Converses to the Ω-stability and invariant lamination theorems

Author:

Gottlieb Allan

Abstract

In 1967 Smale proved that for diffeomorphisms on closed smooth manifolds, Axiom A {\text {A}} and no cycles are sufficient conditions for Ω \Omega -stability and asserted the analogous theorem for vectorfields. Pugh and Shub have supplied a proof of the latter. Since then a major problem in dynamical systems has been Smale’s conjecture that Axiom A {\text {A}} (resp. A’ {\text {A’}} ) and no cycles are necessary as well as sufficient for Ω \Omega -stability of diffeomorphisms (resp. vectorfields). Franks and Guckenheimer have worked on the diffeomorphism problem by strengthening the definition of Ω \Omega -stable diffeomorphisms. In this paper it will be shown that an analogous strengthening of Ω \Omega -stable vectorfields forces Smale’s conditions to be necessary. The major result of this paper is the following THEOREM. If ( Λ , L ) (\Lambda ,L) is a compact laminated set, N N is a normal bundle to the lamination, and f f is an absolutely and differentiably L L -stable diffeomorphism of a closed smooth manifold then ( id -  f # ¯ ) : C 0 ( N ) C 0 ( N ) ({\text {id - }}\overline {{f_\# }} ):{C^0}(N) \to {C^0}(N) is surjective. If the lamination is just a compact submanifold, the theorem is already new. When applied to flows, this theorem gives the above result on Ω \Omega -stable vectorfields.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,General Mathematics

Reference22 articles.

1. A setting for global analysis;Eells, James, Jr.;Bull. Amer. Math. Soc.,1966

2. Differentiably Ω-stable diffeomorphisms;Franks, John;Topology,1972

3. Absolutely Ω-stable diffeomorphisms;Guckenheimer, John;Topology,1972

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