Biblioteca de la Universidad Complutense de Madrid

Rapidly varying boundaries in equations with nonlinear boundary conditions. The case of a Lipschitz deformation

Impacto



Arrieta Algarra, José María y Bruschi, Simone M. (2007) Rapidly varying boundaries in equations with nonlinear boundary conditions. The case of a Lipschitz deformation. Mathematical Models and Methods in Applied Sciences, 17 (10). pp. 1555-1585. ISSN 0218-2025

[img]
Vista previa
PDF
345kB

URL Oficial: http://www.worldscinet.com/m3as/m3as.shtml



Resumen

We continue the analysis started in [3] and announced in [2], studying the behavior of solutions of nonlinear elliptic equations Delta u + f(x, u) = 0 in Omega(epsilon) with nonlinear boundary conditions of type partial derivative u/partial derivative n + g(x, u) = 0, when the boundary of the domain varies very rapidly. We show that if the oscillations are very rapid, in the sense that, roughly speaking, its period is much smaller than its amplitude and the function g is of a dissipative type, that is, it satisfies g(x, u)u >= b vertical bar u vertical bar(d+1), then the boundary condition in the limit problem is u = 0, that is, we obtain a homogeneus Dirichlet boundary condition. We show the convergence of solutions in H(1) and C(0) norms and the convergence of the eigenvalues and eigenfunctions of the linearizations around the solutions. Moreover, if a solution of the limit problem is hyperbolic (non degenerate) and some extra conditions in g are satisfied, then we show that there exists one and only one solution of the perturbed problem nearby.


Tipo de documento:Artículo
Palabras clave:Varying boundary; Oscillations; Nonlinear boundary conditions; Elliptic equations
Materias:Ciencias > Matemáticas > Ecuaciones diferenciales
Código ID:13921
Depositado:18 Nov 2011 08:13
Última Modificación:06 Feb 2014 09:55

Sólo personal del repositorio: página de control del artículo