Artículos de revistas
Nonlinear problems with solutions exhibiting a free boundary on the boundary
Registro en:
Annales De L Institut Henri Poincare-analyse Non Lineaire. Gauthier-villars/editions Elsevier, v. 22, n. 3, n. 303, n. 330, 2005.
0294-1449
WOS:000229172800003
10.1016/j.anihpc.2004.07.006
Autor
Davila, J
Montenegro, M
Institución
Resumen
We prove existence of nonnegative solutions to -Delta u + u = 0 on a smooth bounded domain Omega subject to the singular boundary derivative condition partial derivative u/partial derivative v = -u(-beta) + lambda f (x, u) on partial derivative Omega boolean AND {u > 0} with 0 < beta < 1. There is a constant lambda* such that for 0 < lambda < lambda* every nonnegative solution vanishes on a subset of the boundary with positive surface measure. For lambda > lambda* we show the existence of a maximal positive solution. We analyze its linearized stability and its regularity. Minimizers of the energy functional related to the problem are shown to be regular and satisfy the equation together with the boundary condition. (c) 2005 Elsevier SAS. All rights reserved. 22 3 303 330