Differential and Integral Equations

Smooth bifurcation for variational inequalities based on Lagrange multipliers

Abstract

We prove a bifurcation theorem of Crandall-Rabinowitz type (local bifurcation of smooth families of nontrivial solutions) for general variational inequalities on possibly nonconvex sets with infinite-dimensional bifurcation parameter. The result is based on local equivalence of the inequality to a smooth equation with Lagrange multipliers, on scaling techniques and on an application of the implicit function theorem. As an example, we consider a semilinear elliptic PDE with nonconvex unilateral integral conditions on the boundary of the domain.

Article information

Source
Differential Integral Equations, Volume 19, Number 9 (2006), 981-1000.

Dates
First available in Project Euclid: 21 December 2012