A nonlinear singular perturbation problem

Details A nonlinear singular perturbation problem A nonlinear singular perturbation problem

2004-05-03

arxiv.org/abs/math-ph/0405001v1

Physics

Mathematical Physics

Scientific paper

Let F(u_\ve)+\ve(u_\ve-w)=0 \eqno{(1)} where $F$ is a nonlinear operator in a Hilbert space $H$, $w\in H$ is an element, and $\ve>0$ is a parameter. Assume that $F(y)=0$, and $F'(y)$ is not a boundedly invertible operator. Sufficient conditions are given for the existence of the solution to \eqref{e1.1} and for the convergence $\lim_{\ve\to 0}\|u_\ve-y\|=0$. An example of applications is considered. In this example $F$ is a nonlinear integral operator.

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