Results 11 to 20 of about 241 (34)

The fractional Keller-Segel model [PDF]

open access: yes, 2006
The Keller-Segel model is a system of partial differential equations modelling chemotactic aggregation in cellular systems. This model has blowing up solutions for large enough initial conditions in dimensions d >= 2, but all the solutions are regular in
Brenner M P   +9 more
core   +1 more source

Evolution Equations governed by Lipschitz Continuous Non-autonomous Forms [PDF]

open access: yes, 2014
We prove $L^2$-maximal regularity of linear non-autonomous evolutionary Cauchy problem \begin{equation}\label{eq00}\nonumber \dot{u} (t)+A(t)u(t)=f(t) \hbox{ for }\ \hbox{a.e.
Laasri, Hafida, Sani, Ahmed
core   +3 more sources

Backward blow-up estimates and initial trace for a parabolic system of reaction-diffusion [PDF]

open access: yes, 2010
In this article we study the positive solutions of the parabolic semilinear system of competitive type \[ \left\{\begin{array} [c]{c}% u_{t}-\Delta u+v^{p}=0, v_{t}-\Delta v+u^{q}=0, \end{array} \right.
Bidaut-Véron, Marie-Françoise   +2 more
core   +3 more sources

A cross-diffusion system derived from a Fokker-Planck equation with partial averaging [PDF]

open access: yes, 2016
A cross-diffusion system for two compoments with a Laplacian structure is analyzed on the multi-dimensional torus. This system, which was recently suggested by P.-L.
Jüngel, Ansgar, Zamponi, Nicola
core   +3 more sources

Non-simultaneous quenching in a system of heat equations coupled at the boundary [PDF]

open access: yes, 2006
We study the solutions of a parabolic system of heat equations coupled at the boundary through a nonlinear flux. We characterize in terms of the parameters involved when nonsimultaneous quenching may appear.
de Pablo, Arturo   +3 more
core   +1 more source

Uniform boundedness and global existence of solutions for reaction-diffusion systems with a balance law and a full matrix of diffusion coefficients [PDF]

open access: yes, 2001
The purpose of this paper is to prove uniform boundedness and so global existence of solutions for reaction-diffusion systems with a full matrix of diffusion coefficients satisfying a balance law.
Kouachi, S.
core   +2 more sources

Coupling the Stokes and Navier-Stokes equations with two scalar nonlinear parabolic equations [PDF]

open access: yes, 1999
This work deals with a system of nonlinear parabolic equations arising in turbulence modelling. The unknowns are the N components of the velocity field u coupled with two scalar quantities θ and ϕ. The system presents nonlinear turbulent viscosity A(θ, ϕ)
Gómez Mármol, María Macarena   +1 more
core   +1 more source

Classical solutions of drift-diffusion equations for semiconductor devices: the 2d case [PDF]

open access: yes, 2006
We regard drift-diffusion equations for semiconductor devices in Lebesgue spaces. To that end we reformulate the (generalized) van Roosbroeck system as an evolution equation for the potentials to the driving forces of the currents of electrons and holes.
Kaiser, Hans-Christoph   +2 more
core   +3 more sources

Uniqueness of transverse solutions for reaction-diffusion equations with spatially distributed hysteresis

open access: yes, 2012
The paper deals with reaction-diffusion equations involving a hysteretic discontinuity in the source term, which is defined at each spatial point. Such problems describe biological processes and chemical reactions in which diffusive and nondiffusive ...
Gurevich, Pavel, Tikhomirov, Sergey
core   +1 more source

Long-time behavior of an angiogenesis model with flux at the tumor boundary [PDF]

open access: yes, 2012
This paper deals with a nonlinear system of partial differential equations modeling a simplified tumor-induced angiogenesis taking into account only the interplay between tumor angiogenic factors and endothelial cells.
A. Kettemann   +12 more
core   +3 more sources

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