Each Non-Zero Convolution Operator on the Entire Functions Admits a Continuous Linear Right Inverse.
Eigenvalue distribution of integral operators defined by Besov-Orlicz kernels.
Ein starkes "Null-Zwei"-Gesetz in Lp.
Endpoint estimates for a class of Littlewood--Paley operators with nondoubling measures.
Entropy and Eigenvalues of Certain Integral Operators.
Errata to: Local Mappings on Spaces of Differentiable Functions [1].
Essential norm and a new characterization of weighted composition operators from weighted Bergman spaces and Hardy spaces into the Bloch space
In this paper, we give some estimates for the essential norm and a new characterization for the boundedness and compactness of weighted composition operators from weighted Bergman spaces and Hardy spaces to the Bloch space.
Essential norm of the difference of composition operators on Bloch space
Let and be holomorphic self-maps of the unit disk, and denote by , the induced composition operators. This paper gives some simple estimates of the essential norm for the difference of composition operators from Bloch spaces to Bloch spaces in the unit disk. Compactness of the difference is also characterized.
Essential norm of weighted composition operator between -Bloch space and -Bloch space in polydiscs.
Essential normality for certain finite linear combinations of linear-fractional composition operators on the Hardy space
In 1999 Nina Zorboska and in 2003 P. S. Bourdon, D. Levi, S. K. Narayan and J. H. Shapiro investigated the essentially normal composition operator , when is a linear-fractional self-map of . In this paper first, we investigate the essential normality problem for the operator on the Hardy space , where is a bounded measurable function on which is continuous at each point of , , and is the Toeplitz operator with symbol . Then we use these results and characterize the essentially normal...
Essential supremum norm differentiability.
Estimates for a class of integral operators and appli-cations to the ?-Neumann problem.
Estimates for the Bergman and Szegö projections in two symmetric domains of
Étude d'opérateurs quasi-compacts positifs. Applications aux opérateurs de transfert
Étude d'un problème de continuité lié à l'hypothèse de Riemann
Cet article est consacré à l’étude d’un problème lié au critère de Beurling Nyman sur l’hypothèse de Riemann. On y étudie la continuité de la projection de la fonction indicatrice de l’intervalle sur un sous-espace vectoriel variable de l’ensemble des fonctions dont le carré est intégrable sur la demi-droite réelle, engendré par des fonctions dilatées de la fonction partie fractionnaire. Plus généralement, étant un élément fixé d’un espace de Hilbert , on étudie l’application qui à un convexe...
Étude d’une transformation non uniformément hyperbolique de l’intervalle
Nous étudions un exemple de transformation non uniformément hyperbolique de l’intervalle . Des exemples analogues ont été étudiés par de nombreux auteurs. Notre méthode utilise une théorie spectrale, pour une classe d’opérateurs vérifiant des conditions faibles de Doeblin-Fortet, introduite dans [1]. Elle nous permet, en particulier, de donner une estimation de la vitesse de décroissance des corrélations pour des fonctions non höldériennes.
Exact values of Bernstein -widths for some classes of convolution functions.
Exact values of Bernstein -widths for some classes of periodic functions with formal self-adjoint linear differential operators.
Existence of solutions for nonlinear mixed type integrodifferential equation of second order.
Extended Cesàro operators from logarithmic-type spaces to Bloch-type spaces.