Superlinear equations, potential theory and weighted norm inequalities
Superposition of functions in Sobolev spaces of fractional order. A survey
Superposition of imbeddings and Fefferman's inequality
In questo lavoro si studiano condizioni sufficienti sulla funzione peso , espresse in termini di integrabilità, per la validità della disuguaglianza dove denota una sfera in . Usando una tecnica di decomposizione di immersioni si dimostrano condizioni sufficienti in termini di appartenenza a spazi di Lebesgue, Lorentz-Orlicz e/o di tipo debole. Come applicazioni vengono fornite condizioni sufficienti per la proprietà forte di prolungamento unico per nelle dimensioni 2 e 3.
Superposition operator on the space of sequences almost converging to zero
We study the superposition operator f on on the space ac 0 of sequences almost converging to zero. Conditions are derived for which f has a representation of the form f x = a+bx +g x, for all x ∈ ac 0 with a = f 0, b ∈ D(ac 0), g a superposition operator from ℓ∞ into I(ac 0), D(ac 0) = {z: zx ∈ ac 0 for all x ∈ ac 0}, and I(ac 0) the maximal ideal in ac 0. If f is generated by a function f of a real variable, then f is linear. We consider the conditions for which a bounded function f generates f...
Superposition operators and functions of bounded p-variation.
We characterize the set of all functions f of R to itself such that the associated superposition operator Tf: g → f º g maps the class BVp1(R) into itself. Here BVp1(R), 1 ≤ p < ∞, denotes the set of primitives of functions of bounded p-variation, endowed with a suitable norm. It turns out that such an operator is always bounded and sublinear. Also, consequences for the boundedness of superposition operators defined on Besov spaces Bp,qs are discussed.
Superposition operators in the Lebesgue spaces and differentiability of quasiadditive set functions.
Superpositions of states and a representation theorem
Superreflexivity and -convexity of Banach spaces.
Supersets for the spectrum of elements in extended Banach algebras.
Superspaces of (s) with basis
Superstability for generalized module left derivations and generalized module derivations on a Banach module. II.
Superstability for generalized module left derivations and generalized module derivations on a Banach module. I.
Superstability of multipliers and ring derivations on Banach algebras.
Supersymmetric measures and maximum principles in the complex domain. Exponential decay of Green's functions
Supersymmetry algebras: extensions of orthgonal Lie algebras
Supertauberian operators and perturbations.
Upper semi-Fredholm operators and tauberian operators in Banach spaces admit the following perturbative characterizations [6], [2]: An operator T: X --> Y is upper semi-Fredholm (tauberian) if and only if for every compact operator K: X --> Y the kernel N(T+K) is finite dimensional (reflexive). In [7] Tacon introduces an intermediate class between upper semi-Fredholm operators and tauberian operators, the supertauberian operators, and he studies this class using non-standard analysis....
Supplement to the Paper of Lupas and Müller.
Support functionals and smoothness in Musielak-Orlicz sequence spaces endowed with the Luxemburg norm
Support functionals in Musielak-Orlicz sequence spaces endowed with the Luxemburg norm are completely characterized. An explicit formula for regular support functionals is given. For obtaining a characterization of singular support functionals a generalized Banach limit is applied. Some necessary and sufficient conditions for smooothness of these spaces are given, too.
Support functionals and their relation to the Radon-Nikodym property.
Support results via exceptional sets in Banach spaces