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We discuss the radiation problem of total reflection for a time-harmonic generalized Maxwell system in a non-smooth exterior domain with non-smooth inhomogeneous, anisotropic coefficients converging near infinity with a certain rate towards…

偏微分方程分析 · 数学 2011-05-23 Dirk Pauly

This paper treats the time-harmonic electro-magnetic scattering or radiation problem governed by Maxwell's equations in an exterior weak Lipschitz domain divided into two disjoint weak Lipschitz parts We will present a solution theory using…

偏微分方程分析 · 数学 2019-04-30 Frank Osterbrink , Dirk Pauly

We study real resonances and embedded eigenvalues of the Kramers--Fokker--Planck operator with a long-range potential. We prove that thresholds are only possible accumulation points of eigenvalues and that the limiting absorption principle…

偏微分方程分析 · 数学 2024-06-11 Xue Ping Wang

In this paper we consider the transmission eigenvalue problem for Maxwell's equations corresponding to non-magnetic inhomogeneities with contrast in electric permittivity that changes sign inside its support. We formulate the transmission…

偏微分方程分析 · 数学 2015-06-02 Fioralba Cakoni , Houssem Haddar , Shixu Meng

We establish sharp long time asymptotic behaviour for a family of entropies to defective Fokker-Planck equations and show that, much like defective finite dimensional ODEs, their decay rate is an exponential multiplied by a polynomial in…

偏微分方程分析 · 数学 2018-02-14 Anton Arnold , Amit Einav , Tobias Wöhrer

The homogenization of eigenvalues of non-Hermitian Maxwell operators is studied by the H-convergence method. It is assumed that the Maxwell systems are equipped with suitable m-dissipative boundary conditions, namely, with Leontovich or…

偏微分方程分析 · 数学 2026-01-23 Matthias Eller , Illya M. Karabash

We prove resolvent estimates in $L^p$-spaces for time-harmonic Maxwell's equations in two spatial dimensions and in three dimensions in the partially anisotropic case. In the two-dimensional case the estimates are sharp up to endpoints. We…

偏微分方程分析 · 数学 2022-12-26 Robert Schippa

We study the quasilinear Maxwell system with a strictly positive, state dependent boundary conductivity. For small data we show that the solution exists for all times and decays exponentially to $0$. As in related literature we assume a…

偏微分方程分析 · 数学 2026-01-15 Richard Nutt , Roland Schnaubelt

We study the limiting absorption principle and the well-posedness of Maxwell equations with anisotropic sign-changing coefficients in the time-harmonic domain. The starting point of the analysis is to obtain Cauchy problems associated with…

偏微分方程分析 · 数学 2025-04-02 Hoai Minh Nguyen , Swarnendu Sil

In this paper we continue our study of the Laplacian on manifolds with axial analytic asymptotically cylindrical ends initiated in~arXiv:1003.2538. By using the complex scaling method and the Phragm\'{e}n-Lindel\"{o}f principle we prove…

谱理论 · 数学 2010-07-27 Victor Kalvin

This work is on the numerical approximation of incoming solutions to Maxwell's equations with dissipative boundary conditions whose energy decays exponentially with time. Such solutions are called asymptotically disappearing (ADS) and they…

数值分析 · 数学 2013-07-23 James H. Adler , Vesselin Petkov , Ludmil T. Zikatanov

In this work we investigate the L^p-L^q-mapping properties of the resolvent associated with the time-harmonic isotropic Maxwell operator. As spectral parameters close to the spectrum are also covered by our analysis, we obtain an…

偏微分方程分析 · 数学 2021-08-26 Lucrezia Cossetti , Rainer Mandel

In this paper we consider the transmission eigenvalue problem for Maxwell's equations corresponding to non-magnetic inhomogeneities with contrast in electric permittivity that has fixed sign (only) in a neighborhood of the boundary. We…

偏微分方程分析 · 数学 2021-04-05 Houssem Haddar , Shixu Meng

We continue the study of the operator of generalized Maxwell equations and completely discover the behavior of the solutions of the time-harmonic equations as the frequency tends to zero. Thereby, we identify degenerate operators in terms…

偏微分方程分析 · 数学 2011-05-23 Dirk Pauly

We consider the massive scalar field equation $\Box_{g_{RN}} \phi = m^2 \phi$ on any subextremal Reissner--Nordstr\"{o}m exterior metric $g_{RN}$. We prove that solutions with localized initial data decay pointwise-in-time at the polynomial…

广义相对论与量子宇宙学 · 物理学 2024-01-02 Yakov Shlapentokh-Rothman , Maxime Van de Moortel

This paper is concerned with the time-dependent Maxwell's equations for a plane interface between a negative material described by the Drude model and the vacuum, which fill, respectively, two complementary half-spaces. In a first paper, we…

偏微分方程分析 · 数学 2021-10-14 Maxence Cassier , Christophe Hazard , Patrick Joly

We prove a polynomial energy decay for the Maxwell's equations with Ohm's law on partially cubic domains with trapped rays.

偏微分方程分析 · 数学 2011-02-15 Kim Dang Phung

We consider a quasilinear nonhomogeneous, anisotropic Maxwell system in a bounded smooth domain of $\mathbb{R}^{3}$ with a strictly positive conductivity subject to the boundary conditions of a perfect conductor. Under appropriate…

偏微分方程分析 · 数学 2018-10-31 Irena Lasiecka , Michael Pokojovy , Roland Schnaubelt

In this paper we partially settle our conjecture from [1] (math.SP/0701143) on roots of eigenpolynomials for degenerate exactly-solvable operators. Namely, for any such operator, we establish a lower bound (which supports our conjecture)…

谱理论 · 数学 2007-05-23 Tanja Bergkvist , Jan-Erik Bjork

In this article we study the pointwise decay properties of solutions to the Maxwell system on a class of nonstationary asymptotically flat backgrounds in three space dimensions. Under the assumption that uniform energy bounds and a weak…

偏微分方程分析 · 数学 2017-06-26 Jason Metcalfe , Daniel Tataru , Mihai Tohaneanu
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