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In this paper, we consider the inverse problem of determining the time-dependent source term in the general setting of Hilbert spaces and for general additional data. We prove the well-posedness of this inverse problem by reducing the…

偏微分方程分析 · 数学 2023-06-09 Daurenbek Serikbaev , Michael Ruzhansky , Niyaz Tokmagambetov

The paper considers an inverse source problem for a one-dimensional time-fractional heat equation with the generalized impedance boundary condition. The inverse problem is the time dependent source parameter identification together with the…

偏微分方程分析 · 数学 2016-09-06 M. Cicek , M. I. Ismailov

In this paper we explore the weak solutions of the Cauchy problem and an inverse source problem for the heat equation in the quantum calculus, formulated in abstract Hilbert spaces. For this we use the Fourier series expansions. Moreover,…

偏微分方程分析 · 数学 2022-12-16 Michael Ruzhansky , Serikbol Shaimardan

In the present paper we study inverse problems related to determining the time-dependent coefficient and unknown source function of fractional heat equations. Our approach shows that having just one set of data at an observation point…

偏微分方程分析 · 数学 2024-05-24 Azizbek Mamanazarov , Durvudkhan Suragan

An inverse source problem for the heat equation is considered. Extraction formulae for information about the time and location when and where the unknown source of the equation firstly appeared are given from a single lateral boundary…

偏微分方程分析 · 数学 2010-02-16 Masaru Ikehata

In this paper, we investigate direct and inverse problems for the time-fractional heat equation with a time-dependent leading coefficient for positive operators. First, we consider the direct problem, and the unique existence of the…

偏微分方程分析 · 数学 2023-06-14 Daurenbek Serikbaev , Michael Ruzhansky , Niyaz Tokmagambetov

We discuss inverse problems of determining the time-dependent source coefficient for a general class of subelliptic heat equations. We show that a single data at an observation point guarantees the existence of a (smooth) solution pair for…

偏微分方程分析 · 数学 2023-06-02 Mansur I. Ismailov , Tohru Ozawa , Durvudkhan Suragan

This paper considers the initial-boundary value problem for the heat equation with a dynamic type boundary condition. Under some regularity, consistency and orthogonality conditions, the existence, uniqueness and continuous dependence upon…

数学物理 · 物理学 2013-06-21 Nazim B. Kerimov , Mansur I. Ismailov

In this paper, we investigate the direct and linear inverse problems of identifying time-dependent and time-independent source terms in a time-fractional diffusion-wave equation, using measured data at an interior point of the time…

偏微分方程分析 · 数学 2025-08-11 Rahmonov Askar Ahmadovich

In this paper, we consider two linear inverse problems for the time-fractional wave equation, assuming that its right-hand side takes the separable form $f(t)h(x)$, where $t \geq 0$ and $x \in \Omega \subset R^N $. The objective is to…

偏微分方程分析 · 数学 2025-03-25 Durdiev Durdimurod Kalandarovich

In this paper we consider the problem of simultaneously determining the time-dependent thermal diffusivity and the temperature distribution in one-dimensional heat equation in the case of nonlocal boundary and integral overdetermination…

偏微分方程分析 · 数学 2015-03-17 Mansur I. Ismailov , Fatma Kanca

We study an inverse parabolic problem of identifying two source terms in heat equation with dynamic boundary conditions from a final time overdetermination data. Using a weak solution approach by Hasanov, the associated cost functional is…

偏微分方程分析 · 数学 2022-03-22 E. M. Ait Ben Hassi , S. E. Chorfi , L. Maniar

This paper delves into the Inverse Stefan problem, specifically focusing on determining the time-dependent source coefficient in the parabolic heat equation governing heat transfer in a semi-infinite rod. The problem entails the intricate…

偏微分方程分析 · 数学 2025-01-22 Targyn A. Nauryz , Khumoyun Jabbarkhanov

This paper is devoted to the study of the inverse problem of determining the right-hand side of the subdiffusion equation with the Caputo derivative with respect to time. In our case, the inverse problem consists in restoring the…

偏微分方程分析 · 数学 2025-05-20 R. R. Ashurov , O. T. Mukhiddinova

In the present paper we consider an inverse source problem for time-fractional mixed parabolic-hyperbolic equation with the Caputo derivative. In case, when hyperbolic part of the considered mixed type equation is wave equation, the…

偏微分方程分析 · 数学 2015-12-08 Pengbin Feng , E. T. Karimov

Under consideration are mathematical models of heat and mass transfer. We study inverse problems of recovering lower-order coefficients in a second order parabolic equation. The coefficients are representable in the form of a finite…

偏微分方程分析 · 数学 2024-12-23 S. G. Pyatkov , O. A. Soldatov

In this paper, we obtain the sharp uniqueness for an inverse $x$-source problem for a one-dimensional time-fractional diffusion equation with a zeroth-order term by the minimum possible lateral Cauchy data. The key ingredient is the unique…

偏微分方程分析 · 数学 2023-01-02 Zhiyuan Li , Yikan Liu , Masahiro Yamamoto

Two main aims of this paper are to develop a numerical method to solve an inverse source problem for parabolic equations and apply it to solve a nonlinear coefficient inverse problem. The inverse source problem in this paper is the problem…

偏微分方程分析 · 数学 2019-06-06 Phuong Mai Nguyen , Loc Hoang Nguyen

This article is devoted to inverse problems of recovering point sources in mathematical models of heat and mass transfer. The main attention is paid to well-posedness questions of these inverse problems with pointwise overdetermination…

偏微分方程分析 · 数学 2023-09-01 Sergey Pyatkov , Lyubov Neustroeva

In this paper, we deal with the inverse source problem of determining a source in a time fractional diffusion equation where data are given at a fixed time. This problem is ill-posed, i.e., the solution does not depend continuously on the…

概率论 · 数学 2016-11-29 Tuan Nguyen Huy , Erkan Nane
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