Isometries of normed spaces
We improve the Mazur-Ulam theorem by relaxing the surjectivity condition.
Isometries of Orlicz Spaces of Vector Valued Functions.
Isometries of some F-algebras of holomorphic functions on the upper half plane
Linear isometries of N p(D) onto N p(D) are described, where N p(D), p > 1, is the set of all holomorphic functions f on the upper half plane D = {z ∈ ℂ: Im z > 0} such that supy>0 ∫ℝ lnp (1 + |(x + iy)|) dx < +∞. Our result is an improvement of the results by D.A. Efimov.
Isometries of the unitary groups in C*-algebras
We give a complete description of the structure of surjective isometries between the unitary groups of unital C*-algebras. While any surjective isometry between the unitary groups of von Neumann algebras can be extended to a real-linear Jordan *-isomorphism between the relevant von Neumann algebras, this is not the case for general unital C*-algebras. We show that the unitary groups of two C*-algebras are isomorphic as metric groups if and only if the C*-algebras are isomorphic in the sense that...
Isometries on linear -normed spaces.
Isometries on products of composition and integral operators on Bloch type space.
Isométries positives et propriétés ergodiques de quelques espaces de Banach
Isomorphic and isometric copies of in duals of Banach spaces and Banach lattices
Let and be a Banach space and a real Banach lattice, respectively, and let denote an infinite set. We give concise proofs of the following results: (1) The dual space contains an isometric copy of iff contains an isometric copy of , and (2) contains a lattice-isometric copy of iff contains a lattice-isometric copy of .
Isomorphic characterizations of Hilbert spaces by orthogonal series with vector valued coefficients
Isomorphic characterizations of inner product spaces by orthogonal series with vector valued coefficients
Isomorphic classification and lifting theorems for spaces of differentiable functions with Lipschitz conditions
Isomorphic classification of the tensor products
It is proved, using so-called multirectangular invariants, that the condition αβ = α̃β̃ is sufficient for the isomorphism of the spaces and . This solves a problem posed in [14, 15, 1]. Notice that the necessity has been proved earlier in [14].
Isomorphic embeddings of some generalized power series spaces
Isomorphic groupoid -algebras associated with different Haar systems.
Isomorphic properties in spaces of compact operators
We introduce the definition of -limited completely continuous operators, . The question of whether a space of operators has the property that every -limited subset is relative compact when the dual of the domain and the codomain have this property is studied using -limited completely continuous evaluation operators.
Isomorphic Schauder decompositions in certain Banach spaces
We extend a theorem of Kato on similarity for sequences of projections in Hilbert spaces to the case of isomorphic Schauder decompositions in certain Banach spaces. To this end we use ℓψ-Hilbertian and ∞-Hilbertian Schauder decompositions instead of orthogonal Schauder decompositions, generalize the concept of an orthogonal Schauder decomposition to the case of Banach spaces and introduce the class of Banach spaces with Schauder-Orlicz decompositions. Furthermore, we generalize the notions of type,...
Isomorphic type of the space of smooth functions determined by a finite family of differential operators.
Isomorphically isometric probabilistic normed linear spaces.
Probabilistic normed linear spaces (briefly PNL spaces) were first studied by A. N. Serstnev in [1]. His definition was motivated by the definition of probabilistic metric spaces (PM spaces) which were introduced by K. Menger and subsequebtly developed by A. Wald, B. Schweizer, A. Sklar and others.In a previuos paper [2] we studied the relationship between two important classes of PM spaces, namely E-spaces and pseudo-metrically generated PM spaces. We showed that a PM space is pseudo-metrically...
Isomorphism Between the Associative and Non-Associative Lp-Spaces of Type II1 Hyperfinite Factors.
Isomorphism of certain weak spaces
It is shown that the weak spaces , and are isomorphic as Banach spaces.