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In this paper, we study an inverse coefficients problem for two coupled Schr\"{o}dinger equations with an observation of one component of the solution. The observation is done in a nonempty open subset of the domain where the equations…

偏微分方程分析 · 数学 2019-07-24 Fangfang Dou , Masahiro Yamamoto

We consider solutions satisfying the zero Neumann boundary condition and a linearized mean field game equation in $\Omega \times (0,T)$ whose principal coefficients depend on the time and spatial variables with general Hamiltonian, where…

偏微分方程分析 · 数学 2023-04-14 Oleg Imanuvilov , Hongyu Liu , Masahiro Yamamoto

The approach to Lipschitz stability for uniformly parabolic equations introduced by Imanuvilov and Yamamoto in 1998, based on Carleman estimates, seems hard to apply to the case of Grushin-type operators of interest to this paper. Indeed,…

偏微分方程分析 · 数学 2015-06-17 Karine Beauchard , Piermarco Cannarsa , Masahiro Yamamoto

This work establishes a Lipschitz stability result for identifying unknown polygonal inclusions along with their unknown constant conductivity values, given boundary measurements encoded in the Dirichlet-to-Neumann map.

偏微分方程分析 · 数学 2026-05-12 Tianrui Dai

The paper is concerned with an inverse point source problem for the Helmholtz equation. It consists of recovering the locations and amplitudes of a finite number of radiative point sources inside a given inhomogeneous medium from the…

偏微分方程分析 · 数学 2021-09-01 Gang Bao , Yuantong Liu , Faouzi Triki

This paper is devoted to the investigation of the backward problem for a multi-term time-fractional diffusion equation. Backward problems for fractional diffusion equations are typically studied using regularization methods due to their…

偏微分方程分析 · 数学 2026-04-13 Ravshan Ashurov , Damir Shamuratov

This paper is mainly concerned with the observability inequalities for heat equations with time-dependent Lipschtiz potentials. The observability inequality for heat equations asserts that the total energy of a solution is bounded above by…

最优化与控制 · 数学 2025-07-29 Jiuyi Zhu , Jinping Zhuge

In this paper we study the inverse boundary value problem of determining the potential in the Schr\"{o}dinger equation from the knowledge of the Dirichlet-to-Neumann map, which is commonly accepted as an ill-posed problem in the sense that,…

偏微分方程分析 · 数学 2012-11-29 Elena Beretta , Maarten V. de Hoop , Lingyun Qiu

The main purpose of this work is to study an inverse coefficient problem for the telegrapher's equations on a tree-shaped network. To analyze the stability for this inverse problem, Carleman estimate is established first. Based upon this…

偏微分方程分析 · 数学 2023-06-13 Yibin Ding , Xiang Xu

Our aim is to study the backward problem, i.e. recover the initial data from the terminal observation, of the subdiffusion with time dependent coefficients. First of all, by using the smoothing property of solution operators and a…

数值分析 · 数学 2023-02-01 Zhengqi Zhang , Zhi Zhou

Let $(X,d)$ be a pathwise connected metric space equipped with an Ahlfors $Q$-regular measure $\mu$, $Q\in[1,\infty)$. Suppose that $(X,d,\mu)$ supports a 2-Poincar\'e inequality and a Sobolev-Poincar\'e type inequality for the…

偏微分方程分析 · 数学 2011-09-16 Renjin Jiang

We establish both Lipschitz and logarithmic stability estimates for an inverse flux problem and subsequently apply these results to an inverse boundary coefficient problem. Furthermore, we demonstrate how the stability inequalities derived…

偏微分方程分析 · 数学 2025-11-14 Mourad Choulli , Shuai Lu , Hiroshi Takase

In the preceding work \cite{watanabe3}, it is shown that the solution to the BCS gap equation for superconductivity is continuous with respect to both the temperature and the energy under the restriction that the temperature is very small.…

数学物理 · 物理学 2017-03-06 Shuji Watanabe , Ken Kuriyama

This paper is concerned with the stability estimates for inverse source problems of the stochastic Helmholtz equation driven by white noise. The well-posedness is established for the direct source problems, which ensures the existence and…

偏微分方程分析 · 数学 2023-07-14 Peijun Li , Ying Liang

We are interested in the identification of a Generalized Impedance Boundary Condition from the far--fields created by one or several incident plane waves at a fixed frequency. We focus on the particular case where this boundary condition is…

数值分析 · 数学 2013-07-23 Laurent Bourgeois , Nicolas Chaulet , Houssem Haddar

We study the inverse problem of determining a real-valued potential in the two-dimensional Schr\"odinger equation at negative energy from the Dirichlet-to-Neumann map. It is known that the problem is ill-posed and a stability estimate of…

偏微分方程分析 · 数学 2014-02-07 Matteo Santacesaria

In this paper, we consider the inverse problem of detecting a corrosion coefficient between two layers of a conducting medium from the Neumann-to-Dirichlet map. This inverse problem is motivated by the description of the index of corrosion…

数值分析 · 数学 2019-04-08 Bastian Harrach , Houcine Meftahi

This work considers a nonlinear inverse source problem in a coupled diffusion equation from the terminal observation. Theoretically, under some conditions on problem data, we build the uniqueness theorem for this inverse problem and show…

数值分析 · 数学 2025-04-29 Chunlong Sun , Wenlong Zhang , Zhidong Zhang

In this work we study the inverse boundary value problem of determining the refractive index in the acoustic equation. It is known that this inverse problem is ill-posed. Nonetheless, we show that the ill-posedness decreases when we…

偏微分方程分析 · 数学 2011-10-25 Sei Nagayasu , Gunther Uhlmann , Jenn-Nan Wang

Here we are investigating the one dimensional inverse source problem for Helmholtz equation where the source function is compactly supported in our domain. We show that increasing stability possible using multi-frequency wave at the two end…

偏微分方程分析 · 数学 2019-09-09 Shahah Almutairi , Ajith Gunaratne