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In numerical existence proofs for solutions of the semi-linear elliptic system, evaluating the norm of the inverse of a perturbed Laplace operator plays an important role. We reveal an eigenvalue problem to design a method for verifying the…

数值分析 · 数学 2021-12-15 Kouta Sekine , Kazuaki Tanaka , Shin'ichi Oishi

This article offers a study of the Calder\'on type inverse problem of determining up to second order coefficients of the higher order elliptic operator. Here we show that it is possible to determine an anisotropic second order perturbation…

偏微分方程分析 · 数学 2021-09-21 Sombuddha Bhattacharyya , Tuhin Ghosh

We construct a sequence of boundary value problems on compact subsets of smooth noncompact hyperbolic surfaces of finite area. We prove that the sesquilinear forms associated to these boundary value problems are stable as well as consistent…

偏微分方程分析 · 数学 2023-11-21 Richard Ninness

This paper is related to an inverse problem for a class of Dirac operators with discontinuous coefficient and eigenvalue parameter contained in boundary conditions. The asymptotic formula of eigenvalues of this problem is examined. The…

谱理论 · 数学 2015-10-13 Khanlar R. Mamedov , Ozge Akcay

We present first results on the Dirichlet-to-Neumann operator associated with the $1$-Laplace operator in $L^1$. In particular, we show that this operator can be realized as a sub-differential operator in $L^1\times L^{\infty}$ of a…

偏微分方程分析 · 数学 2021-04-20 Daniel Hauer , José M. Mazón

The magnetic Dirichlet-to-Neumann map encodes the voltage-to-current measurements under the influence of a magnetic field. In the case of surfaces, we provide precise spectral asymptotics expansion (up to arbitrary polynomial power) for the…

偏微分方程分析 · 数学 2025-08-15 Mihajlo Cekić , Anna Siffert

This paper presents a Meyer-Vietoris type gluing formula for a conformal invariant of a Riemannian surface with boundary that is defined by the determinant of the Dirichlet-to-Neumann operator. The formula is used to bound the asymptotics…

微分几何 · 数学 2022-09-27 Richard A. Wentworth

In this paper we study the Dirichlet problem for fully nonlinear second-order equations on a riemannian manifold. As in a previous paper we define equations via closed subsets of the 2-jet bundle. Basic existence and uniqueness theorems are…

偏微分方程分析 · 数学 2017-12-12 F. Reese Harvey , H. Blaine Lawson

This paper considers the inverse boundary value problem for the equation $\nabla\cdot(\sigma\nabla u+a|\nabla u|^{p-2}\nabla u)=0$. We give a procedure for the recovery of the coefficients $\sigma$ and $a$ from the corresponding…

偏微分方程分析 · 数学 2021-02-03 Cătălin I. Cârstea , Manas Kar

We study the variational structure of the complex $k$-Hessian equation on bounded domain $X\subset \mathbb C^n$ with boundary $M=\partial X$. We prove that the Dirichlet problem $\sigma_k (\partial \bar{\partial} u) =0$ in $X$, and $u=f$ on…

偏微分方程分析 · 数学 2020-08-28 Yi Wang , Hang Xu

We consider a strongly damped wave equation on compact manifolds, both with and without boundaries, and formulate the corresponding inverse problems. For closed manifolds, we prove that the metric can be uniquely determined, up to an…

偏微分方程分析 · 数学 2023-09-29 Li Li , Yang Zhang

For an $SU(2)\times U(1)$-invariant $S^3$ boundary the classical Dirichlet problem of Riemannian quantum gravity is studied for positive-definite regular solutions of the Einstein equations with a negative cosmological constant within…

广义相对论与量子宇宙学 · 物理学 2009-11-10 M. M. Akbar

We consider the Dirichlet problem for the focusing NLS equation on the half-line, with given Schwartz initial data and boundary data $q(0,t)$ equal to an exponentially decaying perturbation $u(t)$ of the periodic boundary data $ a…

偏微分方程分析 · 数学 2026-01-06 S. Kamvissis , A. S. Fokas

We consider the linearized electrical impedance tomography problem in two dimensions on the unit disk. By a linearization around constant coefficients and using a trigonometric basis, we calculate the linearized Dirichlet-to-Neumann…

数值分析 · 数学 2017-06-08 Stefan Kindermann

This paper considers to the problems of diffraction of electromagnetic waves on a half-plane, which has a finite inclusion in the form of a Lipschitz curve. The diffraction problem formulated as boundary value problem for Helmholtz…

数学物理 · 物理学 2018-03-06 E. Lipachev

This paper investigates the Dirichlet problem for a non-divergence form elliptic operator $L$ in a bounded domain of $\mathbb{R}^d$. Under certain conditions on the coefficients of $L$, we first establish the existence of a unique Green's…

偏微分方程分析 · 数学 2025-04-09 Hongjie Dong , Dong-ha Kim , Seick Kim

In this paper, we derive a Reilly formula for differential forms on weighted manifolds with nonempty boundary. As an application of this formula, we prove a Poincar\'e-type inequality in the same context and explore several of its…

微分几何 · 数学 2025-12-08 Fida El Chami , Ola Makhoul

This work derives explicit series reversions for the solution of Calder\'on's problem. The governing elliptic partial differential equation is $\nabla\cdot(A\nabla u)=0$ in a bounded Lipschitz domain and with a matrix-valued coefficient.…

偏微分方程分析 · 数学 2022-08-24 Henrik Garde , Nuutti Hyvönen

In this paper we prove a general uniqueness result in the inverse boundary value problem for the weighted p-Laplace equation in the plane, with smooth weights. We also prove a uniqueness result in dimension 3 and higher, for real analytic…

偏微分方程分析 · 数学 2025-09-16 Cătălin I. Cârstea , Ali Feizmohammadi

We relax the regularity condition on potentials of Schr\"odinger equations in the uniqueness results in \cite{EB} and \cite{IY2} for the inverse boundary value problem of determining a potential by Dirichlet-to-Neumann map.

数学物理 · 物理学 2012-08-21 Oleg Yu. Imanuvilov , Masahiro Yamamoto