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We extend the theory of distributional kernel operators to a framework of generalized functions, in which they are replaced by integral kernel operators. Moreover, in contrast to the distributional case, we show that these generalized…

General Mathematics · Mathematics 2016-08-16 Séverine Bernard , Jean-François Colombeau , Antoine Delcroix

In connection with the classical Schwartz kernel theorem, we show that in the framework of Colombeau generalized functions a large class of linear mappings admit integral kernels. To do this, we need to introduce news spaces of generalized…

Functional Analysis · Mathematics 2007-06-13 A. Delcroix

We introduce and systematically develop two classes of discrete integrable operators: those with $2\times 2$ matrix kernels and those possessing general differential kernels, thereby generalizing the discrete analogue previously studied. A…

Exactly Solvable and Integrable Systems · Physics 2025-11-10 Huan Liu

In this article, we introduce a class of multilinear fractional integral operators with generalized kernels that are weaker than the Dini kernel condition. We establish the boundedness of multilinear fractional integral operators with…

Functional Analysis · Mathematics 2024-06-14 Yan Lin , Yuhang Zhao , Shuhui Yang

The asymptotic properties of integral operators with the generalized sine kernel acting on the real axis are studied. The formulas for the resolvent and the Fredholm determinant are obtained in the large x limit. Some applications of the…

Mathematical Physics · Physics 2015-05-19 N. A. Slavnov

We compute bilinear integrals involving Macdonald and Gegenbauer functions. These integrals are convergent only for a limited range of parameters. However, when one uses generalized integrals they can be computed essentially without…

Classical Analysis and ODEs · Mathematics 2023-06-16 Jan Dereziński , Christian Gaß , Błażej Ruba

We introduce a suitable notion of integral operators (comprising the fractional Laplacian as a particular case) acting on functions with minimal requirements at infinity. For these functions, the classical definition would lead to divergent…

Analysis of PDEs · Mathematics 2022-02-09 Serena Dipierro , Aleksandr Dzhugan , Enrico Valdinoci

Many different types of fractional calculus have been proposed, which can be organised into some general classes of operators. For a unified mathematical theory, results should be proved in the most general possible setting. Two important…

Classical Analysis and ODEs · Mathematics 2021-01-12 Christian Maxime Steve Oumarou , Hafiz Muhammad Fahad , Jean-Daniel Djida , Arran Fernandez

By considering generalized logarithm and exponential functions used in nonextensive statistics, the four usual algebraic operators : addition, subtraction, product and division, are generalized. The properties of the generalized operators…

Mathematical Physics · Physics 2009-11-10 L. Nivanen , A. Le Mehaute , Q. A. Wang

A generalized quantum distribution function is introduced. The corresponding ordering rule for non-commuting operators is given in terms of a single parameter. The origin of this parameter is in the extended canonical transformations that…

Quantum Physics · Physics 2007-05-23 S. Nasiri , S. Khademi , S. Bahrami , F. Taati

Integral representations of two $q$-difference operators are provided in terms of special functions arising in the theory of asymptotic solutions to $q$-difference equations in the complex domain. Both representations are unified through…

Complex Variables · Mathematics 2026-03-27 Antonio Cáceres , Alberto Lastra , Sławomir Michalik , Maria Suwińska

Inversion of operators is a fundamental concept in data processing. Inversion of linear operators is well studied, supported by established theory. When an inverse either does not exist or is not unique, generalized inverses are used. Most…

Statistics Theory · Mathematics 2024-04-02 Eyal Gofer , Guy Gilboa

The primary goal of this paper is to introduce and investigate generalized incomplete exponential functions with matrix parameters. Integral representation, differential formula, addition formula, multiplication formula, and recurrence…

Classical Analysis and ODEs · Mathematics 2023-08-25 Ashish Verma , Komal Singh Yadav

In this note we study the application of generalized fractional operators to a particular class of nonstandard Lagrangians. These are typical of dissipative systems and the corresponding Euler-Lagrange and Hamilton equations are analyzed.…

Mathematical Physics · Physics 2015-05-19 Giorgio S. Taverna , Delfim F. M. Torres

We present an extension of a previously developed method employing the formalism of the fractional derivatives to solve new classes of integral equations. This method uses different forms of integral operators that generalizes the…

Mathematical Physics · Physics 2010-07-30 D. Babusci , G. Dattoli , D. Sacchetti

We give a mathematical formalization of `generalized data parallel' operations, a concept that covers such common scientific kernels as matrix-vector multiplication, multi-grid coarsening, load distribution, and many more. We show that from…

Distributed, Parallel, and Cluster Computing · Computer Science 2016-02-09 Victor Eijkhout

In this paper we provide a full characterization of linear integral operators acting from the space of functions of bounded Jordan variation to the space of functions of bounded Schramm variation in terms of their generating kernels.

Functional Analysis · Mathematics 2023-10-16 Jacek Gulgowski , Piotr Kasprzak , Piotr Maćkowiak

We show that the generalised composition of generalised integral operators is well defined on the space Colombeau algebras of tempered generalised functions.

Functional Analysis · Mathematics 2021-07-27 Alexei Filinkov , Ian Fuss

We define an integral, the distributional integral of functions of one real variable, that is more general than the Lebesgue and the Denjoy-Perron-Henstock-Kurzweil integrals, and which allows the integration of functions with…

Functional Analysis · Mathematics 2013-11-12 Ricardo Estrada , Jasson Vindas

Generalized Fourier integral operators (FIOs) acting on Colombeau algebras are defined. This is based on a theory of generalized oscillatory integrals (OIs) whose phase functions as well as amplitudes may be generalized functions of…

Analysis of PDEs · Mathematics 2008-03-04 Claudia Garetto
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