Dynamical Systems Method for solving nonlinear operator equations in Banach spaces

preprint2012arXivOpen access

Abstract

Let F(u)=hF(u)=h be a solvable operator equation in a Banach space XX with a Gateaux differentiable norm. Under minimal smoothness assumptions on FF, sufficient conditions are given for the validity of the Dynamical Systems Method (DSM) for solving the above operator equation. It is proved that the DSM (Dynamical Systems Method) \bee \dot{u}(t)=-A^{-1}_{a(t)}(u(t))[F(u(t))+a(t)u(t)-f],\quad u(0)=u_0,\ %\dot{u}=\frac{d u}{dt}, \eee converges to yy as t→+∞t\to +\infty, for a(t)a(t) properly chosen. Here F(y)=fF(y)=f, and u˙\dot{u} denotes the time derivative.

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