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Higher dimensional, static, cylindrically symmetric vacuum solutions with and without a cosmological constant in the Brans-Dicke theory are presented. We show that, for a negative cosmological constant and for specific values of the…

广义相对论与量子宇宙学 · 物理学 2014-11-20 Ahmet Baykal , Dilek K. Ciftci , Ozgur Delice

In a smoothly bounded domain $\Omega \subset \mathbb{R}^N$ $(N\in \mathbb{N})$, a no-flux initial-boundary value problem for the degenerate chemotaxis system with volume-filling effects, \begin{align*} u_t = \nabla \cdot (D(u,v) \nabla u -…

偏微分方程分析 · 数学 2026-04-10 Osuke Shibata , Tomomi Yokota

This paper approaches the question of existence and uniqueness of stationary solutions to a semilinear hyperbolic-parabolic system and the study of the asymptotic behaviour of global solutions. The system is a model for some biological…

偏微分方程分析 · 数学 2017-07-11 Francesca Romana Guarguaglini

In this paper, we consider a model with tumor microenvironment involving nutrient density, extracellular matrix and matrix-degrading enzymes, which satisfy a coupled system of PDEs with a free boundary. For this coupled parabolic-hyperbolic…

偏微分方程分析 · 数学 2018-08-24 Rui Li , Bei Hu

This paper is concerned with the global existence and stability of solution to the quasi linear hyperbolic-parabolic chemotaxis system on the half-line,which was proposed in[1] to primarily describe the formation of coherent vascular…

偏微分方程分析 · 数学 2025-09-25 Nangao Zhang

We establish the asymptotic completeness in the nonlinear Lamb system for hyperbolic stationary states. For the proof we construct a trajectory of a reduced equation (which is a nonlinear nonautonomous ODE) converging to a hyperbolic…

数学物理 · 物理学 2015-06-05 A. I. Komech , A. E. Merzon

We consider the existence of radially symmetric stationary solutions of the compressible viscous and heat-conductive polytropic ideal fluid on the unbounded exterior domain of a sphere where the boundary and far-field conditions are…

偏微分方程分析 · 数学 2025-07-08 Itsukoo Hashimoto , Akitaka Matsumura

We prove the existence and uniqueness of stationary spherically symmetric positive solutions for the Schr\"{o}dinger-Newton model in any space dimension $d$. Our result is based on an analysis of the corresponding system of second order…

数学物理 · 物理学 2008-02-13 Philippe Choquard , Joachim Stubbe , Marc Vuffray

We study a hyperbolic-parabolic model of chemotaxis in dimensions one and two. In particular, we prove the global existence of classical solutions in certain dissipation regimes.

偏微分方程分析 · 数学 2016-12-12 Rafael Granero-Belinchón

We consider a general hyperbolic model of chemotaxis in the multidimensional case. For this system we show the global existence of smooth solutions to the Cauchy problem and we determine their asymptotic behavior. Since this model does not…

偏微分方程分析 · 数学 2014-08-12 Cristiana Di Russo

We introduce a numerical scheme to approximate a quasi-linear hyperbolic system which models the movement of cells under the influence of chemotaxis. Since we expect to find solutions which contain vacuum parts, we propose an upwinding…

数值分析 · 数学 2012-11-19 Roberto Natalini , Magali Ribot , Monika Twarogowska

An Euler-type hyperbolic-parabolic system of chemotactic aggregation describing the vascular network formation is investigated in the critical regularity setting. For small initial data around a constant equilibrium state, the…

偏微分方程分析 · 数学 2023-03-17 Timothée Crin-Barat , Qingyou He , Ling-Yun Shou

For hyperbolic first-order systems of linear partial differential equations (master equations), appearing in description of kinetic processes in physics, biology and chemistry we propose a new procedure to obtain their complete closed-form…

偏微分方程分析 · 数学 2007-05-23 E. I. Ganzha , V. M. Loginov , S. P. Tsarev

We consider a system of reaction-diffusion equations in a bounded interval of the real line, with emphasis on the metastable dynamics, whereby the time-dependent solution approaches its steady state in an asymptotically exponentially long…

偏微分方程分析 · 数学 2016-06-27 Marta Strani

In this paper we aim to find the stationary stochastic viscosity solutions of a parabolic type SPDEs through the infinite horizon backward doubly stochastic differential equations (BDSDEs). For this, we study the existence, uniqueness and…

概率论 · 数学 2009-11-17 Qi Zhang

Given $\beta\in\mathbb{R}$ and $\varrho,k>0$, we analyze an abstract version of the nonlinear stationary model in dimensionless form $$\begin{cases} u"" - \Big(\beta+ \varrho\int_0^1 |u'(s)|^2\,{\rm d} s\Big)u" +k(u-v) = 0 v"" - \Big(\beta+…

偏微分方程分析 · 数学 2016-07-15 Filippo Dell'Oro , Claudio Giorgi , Vittorino Pata

In this paper, we are concerned with a quasi-linear hyperbolic-parabolic system of persistence and endogenous chemotaxis modelling vasculogenesis in $\mathbb{R}$. Under some suitable structural assumption on the pressure function, we first…

偏微分方程分析 · 数学 2021-11-18 Qingqing Liu , Hongyun Peng , Zhi-An Wang

A general system of n ordinary differential equations coupled with one reaction-diffusion equation, considered in a bounded N-dimensional domain, with no-flux boundary condition is studied in a context of pattern formation. Such initial…

偏微分方程分析 · 数学 2023-04-14 Szymon Cygan , Grzegorz Karch , Anna Marciniak-Czochra , Kanako Suzuki

We find a 4+1 dimensional stationary vacuum hyper-cylindrical solution solution which is spherically symmetric in $3-$dimensions and invariant under the translation along the fifth coordinate. The solution is characterized by three…

高能物理 - 理论 · 物理学 2008-11-26 Jungjai Lee , Hyeong-Chan Kim

The global existence of smooth solutions to the vacuum free boundary problem with physical singularity of compressible Euler equations with damping and gravity is proved in space dimensions $n=1, 2, 3$, for the initial data being small…

偏微分方程分析 · 数学 2021-10-29 Huihui Zeng
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