Some versions of Anderson's and Maher's inequalities. I.
Some versions of Anderson's and Maher's inequalities. II.
Some weak convergence theorems for a family of asymptotically nonexpansive nonself mappings.
Some weighted norm inequalities concerning the Schrödinger operators.
Some weighted sum and product inequalities in spaces and their applications.
Some -sequence spaces defined by a modulus
The main object of this paper is to introduce and study some sequence spaces which arise from the notation of generalized de la Vallée–Poussin means and the concept of a modulus function.
Somewhere dense Cesàro orbits and rotations of Cesàro hypercyclic operators
Let T be a continuous linear operator acting on a Banach space X. We examine whether certain fundamental results for hypercyclic operators are still valid in the Cesàro hypercyclicity setting. In particular, in connection with the somewhere dense orbit theorem of Bourdon and Feldman, we show that if for some vector x ∈ X the set Tx,T²/2 x,T³/3 x, ... is somewhere dense then for every 0 < ε < 1 the set (0,ε)Tx,T²/2 x,T³/3 x,... is dense in X. Inspired by a result of Feldman, we also prove...
Somme Ponctuelle D'operateurs Maximaux Monotones Pointwise Sum of two Maximal Monotone Operators
∗ Cette recherche a été partiellement subventionnée, en ce qui concerne le premier et le dernier auteur, par la bourse OTAN CRG 960360 et pour le second auteur par l’Action Intégrée 95/0849 entre les universités de Marrakech, Rabat et Montpellier.The primary goal of this paper is to shed some light on the maximality of the pointwise sum of two maximal monotone operators. The interesting purpose is to extend some recent results of Attouch, Moudafi and Riahi on the graph-convergence of maximal monotone...
Sottospazi invarianti per operatori lineari T-invarianti rispetto ad un gruppo di omeomorfismi
Theory of -invariant linear operators which was considered for a group of congruences [2], [3] is now extended to a group of homeomorphisms. An analysis is carried out in order to establish to what extent the main results of the previous theory still hold under the actual very general assumptions.
Sous-ellipticité d'opérateurs intégro-différentiels vérifiant le principe du maximum
Sous-espaces biinvariants pour certains shifts pondérés
Nous étudions les sous-espaces biinvariants du shift usuel sur les espaces à poidsoù et , pour un certain entier . Nous montrons que la trace analytique de tout sous-espace biinvariant est de type spectral, lorsque diverge, mais que ceci n’est plus valable lorsque converge.
Sous-espaces fermés de séries universelles sur un espace de Fréchet
We improve a result of Charpentier [Studia Math. 198 (2010)]. We prove that even on Fréchet spaces with a continuous norm, the existence of only one restrictively universal series implies the existence of a closed infinite-dimensional subspace of restrictively universal series.
Sous-espaces invariants dans les espaces de Banach
Sous-espaces invariants dans les espaces de Banach : quelques résultats positifs
Sous-espaces invariants de type fonctionnel dans les espaces de Banach
Sous-groupes distingues du groupe unitaire et du groupe général linéaire d'un espace de Hilbert quaternionien.
Sous-groupes distingués du groupe unitaire et du groupe général linéaire d'un espace de Hilbert
Sous-normalité jointe non bornée et applications
T. Trent gave a new characterization of subnormality for an operator on a Hilbert space. T. Bînzar and D. Păunescu generalized this condition to commuting triples of operators. Here, we give an n-variable unbounded version of the above results. Theorems of this kind have also been obtained by Z. J. Jabłoński and J. Stochel.
Spaces of Compact Operators.
Spaces of compact operators which are -ideals in .