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We investigate general elliptic boundary-value problems in H\"ormander inner product spaces that form the extended Sobolev scale. The latter consists of all Hilbert spaces that are interpolation spaces with respect to the Sobolev Hilbert…

偏微分方程分析 · 数学 2016-12-30 Anna Anop , Tetiana Kasirenko

We consider a general inhomogeneous parabolic initial-boundary value problem for a $2b$-parabolic differential equation given in a finite multidimensional cylinder. We investigate the solvability of this problem in some generalized…

偏微分方程分析 · 数学 2019-07-10 Valerii Los , Vladimir Mikhailets , Aleksandr Murach

In this paper, we consider the infinite-dimensional integration problem on weighted reproducing kernel Hilbert spaces with norms induced by an underlying function space decomposition of ANOVA-type. The weights model the relative importance…

数值分析 · 数学 2021-09-21 Jan Baldeaux , Michael Gnewuch

Numerical integration over the implicitly defined domains is challenging due to topological variances of implicit functions. In this paper, we use interval arithmetic to identify the boundary of the integration domain exactly, thus getting…

数值分析 · 数学 2024-12-20 Tianhui Yang , Ammar Qarariyah , Hongmei Kang , Jiansong Deng

We prove a lower bound for the number of negative eigenvalues for a Schr\"{o}dinger operator on a Riemannian manifold via the integral of the potential.

微分几何 · 数学 2014-06-03 Alexander Grigor'yan , Nikolai Nadirashvili , Yannick Sire

The theory of random sets is demonstrated to prove useful for the theory of random operators. A random operator is here defined by requiring the graph to be a random set. It is proved that the spectrum and the set of eigenvalues of random…

概率论 · 数学 2019-09-16 Gunnar Taraldsen

Inequalities play an important role in pure and applied mathematics. In particular, Opial inequality plays a main role in the study of the existence and uniqueness of initial and boundary value problems for differential equations. It has…

经典分析与常微分方程 · 数学 2022-04-22 Ana Portilla , José M. Rodríguez , José M. Sigarreta

Inverse reinforcement learning (IRL) is the task of finding a reward function that generates a desired optimal policy for a given Markov Decision Process (MDP). This paper develops an information-theoretic lower bound for the sample…

机器学习 · 计算机科学 2021-07-07 Abi Komanduru , Jean Honorio

Let $\Omega \subset \mathbb{R}^d$ be bounded open and connected. Suppose that $W^{1,2}(\Omega) \subset L^r(\Omega)$ for some $r > 2$. Let $A$ be a pure second-order elliptic differential operator with bounded real measurable coefficients on…

偏微分方程分析 · 数学 2018-11-26 A. F. M. ter Elst , Hannes Meinlschmidt , Joachim Rehberg

The linear PDE ${\mathbf B} {\mathbf L} (\frac{\partial}{\partial x}) u ={\mathbf L}_1(\frac{\partial}{\partial x})u +f(x)$ with nonclassic conditions on boundary $\partial \Omega$ is considered. Here ${\mathbf B}$ is linear noninvertible…

偏微分方程分析 · 数学 2016-10-11 Nikolai Sidorov , Denis Sidorov

We develop an elliptic theory based in $L^2$ of boundary value problems for general wedge differential operators of first order under only mild assumptions on the boundary spectrum. In particular, we do not require the indicial roots to be…

偏微分方程分析 · 数学 2013-10-29 Thomas Krainer , Gerardo A. Mendoza

The method is proposed for the study of many-point boundary value problems for systems of nonlinear ODE, by reducing them to special equivalent integral equations, and allows us [in contrast with the known method [1]] to consider boundary…

经典分析与常微分方程 · 数学 2012-05-11 Yu. A. Konyaev

In this paper we develop a reconstruction algorithm for the solution of an inverse boundary value problem dealing with a semilinear elliptic partial differential equation of interest in cardiac electrophysiology. The goal is the detection…

偏微分方程分析 · 数学 2017-03-08 Elena Beretta , Andrea Manzoni , Luca Ratti

The present paper is intended to provide the basis for the study of weakly differentiable functions on rectifiable varifolds with locally bounded first variation. The concept proposed here is defined by means of integration by parts…

微分几何 · 数学 2016-07-19 Ulrich Menne

We study properties of pseudodifferential operators which arise in their use in boundary value problems. Smooth domains as well as intersections of smooth domains are considered.

复变函数 · 数学 2022-05-03 Dariush Ehsani

We consider the problem of minimizing variational integrals defined on \cc{nonlinear} Sobolev spaces of competitors taking values into the sphere. The main novelty is that the underlying energy features a non-uniformly elliptic integrand…

偏微分方程分析 · 数学 2019-03-22 Cristiana De Filippis , Giuseppe Mingione

The main purpose of this paper is to address some questions concerning boundary value problems related to the Laplacian and bi-Laplacian operators, set in the framework of classical $H^s$ Sobolev spaces on a bounded Lipschitz domain of R^N.…

偏微分方程分析 · 数学 2023-06-06 Cherif Amrouche , Mohand Moussaoui

The authors study the Hodge theory of the exterior differential operator $d$ acting on $q$-forms on a smoothly bounded domain in $\RR^{N+1}$, and on the half space $\rnp$. The novelty is that the topology used is not an $L^2$ topology but a…

微分几何 · 数学 2016-09-06 Luigi Fontana , Steven G. Krantz , Marco M. Peloso

We develop the shape derivative analysis of solutions to the problem of scattering of time-harmonic electromagnetic waves by a bounded penetrable obstacle. Since boundary integral equations are a classical tool to solve electromagnetic…

数值分析 · 数学 2010-02-22 Martin Costabel , Frédérique Le Louër

We build a solvability theory of elliptic boundary-value problems in normed Sobolev spaces of generalized smoothness for any integrability exponent $p>1$. The smoothness is given by a number parameter and a supplementary function parameter…

偏微分方程分析 · 数学 2025-10-01 Anna Anop , Aleksandr Murach