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This paper is concerned with an inverse random source problem for the three-dimensional time-harmonic Maxwell equations. The source is assumed to be a centered complex-valued Gaussian vector field with correlated components, and its…

偏微分方程分析 · 数学 2020-02-21 Peijun Li , Xu Wang

We study the (weak) equilibrium problem arising from the problem of optimally stopping a one-dimensional diffusion subject to an expectation constraint on the time until stopping. The weak equilibrium problem is realized with a set of…

概率论 · 数学 2024-06-14 Sören Christensen , Maike Klein , Boy Schultz

The aim of this article is to investigate the uniqueness of solution of an inverse problem for ultrahyperbolic equations. We first reduce the inverse problem to a Cauchy problem for an integro-differential equation and then by using a…

偏微分方程分析 · 数学 2020-04-22 Fikret Gölgeleyen , Masahiro Yamamoto

We investigate uniqueness in the inverse problem of reconstructing simultaneously a spacewise conductivity function and a heat source in the parabolic heat equation from the usual conditions of the direct problem and additional information…

数值分析 · 数学 2012-10-30 Adriano De Cezaro , B. Tomas Johansson

We consider the time-harmonic Maxwell system in a domain with a generalized impedance edge-corner, namely the presence of two generalized impedance planes that intersect at an edge. The impedance parameter can be $0, \infty$ or a finite…

偏微分方程分析 · 数学 2020-05-15 Huaian Diao , Hongyu Liu , Long Zhang , Jun Zou

We study a local data inverse problem for the time-dependent Convection-Diffusion Equation (CDE) in a bounded domain where a part of the boundary is treated to be inaccessible. Up on assuming the inaccessible part to be flat, we seek for…

偏微分方程分析 · 数学 2025-01-09 Pranav Kumar , Anamika Purohit

Fractional Dzherbashian-Nersesian operator is considered and three famous fractional order derivatives namely Riemann-Liouville, Caputo and Hilfer derivatives are shown to be special cases of the earlier one. The expression for Laplace…

偏微分方程分析 · 数学 2021-11-09 Anwar Ahmad , Muhammad Ali , Salman A. Malik

The inversion theorem and convolution theorem of the conformable fractional Laplace transforms are developed. All the elementary properties of the classical Laplace transform are extended to the conformable fractional transform, and using…

动力系统 · 数学 2026-05-13 Somnath Sarate , Anil Khairnar , Krishnat Masalkar

We consider the inverse source problem in the parabolic equation, where the unknown source possesses the semi-discrete formulation. Theoretically, we prove that the flux data from any nonempty open subset of the boundary can uniquely…

数值分析 · 数学 2022-11-23 Guang Lin , Zecheng Zhang , Zhidong Zhang

When considering fractional diffusion equation as model equation in analyzing anomalous diffusion processes, some important parameters in the model, for example, the orders of the fractional derivative or the source term, are often unknown,…

偏微分方程分析 · 数学 2019-04-15 Zhiyuan Li , Masahiro Yamamoto

This paper is concerned with inverse scattering problems of determining the support of an isotropic and homogeneous penetrable body from knowledge of multi-static far-field patterns in acoustics and in linear elasticity. The normal…

偏微分方程分析 · 数学 2024-04-11 Chun Liu , Guanghui Hu , Jianli Xiang , Jiayi Zhang

We study the regularity and uniqueness of weak solutions of a degenerate parabolic equation, arising as the limit of a stochastic lattice model of self-propelled particles. The angle-average of the solution appears as a coefficient in the…

偏微分方程分析 · 数学 2025-09-09 Luca Alasio , Simon Schulz

We consider the homogenization for time-fractional diffusion equations in a periodic structure and we derive the homogenized time-fractional diffusion equation. Then we discuss the determination of the constant diffusion coefficient by…

偏微分方程分析 · 数学 2023-03-06 Atsushi Kawamoto , Manabu Machida , Masahiro Yamamoto

The present manuscript consists of inverse problems for a coupled system of wave equations with potential in $\mathbb{R}^3$. By establishing the fundamental solution to the aforementioned operator, we study the uniqueness aspects of the…

偏微分方程分析 · 数学 2026-04-09 Rahul Bhardwaj , Manmohan Vashisth

Bounded weak solutions to a particular class of degenerate parabolic cross-diffusion systems are shown to coincide with the unique strong solution determined by the same initial condition on the maximal existence interval of the latter. The…

偏微分方程分析 · 数学 2022-07-04 Philippe Laurençot , Bogdan-Vasile Matioc

The weak-strong uniqueness of solutions to a broad class of cross-diffusion systems with volume filling is established. In general, the diffusion matrices are neither symmetric nor positive definite. This issue is overcome by supposing that…

偏微分方程分析 · 数学 2025-10-01 Maria Heitzinger , Ansgar Jüngel

This article deals with an inverse problem of identifying the fractional order in the 1D time fractional diffusion equation (TFDE in short) using the measurement at one space-time point. Based on the expression of the solution to the…

偏微分方程分析 · 数学 2021-11-29 Yi Zhang , Xianzheng Jia , Gongsheng Li

Consider the interior transmission problem arising in inverse boundary value problems for the diffusion equation with discontinuous diffusion coefficients. We prove the unique solvability of the interior transmission problem by constructing…

偏微分方程分析 · 数学 2018-08-02 Gen Nakamura , Haibing Wang

We study an inverse problem for the fractional wave equation with a potential by the measurement taking on arbitrary subsets of the exterior in the space-time domain. We are interested in the issues of uniqueness and stability estimate in…

偏微分方程分析 · 数学 2023-04-06 Pu-Zhao Kow , Yi-Hsuan Lin , Jenn-Nan Wang

In this article, we consider the inverse problems of determining the damping coefficient appearing in the wave equation. We prove the unique determination of the coefficient from the data coming from a single coincident source-receiver…

偏微分方程分析 · 数学 2019-06-24 Manmohan Vashisth