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This paper investigates the Keller-Segel model with quadratic cellular diffusion over a disk in $\mathbb R^2$ with a focus on the formation of its nontrivial patterns. We obtain explicit formulas of radially symmetric stationary solutions…

偏微分方程分析 · 数学 2019-11-07 Lin Chen , Fanze Kong , Qi Wang

We prove partial regularity of stationary solutions and minimizers $u$ from a set $\Omega\subset \mathbb R^n$ to a Riemannian manifold $N$, for the functional $\int_\Omega F(x,u,|\nabla u|^2) dx$. The integrand $F$ is convex and satisfies…

微分几何 · 数学 2017-08-21 Zahra Sinaei

In this paper we prove the global in time solvability of the continuous growth--fragmentation--coagulation equation with unbounded coagulation kernels, in spaces of functions having finite moments of sufficiently high order. The main tool…

偏微分方程分析 · 数学 2021-04-28 Jacek Banasiak , Wilson Lamb

In this paper we study two models for crowd motion and herding. Each of the models is of Keller-Segel type and involves two parabolic equations, one for the evolution of the density and one for the evolution of a mean field potential. We…

偏微分方程分析 · 数学 2016-01-20 Jean Dolbeault , Peter Markowich , Gaspard Jankowiak

We consider weak non-negative solutions to the stochastic partial differential equation \[ \partial_t Y(t,x) = \Delta Y(t,x) + Y(t,x)^\gamma \dot{L}(t,x), \] for $(t,x) \in \mathbb{R}_+ \times \mathbb{R}^d$, where $\gamma > 0$ and $\dot{L}$…

概率论 · 数学 2025-08-12 Thomas Hughes

We study the large time behavior of the sublinear viscosity solution to a singular Hamilton-Jacobi equation that appears in a critical Coagulation-Fragmentation model with multiplicative coagulation and constant fragmentation kernels. Our…

偏微分方程分析 · 数学 2020-10-02 Hiroyoshi Mitake , Hung V. Tran , Truong-Son Van

In this paper, we provide a systematic way of finding explicit solutions for a class of continuous fragmentation equations with growth or decay in the state space and derive explicit solutions in the cases of constant and linear…

偏微分方程分析 · 数学 2022-04-20 Jacek Banasiak , David Wetsi Poka , Sergey Shindin

In this paper we study the fundamental solution of the equation obtained by the linearisation of the Smoluchowski coagulation equation with the multiplicative kernel $(x y)^{\lambda/2}$ with $\lambda\in (1, 2)$ around the steady state…

数学物理 · 物理学 2009-11-09 M. Escobedo , J. J. L. Velazquez

In this work, we give the general solution sequential linear conformable fractional differential equations in the case of constant coefficients for {\alpha}(\in)(0,1]. In homogeneous case, we use a fractional exponential function which…

经典分析与常微分方程 · 数学 2016-02-04 Emrah Ünal , Ahmet Gökdoğan , Ercan Çelik

In this article we prove the existence of solutions to the singular coagulation equation with multifragmentation. We use weighted $L^1$-spaces to deal with the singularities and to obtain regular solutions. The Smoluchowski kernel is…

数学物理 · 物理学 2013-10-30 Carlos Cueto Camejo , Gerald Warnecke

We study convergence in variation of probability solutions of nonlinear Fokker-Planck-Kolmogorov equations to stationary solutions. We obtain sufficient conditions for the exponential convergence of solutions to the stationary solution in…

概率论 · 数学 2018-01-09 V. I. Bogachev , M. Röckner , S. V. Shaposhnikov

The present paper is concerned with large-time behavior of solutions to an outflow problem for an ideal polytropic model of compressible viscous gases in one-dimensional half space, and with a convergence rate of solutions toward a…

偏微分方程分析 · 数学 2009-12-25 Shuichi Kawashima , Tohru Nakamura , Shinya Nishibata , Peicheng Zhu

In this paper, we study the asymptotic behavior of solutions to a Gas-liquid model with external forces and general pressure law. Under some suitable assumptions on the initial date and $\gamma>1$, if…

偏微分方程分析 · 数学 2015-06-03 Long Fan , Qingqing Liu , Changjiang Zhu

Inertial particles suspended in many natural and industrial flows undergo coagulation upon collisions and fragmentation if their size becomes too large or if they experience large shear. Here we study this coagulation-fragmentation process…

混沌动力学 · 物理学 2009-08-20 Jens C. Zahnow , Rafael D. Vilela , Ulrike Feudel , Tamás Tél

In this article we prove the existence of solutions to the coagulation equation with singular kernels. We use weighted L^1-spaces to deal with the singularities in order to obtain regular solutions. The Smoluchowski kernel is covered by our…

数学物理 · 物理学 2014-01-22 Carlos Cueto Camejo , Robin Gröpler , Gerald Warnecke

The stochastic solution with Gaussian stationary increments is establihsed for the symmetric space-time fractional diffusion equation when $0 < \beta < \alpha \le 2$, where $0 < \beta \le 1$ and $0 < \alpha \le 2$ are the fractional…

统计力学 · 物理学 2016-03-18 Gianni Pagnini , Paolo Paradisi

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

In this work we analyze the existence of solutions to the fractional quasilinear problem, $$ (P) \left\{ \begin{array}{rcll} u_t+(-\Delta )^s u &=&|\nabla u|^{\alpha}+ f &\inn \Omega_T\equiv\Omega\times (0,T),\\ u(x,t)&=&0 &…

偏微分方程分析 · 数学 2021-07-26 Boumediene Abdellaoui , Ireneo Peral , Ana Primo , Fernando Soria

The discrete collisional breakage equation, which captures the dynamics of cluster growth when clusters encounter binary collisions with possible matter transfer, is discussed in this article. The existence of global mass-conserving…

经典分析与常微分方程 · 数学 2023-07-26 Mashkoor Ali , Ankik Kumar Giri , Philippe Laurençot

Using some classical methods of dynamical systems, stability results and asymptotic decay of strong solutions for the complex Ginzburg-Landau equation (CGL), $$ \partial_t u = (a + i\alpha) \Delta u - (b + i \beta) |u|^\sigma u + k u, \,\,…

偏微分方程分析 · 数学 2018-10-01 Simão Correia , Mário Figueira