Affordable Access

Dominated splittings for semi-invertible operator cocycles on Hilbert space

Authors
  • Morris, Ian D.
Type
Preprint
Publication Date
Dec 21, 2015
Submission Date
Mar 04, 2014
Identifiers
arXiv ID: 1403.0824
Source
arXiv
License
Yellow
External links

Abstract

A theorem of J. Bochi and N. Gourmelon states that an invertible linear cocycle admits a dominated splitting if and only if the singular values of its iterates become separated at a uniform exponential rate. It is not difficult to show that for cocycles of non-invertible linear maps over an invertible dynamical system -- which we refer to as semi-invertible cocycles -- this criterion fails to imply the existence of a dominated splitting. In this article we show that a simple modification of Bochi and Gourmelon's singular value criterion is equivalent to the existence of a dominated splitting in both the invertible and the semi-invertible cases. This result extends to the more general context of semi-invertible cocycles of bounded linear operators acting on a Hilbert space, and generalises previous results due to J.-C. Yoccoz, J. Bochi and N. Gourmelon, and the present author.

Report this publication

Statistics

Seen <100 times