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# Grobman-Hartman theorems for diffeomorphisms of Banach spaces over valued fields

## Abstract

Consider a local diffeomorphism f of an ultrametric Banach space over an ultrametric field, around a hyperbolic fixed point x. We show that, locally, the system is topologically conjugate to the linearized system. An analogous result is obtained for local diffeomorphisms of real p-Banach spaces (like l^p) for 0 < p =< 1. More generally, we obtain a local linearization if f is merely a local homeomorphism which is strictly differentialble at a hyperbolic fixed point x. Also a new global version of the Grobman-Hartman theorem is provided. It applies to Lipschitz perturbations of hyperbolic automorphisms of Banach spaces over valued fields. The local conjugacies H constructed are not only homeomorphisms, but H and H^{-1} are Hoelder. We also study the dependence of H and H^{-1} on f (keeping x and f'(x) fixed).Comment: LaTeX; v2: 33 pages, discussion of parameter dependence of local conjugacies added, some minor correction

## Full text

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1206.6717oai:arXiv.org:1206.6717
Last time updated on July 5, 2012View original full text link

This paper was published in arXiv.org e-Print Archive.

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