In this paper we generalize the
classical stable manifold theorem at a point as well as a recent result of M.
Hirsch, C. Pugh and M. Shub. We deduce the existence of the invariant
manifolds, their smoothness and their continuity under small perturbations of the
underlying endomorphism entirely from the inverse function theorem and
an easy proposition about smoothness of maps on c0(E). The constructive
nature of our proof has the advantage of ready adaptation to numerical
methods.