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We consider the problem of complex interpolation of certain Hardy-type subspaces of K\"othe function spaces. For example, suppose $X_0$ and $X_1$ are K\"othe function spaces on the unit circle $\bold T,$ and let $H_{X_0}$ and $H_{X_1}$ be…

Functional Analysis · Mathematics 2016-09-06 Nigel J. Kalton

Let X be an L1-predual and E,F be Banach spaces. We use the fact that an unconditionally converging operator T from the injective tensor product of X and E to F is strongly bounded and extend T to an operator S on continuous F-valued…

Functional Analysis · Mathematics 2026-04-21 Štěpán Ondřej , Jiří Spurný

In this manuscript, we present a common tensor framework which can be used to generalize one-dimensional numerical tasks to arbitrary dimension $d$ by means of tensor product formulas. This is useful, for example, in the context of…

Numerical Analysis · Mathematics 2022-05-17 Marco Caliari , Fabio Cassini , Franco Zivcovich

Given any Banach space $X$ and any weak*-compact subset $K$ of $X^*$, we compute the Szlenk index of the weak*-closed, convex hull of $K$ as a function of the Szlenk index of $K$. Also as an application, we compute the Szlenk index of any…

Functional Analysis · Mathematics 2017-06-06 Ryan M Causey

The purpose of this paper is to introduce the class of enriched interpolative Kannan type operators on Banach space that contains the classes of enriched Kannan operators, interpolative Kannan type contraction operators and some other…

Functional Analysis · Mathematics 2022-09-28 Mujahid Abbas , Rizwan Anjum , Shakeela Riasat

In this paper, we obtain a restricted decomposition formula for interpolated multiple zeta values using t-stuffle product. We then derive a recursive formula of t-stuffle product, which also provides a route to the same formula. In both…

Number Theory · Mathematics 2024-11-12 Pitu Sarkar , Nita Tamang

Some reverses of the continuous triangle inequality for Bochner integral of vector-valued functions in complex Hilbert spaces are given. Applications for complex-valued functions are provided as well.

Functional Analysis · Mathematics 2007-05-23 Sever Silvestru Dragomir

We give a characterization of the operators on the injective tensor product $E \hat{\otimes}_\varepsilon X$ for any separable Banach space $E$ and any (non-separable) Banach space $X$ with few operators, in the sense that any operator $T: X…

Functional Analysis · Mathematics 2025-09-23 Antonio Acuaviva

A nonstandard application of bivariate polynomial interpolation is discussed: the implicitization of a rational algebraic curve given by its parametric equations. Three different approaches using the same interpolation space are considered,…

Numerical Analysis · Mathematics 2007-05-23 Ana Marco , Jose-Javier Martinez

We consider a tensor product of two spaces of holomorphic functions on a Hermitian symmetric space of tube type. Then generically this is decomposed into a direct sum of irreducible subrepresentations. In this manuscript, we construct the…

Representation Theory · Mathematics 2026-03-24 Ryosuke Nakahama

We derive integral formulas that simplify the Vector Spherical Tensor Product recently introduced by Xie et al., which generalizes the Gaunt tensor product to antisymmetric couplings. In particular, we obtain explicit closed-form…

Machine Learning · Computer Science 2026-03-10 Valentin Heyraud , Zachary Weller-Davies , Jules Tilly

We prove that an arbitrary Banach couple is uniquely determined by the collection of intermediate spaces that are interpolation spaces for the operators of rank one. From this we deduce a confirmation to the conjecture by Yu. A. Brudnyi and…

Functional Analysis · Mathematics 2007-05-23 Lidia V. Veselova , Oleg E. Tikhonov

We show that complemented subspaces of uncountable products of Banach spaces are products of complemented subspaces of countable subproducts.

Functional Analysis · Mathematics 2007-05-23 Alex Chigogidze

We investigate a method for producing concrete convex-transitive Banach spaces. The gist of the method is in getting rid of dissymmetries of a given space by taking a carefully chosen quotient. The spaces of interest here are typically…

Functional Analysis · Mathematics 2011-06-08 Jarno Talponen

In this paper we first take a detail survey of the study of the Banach-Saks property of Banach spaces and then show the Banach-Saks property of the product spaces generated by a finite number of Banach spaces having the Banach-Saks…

Functional Analysis · Mathematics 2007-05-23 Zhenglu Jiang , Xiaoyong Fu

We define the $k$:th moment of a Banach space valued random variable as the expectation of its $k$:th tensor power; thus the moment (if it exists) is an element of a tensor power of the original Banach space. We study both the projective…

Probability · Mathematics 2012-08-31 Svante Janson , Sten Kaijser

In this paper, we introduce and analyze multidimensional vector-valued Laplace transform of functions with values in sequentially complete locally convex spaces. A great number of our results seem to be new even for the functions with…

Functional Analysis · Mathematics 2025-06-25 Marko Kostic

In this paper, we study integral functionals defined on spaces of functions with values on general (non-separable) Banach spaces. We introduce a new class of integrands and multifunctions for which we obtain measurable selection results.…

Optimization and Control · Mathematics 2022-08-10 Juan Guillermo Garrido , Pedro Pérez-Aros , Emilio Vilches

We study injective and projective tensor products of measurable Banach bundles. More precisely, given two separable measurable Banach bundles ${\bf E}$, ${\bf F}$ defined over a probability space $({\rm X},\Sigma,\mathfrak m)$, we construct…

Functional Analysis · Mathematics 2025-08-28 Milica Caković , Danka Lučić , Enrico Pasqualetto

A vector-valued version of the Girsanov theorem is presented, for a scalar process with respect to a Banach-valued measure. Previously, a short discussion about the Birkhoff-type integration is outlined, as for example integration by…

Functional Analysis · Mathematics 2019-12-04 Domenico Candeloro , Anna Rita Sambucini