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We prove two theorems of Paley and Wiener in the slice regular setting. As an application, we can compute the reproducing kernel for the slice regular Paley-Wiener space, and obtain a related sampling theorem.

Complex Variables · Mathematics 2025-04-17 Yanshuai Hao , Pei Dang , Weixiong Mai

In the Clifford algebra setting the present study develops three reproducing kernel Hilbert spaces of the Paley-Wiener type, namely the Paley-Wiener spaces, the Hardy spaces on strips, and the Bergman spaces on strips. In particular, we…

Complex Variables · Mathematics 2021-08-31 Pei Dang , Weixiong Mai , Tao Qian

Paley-Wiener type theorems describe the image of a given space of functions, often compactly supported functions, under an integral transform, usually a Fourier transform on a group or homogeneous space. Several authors have studied…

Representation Theory · Mathematics 2015-12-01 Vivian M. Ho , Gestur Olafsson

In this paper we discuss some basic properties of octonionic Bergman and Hardy spaces. In the first part we review some fundamental concepts of the general theory of octonionic Hardy and Bergman spaces together with related reproducing…

Complex Variables · Mathematics 2023-11-15 Fabrizio Colombo , Rolf Soeren Krausshar , Irene Sabadini

In this paper, we introduce the quaternionic slice polyanalytic functions and we prove some of their properties. Then, we apply the obtained results to begin the study of the quaternionic Fock and Bergman spaces in this new setting. In…

Complex Variables · Mathematics 2021-03-16 Daniel Alpay , Kamal Diki , Irene Sabadini

We examine how the square-integrable function subspaces are transformed using the holomorphic Fourier transform. On account of this, the extended Paley-Wiener theorem over the Hardy-Sobolev spaces is produced. The theorem also asserts that…

Functional Analysis · Mathematics 2024-03-19 Detian Liu , Haichou Li , Kit Ian Kou

The aim of this article is to give an overview of several types of Paley-Wiener theorems occuring in harmonic analysis related to symmetric spaces. This will serve as a motivation for the introduction of the $\Theta$-spherical functions,…

Representation Theory · Mathematics 2007-05-23 G. Olafsson , A. Pasquale

We consider a class of domains, generalizing the upper half-plane, and admitting rotational, translational and scaling symmetries, analogous to the half-plane. We prove Paley-Wiener type representations of functions in Bergman spaces of…

Complex Variables · Mathematics 2018-07-03 Debraj Chakrabarti , Pranav Upadrashta

Let X = G/H be a reductive symmetric space and K a maximal compact subgroup of G. The image under the Fourier transform of the space of K-finite compactly supported smooth functions on X is characterized.

Representation Theory · Mathematics 2007-05-23 E. P. van den Ban , H. Schlichtkrull

We prove a Paley-Wiener Theorem for a class of symmetric spaces of the compact type, in which all root multiplicities are even. This theorem characterizes functions of small support in terms of holomorphic extendability and exponential type…

Analysis of PDEs · Mathematics 2007-05-23 Thomas Branson , Gestur Olafsson , Angela Pasquale

A notion of Paley-Wiener spaces is introduced on combinatorial graphs. It is shown that functions from some of these spaces are uniquely determined by their values on some sets of vertices which are called the uniqueness sets. Such…

Spectral Theory · Mathematics 2011-11-28 Isaac Pesenson

Here we give a new approach to the Paley--Wiener theorem in a Mellin analysis setting which avoids the use of the Riemann surface of the logarithm and analytical branches and is based on new concepts of "polar-analytic function" in the…

Functional Analysis · Mathematics 2017-06-02 Carlo Bardaro , Paul L. Butzer , Ilaria Mantellini , G. Schmeisser

We develop real Paley-Wiener theorems for classes ${\mathcal S}_\omega$ of ultradifferentiable functions and related $L^{p}$-spaces in the spirit of Bang and Andersen for the Schwartz class. We introduce results of this type for the…

Functional Analysis · Mathematics 2023-04-18 Chiara Boiti , David Jornet , Alessandro Oliaro

The $\Theta$-spherical functions generalize the spherical functions on Riemannian symmetric spaces and the spherical functions on non-compactly causal symmetric spaces. In this article we consider the case of even multiplicity functions. We…

Functional Analysis · Mathematics 2007-05-23 Gestur Olafsson , Angela Pasquale

The two function theories of monogenic and of slice monogenic functions have been extensively studied in the literature and were developed independently; the relations between them, e.g. via Fueter mapping and Radon transform, have been…

Complex Variables · Mathematics 2024-12-19 Zhenghua Xu , Irene Sabadini

We study the Fourier transform for compactly supported distributional sections of complex homogeneous vector bundles on symmetric spaces of non-compact type $X = G/K$. We prove a characterisation of their range. In fact, from Delorme's…

Representation Theory · Mathematics 2022-02-15 Martin Olbrich , Guendalina Palmirotta

We deduce Paley-Wiener results in the Bargmann setting, which give characterisations of Pilipovi{\'c} spaces of low orders, extending the characterisation of a Gr{\"o}chenig test function space, deduced earlier by the third author.

Functional Analysis · Mathematics 2019-01-29 E. Nabizadeh , C. Pfeuffer , J. Toft

Let $M$ be a Riemmanian manifold with bounded geometry. We consider a generalization of Paley-Wiener functions and Lagrangian splines on $M$. An analog of the Paley-Wiener theorem is given. We also show that every Paley-Wiener function on a…

Functional Analysis · Mathematics 2011-08-30 Isaac Pesenson

We consider a reproducing kernel Hilbert space of discrete entire functions on the square lattice $\mathbb Z^2$ inspired by the classical Paley-Wiener space of entire functions of exponential growth in the complex plane. For such space we…

Complex Variables · Mathematics 2025-07-15 Alessandro Monguzzi , Matteo Monti

Contragenic functions are defined to be reduced-quaternion-valued harmonic functions which are orthogonal to all monogenic and antimonogenic functions in the $L^2$ norm of a given domain. The parallelism between the spaces of contragenic…

Complex Variables · Mathematics 2024-10-07 R. García-Ancona , J. Morais , R. Michael Porter
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