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We consider steady-state diffusion in a bounded planar domain with multiple small targets on a smooth boundary. Using the method of matched asymptotic expansions, we investigate the competition of these targets for a diffusing particle and…

偏微分方程分析 · 数学 2025-11-18 Denis S. Grebenkov , Michael J. Ward

An asymptotic analysis for a system with equation and dynamic boundary condition of Cahn-Hilliard type is carried out as the coefficient of the surface diffusion acting on the phase variable tends to 0, thus obtaining a forward-backward…

偏微分方程分析 · 数学 2021-06-03 Pierluigi Colli , Takeshi Fukao , Luca Scarpa

In the paper we consider boundary -- value problems with rapidly alternating type of boundary conditions, including problems in domains with perforated boundaries. We present the classification of homogenized (limit) problems depending on…

数学物理 · 物理学 2007-05-23 Gregory A. Chechkin , Rustem R. Gadyl'shin

The present paper concerns a space-time homogenization problem for nonlinear diffusion equations with periodically oscillating (in space and time) coefficients. Main results consist of corrector results (i.e., strong convergences of…

偏微分方程分析 · 数学 2022-10-26 Tomoyuki Oka

We introduce a fractional variant of the Cahn-Hilliard equation settled in a bounded domain $\Omega$ of $R^N$ and complemented with homogeneous Dirichlet boundary conditions of solid type (i.e., imposed in the entire complement of…

偏微分方程分析 · 数学 2015-03-06 Goro Akagi , Giulio Schimperna , Antonio Segatti

In this paper we study a one phase free boundary problem for the p(x)-Laplacian with non-zero right hand side. We prove that the free boundary of a weak solution is a C^1 surface in a neighborhood of every free boundary point. We also…

偏微分方程分析 · 数学 2017-02-24 Claudia Lederman , Noemi Wolanski

The existence of positive strong solutions to a homogeneous Dirichlet $p$-Laplacian problem, with reaction sum of a both singular at zero and highly discontinuous nonlinearity and of a discontinuous convection term, is established. Locality…

偏微分方程分析 · 数学 2026-03-17 Umberto Guarnotta , Salvatore A. Marano

In this paper, we discuss initial-boundary value problems for linear diffusion equation with multiple time-fractional derivatives. By means of the Mittag-Leffler function and the eigenfunction expansion, we reduce the problem to an integral…

偏微分方程分析 · 数学 2013-11-12 Zhiyuan Li , Masahiro Yamamoto

This work is concerned with homogenization problems for elliptic equations of the type \[ \begin{cases} \mathfrak{L}_{\delta} u_{\delta} + \lambda u_{\delta} = f_{\delta} \qquad \text{in} \;\; D, \\ \qquad \quad \;\, u = 0 \qquad \,…

偏微分方程分析 · 数学 2025-10-15 Toshihiro Uemura , Adisak Seesanea

Homogenization of a stochastic nonlinear reaction-diffusion equation with a large non- linear term is considered. Under a general Besicovitch almost periodicity assumption on the coefficients of the equation we prove that the sequence of…

概率论 · 数学 2014-08-12 Paul André Razafimandimby , Mamadou Sango , Jean Louis Woukeng

A general reaction-diffusion equation with spatiotemporal delay and homogeneous Dirichlet boundary condition is considered. The existence and stability of positive steady state solutions are proved via studying an equivalent…

偏微分方程分析 · 数学 2021-02-24 Wenjie Zuo , Junping Shi

We study systems of reaction-diffusion equations with discontinuous spatially distributed hysteresis in the right-hand side. The input of hysteresis is given by a vector-valued function of space and time. Such systems describe hysteretic…

偏微分方程分析 · 数学 2013-09-27 Pavel Gurevich , Sergey Tikhomirov

This work discusses the homogenization analysis for diffusion processes on scale-free metric graphs, using weak variational formulations. The oscillations of the diffusion coefficient along the edges of a metric graph induce internal…

偏微分方程分析 · 数学 2016-05-31 Fernando A. Morales , Daniel E. Restrepo

Models of reaction diffusion processes usually employ discrete lattice models with particles interacting at the same site, resulting in localized reactions in the continuum limit. Here, various non-local interactions are considered, and two…

数学物理 · 物理学 2026-03-30 Chris D Greenman

In this work, we study the higher differentiability of solutions to the inhomogeneous fractional $p$-Laplace equation under different regularity assumptions on the data. In the superquadratic case, we extend and sharpen several previous…

偏微分方程分析 · 数学 2024-06-25 Lars Diening , Kyeongbae Kim , Ho-Sik Lee , Simon Nowak

In this paper, we study the diffusive limit of the steady state radiative heat transfer system for non-homogeneous Dirichlet boundary conditions in a bounded domain with flat boundaries. A composite approximate solution is constructed using…

偏微分方程分析 · 数学 2022-11-01 Mohamed Ghattassi , Xiaokai Huo , Nader Masmoudi

Reaction-diffusion processes across layered media arise in several scientific domains such as pattern-forming E. coli on agar substrates, epidermal-mesenchymal coupling in development, and symmetry-breaking in cell polarisation. We develop…

In this paper, we prove the existence and the uniqueness of a weak and mild solution of the following nonlinear parabolic problem involving the porous $p$-fractional Laplacian: \begin{equation*} \begin{cases} \partial_t…

偏微分方程分析 · 数学 2024-11-22 Loïc Constantin , Jacques Giacomoni , Guillaume Warnault

We consider Laplacian in a planar strip with Dirichlet boundary condition on the upper boundary and with frequent alternation boundary condition on the lower boundary. The alternation is introduced by the periodic partition of the boundary…

谱理论 · 数学 2015-05-13 D. Borisov , G. Cardone

We consider a pseudo-differential equation driven by the fractional $p$-Laplacian with $p\ge 2$ (degenerate case), with a bounded reaction $f$ and Dirichlet type conditions in a smooth domain $\Omega$. By means of barriers, a nonlocal…

偏微分方程分析 · 数学 2018-07-26 Antonio Iannizzotto , Sunra Mosconi , Marco Squassina