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We prove that the solution map for a family of non-linear transport equations in $\mathbb{R}^n$, with a velocity field given by the convolution of the density with a kernel that is smooth away from the origin and homogeneous of degree…

偏微分方程分析 · 数学 2024-11-13 Marc Magaña

We prove existence of solutions to a nonlinear transport equation in the plane, for which the velocity field is obtained as the convolution of the classical Cauchy Kernel with the unknown. Even though the initial datum is bounded and…

偏微分方程分析 · 数学 2022-04-05 Albert Clop , Banhirup Sengupta

We prove compactness and hence existence for solutions to a class of non linear transport equations. The corresponding models combine the features of linear transport equations and scalar conservation laws. We introduce a new method which…

偏微分方程分析 · 数学 2011-08-22 Fethi Ben Belgacem , Pierre-Emmanuel Jabin

We prove the persistence of boundary smoothness of vortex patches for a non-linear transport equation in $\mathbb{R}^n$ with velocity field given by convolution of the density with an odd kernel, homogeneous of degree $-(n-1)$ and of class…

偏微分方程分析 · 数学 2023-09-27 J. C. Cantero , J. Mateu , J. Orobitg , J. Verdera

We prove the existence of nonradial classical solutions to the 2D incompressible Euler equations with compact support. More precisely, for any positive integer $k$, we construct compactly supported stationary Euler flows of class…

偏微分方程分析 · 数学 2024-06-10 Alberto Enciso , Antonio J. Fernández , David Ruiz

This work gathers new results concerning the semi-geostrophic equations: existence and stability of measure valued solutions, existence and uniqueness of solutions under certain continuity conditions for the density, convergence to the…

偏微分方程分析 · 数学 2007-05-23 G. Loeper

In this paper, we establish a novel approach to proving existence of non-negative weak solutions for degenerate parabolic equations of fourth order, like the Cahn-Hilliard and certain thin film equations. The considered evolution equations…

偏微分方程分析 · 数学 2014-09-16 Stefano Lisini , Daniel Matthes , Giuseppe Savaré

For any positive integer $k$, we prove the existence of nontrivial $C^k$-smooth uniformly rotating solutions to the 2D incompressible Euler equations with compact spatial support. These solutions, which can be chosen to be small…

偏微分方程分析 · 数学 2025-11-18 Alberto Enciso , Antonio J. Fernández , David Ruiz

Let $\Omega \subset R^n$, $n \geq 3$, be a fixed smooth bounded domain, and let $\gamma$ be a smooth conductivity in $\overline{\Omega}$. Consider a non-zero frequency $\lambda_0$ which does not belong to the Dirichlet spectrum of $L_\gamma…

偏微分方程分析 · 数学 2024-09-23 Thierry Daudé , Bernard Helffer , Niky Kamran , François Nicoleau

We prove quantitative regularity estimates for the solutions to non-linear continuity equations and their discretized numerical approximations on Cartesian grids when advected by a rough force field. This allow us to recover the known…

偏微分方程分析 · 数学 2016-12-01 F. Ben Belgacem , P-E Jabin

We consider a linear integro-differential equation which arises to describe both aggregation-fragmentation processes and cell division. We prove the existence of a solution $(\lb,\U,\phi)$ to the related eigenproblem. Such eigenelements are…

偏微分方程分析 · 数学 2019-02-28 Marie Doumic-Jauffret , Pierre Gabriel

In this paper we study a class of coagulation equations including a source term that injects in the system clusters of size of order one. The coagulation kernel is homogeneous, of homogeneity $\gamma < 1$, such that $K(x,y)$ is…

偏微分方程分析 · 数学 2023-10-03 Iulia Cristian , Marina A. Ferreira , Eugenia Franco , Juan J. L. Velázquez

We study an inhomogeneous coagulation equation that contains a transport term in the spatial variable modeling the sedimentation of clusters. We prove local existence of mass conserving solutions for a class of coagulation kernels for which…

偏微分方程分析 · 数学 2024-04-18 Iulia Cristian , Barbara Niethammer , Juan J. L. Velázquez

This paper investigates two classes of quasilinear and essentially nonlinear integral equations with a sum-difference kernel on the half-line. Such equations arise in various areas of physics, including the theory of radiative transfer in…

泛函分析 · 数学 2025-07-17 A. Kh. Khachatryan , Kh. A. Khachatryan , H. S. Petrosyan

In this paper we consider a large class of fully nonlinear integro-differential equations. The class of our nonlocal operators we consider is not spatial homogeneous and we put mild assumptions on its kernel near zero. We prove the H\"older…

概率论 · 数学 2014-05-12 Jongchun Bae

We prove existence and uniqueness of solutions to a transport equation modelling vehicular traffic in which the velocity field depends non-locally on the downstream traffic density via a discontinuous anisotropic kernel. The result is…

偏微分方程分析 · 数学 2015-10-16 Paola Goatin , Francesco Rossi

We consider a one dimensional periodic forward-backward parabolic equation, regularized by a non-linear fourth order term of order $\epsilon^2\ll 1$. This equation is known in the literature as Cahn-Hilliard equation with degenerate…

偏微分方程分析 · 数学 2015-10-20 Matias G. Delgadino

Recent work has revealed a general procedure for incorporating disorder into the semiclassical model of carrier transport, whereby the predictions of quantum linear response theory can be recovered within a quantum kinetic approach based on…

介观与纳米尺度物理 · 物理学 2025-03-10 M. Mehraeen

We introduce a new variant of the weak optimal transport problem where mass is distributed from one space to the other through unnormalized kernels. We give sufficient conditions for primal attainment and prove a dual formula for this…

泛函分析 · 数学 2024-04-22 Philippe Choné , Nathael Gozlan , Francis Kramarz

This article studies the solutions in H 1 of a steady transport equation with a divergence-free driving velocity that is W 1,$\infty$ , in a two-dimensional bounded polygon. Since the velocity is assumed fully non-homogeneous on the…

偏微分方程分析 · 数学 2016-12-20 Jean-Marie Bernard
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