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Mostrando ítems 41-50 de 68
Artículo
Unilateral global bifurcation for a class of quasilinear elliptic systems and applications
(Elsevier, 2019-06)
In this paper we establish a unilateral bifurcation result for a class of quasilinear elliptic system strongly coupled, extending the bifurcation theorem of [J. López-Gómez. Nonlinear eigenvalues and global bifurcation ...
Artículo
Algunos modelos de la dinámica de poblaciones
(Sociedad Española de Matemática Aplicada, 2002)
En este trabajo presentamos el estudio teórico de algunos modelos de ecuaciones en derivadas parciales que aparecen en la modelización de la dinámica de poblaciones
Artículo
The competition between incoming and outgoing fluxes in an elliptic problem
(World Scientific, 2007)
In this work we consider existence and uniqueness of positive solutions to the elliptic equation −∆u = λu in Ω, with the nonlinear boundary conditions ∂u ∂ν = u p on Γ1, ∂u ∂ν = −u q on Γ2, where Ω is a smooth bounded ...
Artículo
On the existence of dead cores for degenerate Lotka-Volterra models
(Cambridge University Press, 2000-08)
In this work we study the existence, uniqueness and qualitative properties of nonnegative solutions of the Lotka-Volterra models with nonlinear diffusion under homogeneous Dirichlet boundary conditions. We consider the ...
Artículo
Nonnegative solutions for the degenerate logistic indefinite sublinear equation
(Elsevier, 2003-01)
The goal of this paper is to study the nonnegative steady-states solutions of the degenerate logistic indefinite sublinear problem. We combine bifurcation method and linking local subsupersolution technique to show the ...
Artículo
Nonlinear age-dependent diffusive equations: a bifurcation approach
(Elsevier, 2008-05-01)
The main goal of this paper is the study of the existence and uniqueness of positive solutions of some nonlinear age-dependent diffusive models, arising from dynamic populations. We use bifurcation method, for which it has ...
Artículo
Relating disease and predation: equilibria of an epidemic model
(Wiley, 2005)
In this paper, we would like compare the spread of an infectious disease in a population without the influence of a predator and under its influence. We show that it is possible to control an epidemic in a population with ...
Artículo
A variational approach to a nonlocal elliptic problem with sign-changing nonlinearity
(De Gruyter, 2011-05)
Artículo
Multiplicity results for an anisotropic equation with subcritical or critical growth
(De Gruyter, 2015-05)
In this work we show some multiplicity results for the anisotropic equation − XN i=1 ∂ ∂xi ∂u ∂xi pi−2 ∂u ∂xi = gλ(u) in Ω, and u = 0 on ∂Ω, where Ω ⊂ℝN is a bounded smooth domain, 1 < p1 ≤ p2 ≤ . . . ≤ pN and λ is a ...