Journal
INDIANA UNIVERSITY MATHEMATICS JOURNAL
Volume 52, Issue 2, Pages 283-328Publisher
INDIANA UNIV MATH JOURNAL
DOI: 10.1512/iumj.2003.52.2245
Keywords
invariant manifolds; non-resonances; slow manifolds; regularity properties; the parameterization method
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We introduce a method to prove existence of invariant manifolds and, at the same time to find simple polynomial maps which are conjugated to the dynamics on them. As a first application, we consider the dynamical system given by a C-r map F in a Banach space X close to a fixed point: F (x) = Ax + N (x), A linear, N(0) = 0, DN(0) = 0. We show that if X-1 is an invariant subspace of A and A satisfies certain spectral properties, then there exists a unique C-r manifold which is invariant under F and tangent to X-1. When X-1 corresponds to spectral subspaces associated to sets of the spectrum contained in disks around the origin or their complement, we recover the classical (strong) (un)stable manifold theorems. Our theorems, however, apply to other invariant spaces. Indeed, we do not require X-1 to be a spectral subspace or even to have a complement invariant under A.
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