Generalized vector-valued sequence spaces defined by modulus functions.
Generalized weak peripheral multiplicativity in algebras of Lipschitz functions
Let (X, d X) and (Y,d Y) be pointed compact metric spaces with distinguished base points e X and e Y. The Banach algebra of all -valued Lipschitz functions on X - where is either‒or ℝ - that map the base point e X to 0 is denoted by Lip0(X). The peripheral range of a function f ∈ Lip0(X) is the set Ranµ(f) = f(x): |f(x)| = ‖f‖∞ of range values of maximum modulus. We prove that if T 1, T 2: Lip0(X) → Lip0(Y) and S 1, S 2: Lip0(X) → Lip0(X) are surjective mappings such that for all f, g ∈ Lip0(X),...
Generalized weighted Sobolev spaces and applications to Sobolev orthogonal polynomials: a survey.
Generalized weights for operator Lie algebras
Generalized Weyl-von Neumann Theorems (II).
Generalized-lush spaces and the Mazur-Ulam property
We introduce a new class of Banach spaces, called generalized-lush spaces (GL-spaces for short), which contains almost-CL-spaces, separable lush spaces (in particular, separable C-rich subspaces of C(K)), and even the two-dimensional space with hexagonal norm. We find that the space C(K,E) of vector-valued continuous functions is a GL-space whenever E is, and show that the set of GL-spaces is stable under c₀-, l₁- and -sums. As an application, we prove that the Mazur-Ulam property holds for a larger...
Generalizing normality for operators on Banach spaces: Hyponormality. I.
Generalizing the Johnson-Lindenstrauss lemma to k-dimensional affine subspaces
Let ε > 0 and 1 ≤ k ≤ n and let be affine subspaces of ℝⁿ, each of dimension at most k. Let if ε < 1, and m = O(k + log p/log(1 + ε)) if ε ≥ 1. We prove that there is a linear map such that for all 1 ≤ l ≤ p and we have ||x-y||₂ ≤ ||H(x)-H(y)||₂ ≤ (1+ε)||x-y||₂, i.e. the distance distortion is at most 1 + ε. The estimate on m is tight in terms of k and p whenever ε < 1, and is tight on ε,k,p whenever ε ≥ 1. We extend these results to embeddings into general normed spaces Y.
Generalizzazione di una proposizione di analisi funtoriale. Un'applicazione
Generation of analytic semigroups by elliptic operators of second order in Hölder spaces
Generation theory for semigroups of holomorphic mappings in Banach spaces.
Generators for algebras dense in -spaces
For various -spaces (1 ≤ p < ∞) we investigate the minimum number of complex-valued functions needed to generate an algebra dense in the space. The results depend crucially on the regularity imposed on the generators. For μ a positive regular Borel measure on a compact metric space there always exists a single bounded measurable function that generates an algebra dense in . For M a Riemannian manifold-with-boundary of finite volume there always exists a single continuous function that generates...
Generators of maximal left ideals in Banach algebras
In 1971, Grauert and Remmert proved that a commutative, complex, Noetherian Banach algebra is necessarily finite-dimensional. More precisely, they proved that a commutative, complex Banach algebra has finite dimension over ℂ whenever all the closed ideals in the algebra are (algebraically) finitely generated. In 1974, Sinclair and Tullo obtained a non-commutative version of this result. In 1978, Ferreira and Tomassini improved the result of Grauert and Remmert by showing that the statement...
Generators of the Boolean algebra of regular open sets in linear metric spaces
Generic differentiability of mappings and convex functions in Banach and locally convex spaces
Genèse des premiers espaces vectoriels de fonctions
Cet article examine comment la notion d’espace vectoriel de fonctions s’est peu à peu imposée dans l’analyse entre 1880 et 1930 environ. Malgré certaines approches formelles précoces, les questions linéaires en dimension infinie sont longtemps restées marquées par l’analogie avec la dimension finie, que l’on traitait alors à l’aide des déterminants. Nous regardons comment l’étude de l’équation de Fredholm d’une part, en particulier le travail de Hilbert, et l’émergence de notions topologiques d’autre...
Geometría de gramianos en el espacio de Hilbert.
The purpose of the Part I of this paper is to develop the geometry of Gram's determinants in Hilbert space. In Parts II and III a generalization is given of the Pythagorean theorem and triangular inequality for finite vector families.
Geometric aspects of the Tomita-Takesaki theory I.
Geometric aspects of the Tomita-Takesaki theory II.
Geometric characterization of L₁-spaces
The paper is devoted to a description of all real strongly facially symmetric spaces which are isometrically isomorphic to L₁-spaces. We prove that if Z is a real neutral strongly facially symmetric space such that every maximal geometric tripotent from the dual space of Z is unitary, then the space Z is isometrically isomorphic to the space L₁(Ω,Σ,μ), where (Ω,Σ,μ) is an appropriate measure space having the direct sum property.