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We study the classification of spaces of continuous functions $C(K)$ under positive linear maps. For infinite countable compacta, we show that whenever $C(K)$ and $C(L)$ are isomorphic, there exists an isomorphism $T:C(K)\to C(L)$…

Functional Analysis · Mathematics 2026-01-19 Marek Cúth , Jonáš Havelka , Jakub Rondoš , Bünyamin Sarı

We present some extensions of classical results that involve elements of the dual of Banach spaces, such as Bishop-Phelp's theorem and James' compactness theorem, but restricting to sets of functionals determined by geometrical properties.…

Functional Analysis · Mathematics 2015-08-04 Bernardo Cascales , José Orihuela , Antonio Pérez

The paper is concerned with the problem whether a nonseparable Banach space must contain an uncountable set of vectors such that the distances between every two distinct vectors of the set are the same. Such sets are called equilateral. We…

Functional Analysis · Mathematics 2015-04-21 Piotr Koszmider

This paper studies constrained information projections on Banach spaces with respect to a Gaussian reference measure. Specifically our interest lies in characterizing projections of the reference measure, with respect to the KL-divergence,…

Probability · Mathematics 2021-04-20 Zachary Selk , William Haskell , Harsha Honnappa

I introduce Banach spaces on which it is possible to precisely characterize the spectrum of the transfer operator associated to a piecewise expanding map with H\"older weight.

Dynamical Systems · Mathematics 2012-10-17 Carlangelo Liverani

We give a self-contained and simplified presentation of the theory of covariant representations for inverse semigroup actions on Banach algebras, which was recently introduced in the authors and A. Mckee in the twisted case. The main result…

Functional Analysis · Mathematics 2026-01-22 K. Bardadyn , B. K. Kwaśniewski

A Banach space has the Schur property when every weakly convergent sequence converges in norm. We prove a Schur-like property for measures: if a sequence of finite signed Borel measures on a Polish space is such that it is bounded in total…

Functional Analysis · Mathematics 2018-12-18 Sander C. Hille , Tomasz Szarek , Daniel T. H. Worm , Maria Ziemlanska

We present a natural way to cover an Archimedean directed ordered vector space $E$ by Banach spaces and extend the notion of Bochner integrability to functions with values in $E$. The resulting set of integrable functions is an Archimedean…

Functional Analysis · Mathematics 2021-10-18 Arnoud van Rooij , Willem van Zuijlen

For a nonadditive measure $\mu$, the space $\mathcal{L}^0(\mu)$ of all measurable functions, the Choquet-Lorentz space $\mathcal{L}^{p,q}(\mu)$, the Lorentz space of weak type $\mathcal{L}^{p,\infty}(\mu)$, the space…

Classical Analysis and ODEs · Mathematics 2022-10-07 Jun Kawabe , Naoki Yamada

Let $X$ and $Y$ be separable Banach spaces. Suppose $Y$ either has a shrinking basis or $Y$ is isomorphic to $C(2^\mathbb{N})$ and $A$ is a subset of weakly compact operators from $X$ to $Y$ which is analytic in the strong operator…

Functional Analysis · Mathematics 2013-04-15 Kevin Beanland , Daniel Freeman

Let X be a separable metric space and let \beta be the strict topology on the space of bounded continuous functions on X, which has the space of \tau-additive Borel measures as a continuous dual space. We prove a Banach-Dieudonne\'{e} type…

Functional Analysis · Mathematics 2016-09-06 Richard Kraaij

A positive non-commutative (NC) measure is a positive linear functional on the free disk operator system which is generated by a $d$-tuple of non-commuting isometries. By introducing the hybrid forms, their Cauchy transforms, and techniques…

Operator Algebras · Mathematics 2024-02-16 Fouad Naderi

We present sampling theorems for reproducing kernel Banach spaces on Lie groups. Recent approaches to this problem rely on integrability of the kernel and its local oscillations. In this paper we replace the integrability conditions by…

Functional Analysis · Mathematics 2010-08-04 Jens Gerlach Christensen

We consider a transfer operator where two interacting cells carrying non-negative traits transfer a random fraction of their trait to each other. These transfers can lead to population having singular distributions in trait. We extend the…

Analysis of PDEs · Mathematics 2025-06-17 Pierre Magal , Gaël Raoul

A new approach to the problem of measurement in quantum mechanics is proposed. In this approach, the process of measurement is described in the Heisenberg picture and divided into two stages. The first stage is to transduce the measured…

Quantum Physics · Physics 2007-05-23 Masanao Ozawa

We investigate possible quantifications of R. C. James' classical work on bases and reflexivity of Banach spaces. By introducing new quantities measuring how far a basic sequence is from being shrinking and/or boundedly complete, we prove…

Functional Analysis · Mathematics 2021-04-15 Dongyang Chen , Tomasz Kania , Yingbin Ruan

Disentangled representation learning plays a pivotal role in making representations controllable, interpretable and transferable. Despite its significance in the domain, the quest for reliable and consistent quantitative disentanglement…

Machine Learning · Computer Science 2024-10-07 Sahib Julka , Yashu Wang , Michael Granitzer

This tutorial gives an overview of some of the basic techniques of measure theory. It includes a study of Borel sets and their generators for Polish and for analytic spaces, the weak topology on the space of all finite positive measures…

Functional Analysis · Mathematics 2014-11-13 Ernst-Erich Doberkat

We show that for a very wide class of Banach spaces of functions on [0,1] there are intrinsic lower bounds for the essential spectral radius of the transfer operator associated to piecewise smooth expanding maps. The class of Banach spaces…

Dynamical Systems · Mathematics 2025-06-10 Oliver Butterley , Daniel Smania

We study the dynamical properties of composition operators acting on Banach spaces of measurable functions. In particular, we study in some detail the composition operators induced by odometers, which allows us to give a variety of new…

Functional Analysis · Mathematics 2026-05-25 Frédéric Bayart , Etienne Matheron