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We consider a class of cross diffusion systems with degenerate (or porous media type) diffusion which is inspired by models in mathematical biology/ecology with zero self diffusions. Known techniques for scalar equations are no longer…

偏微分方程分析 · 数学 2019-09-12 Dung Le

The continuous dependence on the initial data and consequently the uniqueness of bounded weak solutions to a class of triangular reaction-cross-diffusion equations is shown. The class includes two-species doubly degenerate equations for…

偏微分方程分析 · 数学 2025-09-29 Xiuqing Chen , Bang Du , Ansgar Jüngel

Bounded weak solutions to a particular class of degenerate parabolic cross-diffusion systems are shown to coincide with the unique strong solution determined by the same initial condition on the maximal existence interval of the latter. The…

偏微分方程分析 · 数学 2022-07-04 Philippe Laurençot , Bogdan-Vasile Matioc

We analyze the mathematical properties of a multi-species biofilm cross-diffusion model together with very general reaction terms and mixed Dirichlet-Neumann boundary conditions on a bounded domain. This model belongs to the class of…

偏微分方程分析 · 数学 2018-05-08 Esther S. Daus , Josipa-Pina Milišić , Nicola Zamponi

The aim of this article is to study a Cahn-Hilliard model for a multicomponent mixture with cross-diffusion effects, degenerate mobility and where only one of the species does separate from the others. We define a notion of weak solution…

偏微分方程分析 · 数学 2020-07-03 Virginie Ehrlacher , Greta Marino , Jan-Frederik Pietschmann

The weak-strong uniqueness for solutions to reaction-cross-diffusion systems in a bounded domain with no-flux boundary conditions is proved. The system generalizes the Shigesada-Kawasaki-Teramoto population model to an arbitrary number of…

偏微分方程分析 · 数学 2018-05-09 Xiuqing Chen , Ansgar Jüngel

Proving the uniqueness of solutions to multi-species cross-diffusion systems is a difficult task in the general case, and there exist very few results in this direction. In this work, we study a particular system with zero-flux boundary…

偏微分方程分析 · 数学 2019-07-25 Judith Berendsen , Martin Burger , Virginie Ehrlacher , Jan-Frederik Pietschmann

The weak-strong uniqueness of solutions to a broad class of cross-diffusion systems with volume filling is established. In general, the diffusion matrices are neither symmetric nor positive definite. This issue is overcome by supposing that…

偏微分方程分析 · 数学 2025-10-01 Maria Heitzinger , Ansgar Jüngel

We study the regularity of weak solutions and the global existence of classical to cross-diffusion systems of $m$ equations on $N$-dimensional domains ($m,N\ge2$).

偏微分方程分析 · 数学 2024-03-05 Dung Le

This paper deals with the existence of global weak solutions for a wide class of (multiple species) cross-diffusions systems. The existence is based on two different ingredients: an entropy estimate giving some gradient control and a…

偏微分方程分析 · 数学 2016-09-28 Thomas Lepoutre , Ayman Moussa

In this contribution we prove the existence of weak solutions to degenerate parabolic systems arising from the coupled moisture movement, transport of dissolved species and heat transfer through partially saturated porous materials.…

偏微分方程分析 · 数学 2017-01-03 Michal Beneš , Lukáš Krupička

We establish the global existence of weak solutions for a two-species cross-diffusion system, set on the 1-dimensional flat torus, in which the evolution of each species is governed by two mechanisms. The first of these is a diffusion which…

偏微分方程分析 · 数学 2025-04-28 Alpár R. Mészáros , Guy Parker

This work addresses the one-dimensional Cauchy problem for the doubly degenerate nutrient taxis model \begin{equation*} \begin{cases} \displaystyle \frac{\partial u}{\partial t} = \frac{\partial}{\partial x}(u v u_x) -…

偏微分方程分析 · 数学 2025-08-12 Federico Herrero-Hervás

We study a generalization of a cross-diffusion problem deduced from a nonlinear complex-variable diffusion model for signal and image denoising. We prove the existence of weak solutions of the time-independent problem with fidelity terms…

偏微分方程分析 · 数学 2024-01-26 Gonzalo Galiano , Julián Velasco

The global-in-time existence of weak solutions to a degenerate Cahn-Hilliard cross-diffusion system with singular potential in a bounded domain with no-flux boundary conditions is proved. The model consists of two coupled parabolic…

偏微分方程分析 · 数学 2024-01-11 Ansgar Jüngel , Yue Li

We consider a recent plate model obtained as a scaled limit of the three dimensional Biot system of poro-elasticity. The result is a "2.5" dimensional linear system that couples traditional Euler-Bernoulli plate dynamics to a pressure…

偏微分方程分析 · 数学 2021-05-27 Elena Gurvich , Justin T. Webster

The global in time existence of weak solutions to a cross-diffusion system with fractional diffusion in the whole space is proved. The equations describe the evolution of multi-species populations in the regime of large-distance…

偏微分方程分析 · 数学 2022-03-21 Ansgar Jüngel , Nicola Zamponi

We establish weak-strong uniqueness and stability properties of renormalised solutions to a class of energy-reaction-diffusion systems. The systems considered are motivated by thermodynamically consistent models, and their formal entropy…

偏微分方程分析 · 数学 2022-05-03 Katharina Hopf

A cross-diffusion system describing ion transport through biological membranes or nanopores in a bounded domain with mixed Dirichlet-Neumann boundary conditions is analyzed. The ion concentrations solve strongly coupled diffusion equations…

偏微分方程分析 · 数学 2017-06-23 Anita Gerstenmayer , Ansgar Jüngel

The global existence of bounded weak solutions to a diffusion system modeling biofilm growth is proven. The equations consist of a reaction-diffusion equation for the substrate concentration and a fourth-order Cahn-Hilliard-type equation…

偏微分方程分析 · 数学 2023-07-20 Christoph Helmer , Ansgar Jüngel
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