non linearities linked to turbulent eddy viscosity . The mixing length acts as a parameter which controls the turbulent part in . The main theoretical results that we have obtained concern the uniqueness of the solution for bounded eddy viscosities and small values of and its asymptotic...
Implementation canonique pour les co-actions d'un groupe localement compact et les systèmes dynamiques generalises.