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In this paper, we consider an integro-differential equation in L^2(R), which involves the logarithmic Laplacian in the presence of a drift term. The linear operator associated with the problem has the Fredholm property. By using a fixed…

Analysis of PDEs · Mathematics 2024-04-16 Yuming Chen , Vitali Vougalter

In this article, we consider a system of integro-differential equations in L^2(R, R^N), which contains the logarithmic Laplacian in the presence of transport terms. The linear operators associated with the system satisfy the Fredholm…

Analysis of PDEs · Mathematics 2024-06-13 Yuming Chen , Vitali Vougalter

We demonstrate the existence in the sense of sequences of solutions for some integro-differential type problems involving the drift term and the square of the Laplace operator, on the whole real line or on a finite interval with periodic…

Analysis of PDEs · Mathematics 2025-09-16 Vitali Vougalter

The article is devoted to the solvability of a system of integro-differential equations in the case of the difference of the standard Laplacian and the bi-Laplacian in the diffusion terms. The proof of the existence of solutions is based on…

Analysis of PDEs · Mathematics 2026-04-28 Vitali Vougalter , Vitaly Volpert

The work deals with the studies of the existence of solutions of an integro-differential equation in the situation of the difference of the standard Laplacian and the bi-Laplacian in the diffusion term. The proof of the existence of…

Analysis of PDEs · Mathematics 2026-03-10 Vitali Vougalter , Vitaly Volpert

We prove the existence of solutions for some integro-differential systems containing equations with and without the drift terms in the H^2 spaces by virtue of the fixed point technique when the elliptic equations contain second order…

Analysis of PDEs · Mathematics 2024-01-24 Messoud Efendiev , Vitali Vougalter

In the first part of the article we establish the existence in the sense of sequences of solutions in $H^{2}(R)$ for some nonhomogeneous linear differential equation in which one of the terms has the argument translated by a constant. It is…

Analysis of PDEs · Mathematics 2026-01-01 Vitali Vougalter , Vitaly Volpert

We show global and interior higher-order log-H\"older regularity estimates for solutions of Dirichlet integral equations where the operator has a nonintegrable kernel with a singularity at the origin that is weaker than that of any…

Analysis of PDEs · Mathematics 2022-10-05 Héctor A. Chang-Lara , Alberto Saldaña

The paper is devoted to the investigation of the solvability of an integro-differential equation in the case of the double scale anomalous diffusion with a sum of two negative Laplacians in different fractional powers in R^3. The proof of…

Analysis of PDEs · Mathematics 2024-12-02 Vitali Vougalter , Vitaly Volpert

We prove, using a fixed point theorem in a Banach algebra, an existence result for a fractional functional differential equation in the Riemann-Liouville sense. Dependence of solutions with respect to initial data and an uniqueness result…

Classical Analysis and ODEs · Mathematics 2012-06-21 Moulay Rchid Sidi Ammi , El Hassan El Kinani , Delfim F. M. Torres

We prove the existence of stationary solutions for some systems of reaction-diffusion type equations with superdiffusion in the corresponding H^2 spaces. Our method is based on the fixed point theorem when the elliptic problems contain…

Analysis of PDEs · Mathematics 2024-09-17 Vitali Vougalter

This paper addresses the problem of finding an asymptotic solution for first and second order integro-differential equations containing an arbitrary kernel, by evaluating the corresponding inverse Laplace and Fourier transforms. The aim of…

Statistical Mechanics · Physics 2010-08-03 Mauro Bologna

This paper is devoted to a nonlinear singular Riemann-Liouville type fractional differential equation, the local existence of whose continuous solutions under the weakest condition remained as an open problem until now. The singularity of…

General Mathematics · Mathematics 2021-11-30 Müfit Şan

Linear differential equations with variable coefficients and Prabhakar-type operators featuring Mittag-Leffler kernels are solved. In each case, the unique solution is constructed explicitly as a convergent infinite series involving…

Classical Analysis and ODEs · Mathematics 2022-05-27 Arran Fernandez , Joel E. Restrepo , Durvudkhan Suragan

This paper deals with nonlinear Fredholm integral equations of the second kind. We study the case of a weakly singular kernel and we set the problem in the space L 1 ([a, b], C). As numerical method, we extend the product integration scheme…

Numerical Analysis · Mathematics 2016-02-08 L. Grammont , H. Kaboul , M. Ahues

We survey methods and results of fractional differential equations in which an unknown function is under the operation of integration and/or differentiation of fractional order. As an illustrative example, we review results on fractional…

Analysis of PDEs · Mathematics 2018-11-12 Moulay Rchid Sidi Ammi , Delfim F. M. Torres

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

The work deals with establishing the solvability of a system of integro-differential equations in the situation of the double scale anomalous diffusion. Each equation of such system involves the sum of the two negative Laplace operators…

Analysis of PDEs · Mathematics 2025-05-23 Vitali Vougalter , Vitaly Volpert

This paper considers the existence and multiplicity of fixed points for the integral operator \begin{equation*} {\mathcal{T}}u(t)=\lambda \,\int_{0}^{T}k(t,s)\,f(s,u(s),u^{\prime }(s),\dots ,u^{(m)}(s))\,\dif s,\quad t\in \lbrack 0,T]\equiv…

Classical Analysis and ODEs · Mathematics 2018-11-16 Lucía López-Somoza , Feliz Minhós

This work is devoted to the study of the existence of at least one weak solution to nonlocal equations involving a general integro-differential operator of fractional type. As a special case, we derive an existence theorem for the…

Analysis of PDEs · Mathematics 2020-04-22 Giovanni Molica Bisci , Dušan D. Repovš
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