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Mostrando ítems 21-30 de 68
Artículo
A logistic equation with degenerate diffusion and Robin boundary condition
(American Institute of Mathematical Sciences, 2008-09)
In this paper we study a model for a species confined in a bounded region. This species diffuses slowly, follows a logistic law in the habitat and there is a flux of population across the boundary of the habitat. Basically, ...
Artículo
Análisis de algunos modelos de dinámica de poblaciones no lineales estructurados en edad y espacio
(Sociedad Española de Matemática Aplicada, 2005)
En este trabajo estudiamos modelos de la dinámica de poblaciones estructurados en edad con difusión. Construiremos un método de subsupersolución y veremos que, efectivamente, bajo la hipótesis de la existencia de un par ...
Artículo
On the symbiotic Lotka–Volterra model with diffusion and transport effects
(Elsevier, 2000-01-01)
In this work we analyze the existence, stability and multiplicity of coexistence states for a symbiotic Lotka-Volterra model with general diffusivities and transport effects. Global bifurcation theory, blowing up arguments ...
Artículo
Combining linear and fast diffusion in a nonlinear elliptic equation
(Springer, 2017-02)
In this paper we analyse an elliptic equation that combines linearand nonlinear fast diffusion with a logistic type reaction function. We proveexistence and non-existence results of positive solutions using bifurcation ...
Artículo
Biodiversity and vulnerability in a 3D mutualistic system
(American Institute of Mathematical Sciences, 2014-10)
In this paper we study a three dimensional mutualistic model of two plants in competition and a pollinator with cooperative relation with plants. We compare the dynamical properties of this system with the associated ...
Artículo
Characterization of non-autonomous attractors of a perturbed infinite-dimensional gradient system
(Elsevier, 2007-05-15)
In this paper we determine the exact structure of the pullback attractors in non-autonomous problems that are perturbations of autonomous gradient systems with attractors that are the union of the unstable manifolds of a ...
Artículo
Uniqueness of solution for elliptic problems with non-linear boundary conditions
(International Publications, 2006-07)
In this paper we present results of uniqueness for an elliptic problem with nonlinear boundary conditions.
Artículo
A non-local perturbation of the logistic equation in IR N
(Elsevier, 2019-10)
A logistic equation in the whole space is considered. In this problem, a non-local perturbation is included. We establish a new sub-supersolution method forgeneral nonlocal elliptic equations and, consequently, we obtain ...
Artículo
Lotka-Volterra models with fractional diffusion
(Cambridge University Press, 2017-06)
In this paper we study the Lotka-Volterra models with fractional Laplacian. For that, we study in detail the logistic problem and show that the sub-supersolution method works for the scalar problem and in case of systems ...
Artículo
Study of a nonlinear Kirchhoff equation with non-homogeneous material
(Elsevier, 2014-08-15)
In this paper we study a non-homogeneous elliptic Kirchhoff equation with nonlinear reaction term. We analyze the existence and uniqueness of positive solution. The main novelty is the inclusion of non-homogeneous term ...