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An analytic quasi-periodic cocycle is a linear cocycle over a fixed ergodic torus translation of one or several variables, where the fiber action depends analytically on the base point. Consider the space of all such cocycles of any given…

Dynamical Systems · Mathematics 2017-03-17 Pedro Duarte , Silvius Klein

We devise an abstract, modular scheme to prove continuity of the Lyapunov exponents for a general class of linear cocycles. The main assumption is the availability of appropriate large deviation type (LDT) estimates which are uniform in the…

Dynamical Systems · Mathematics 2015-07-13 Pedro Duarte , Silvius Klein

In this paper we prove the continuity of all Lyapunov exponents, as well as the continuity of the Oseledets decomposition, for a class of irreducible cocycles over strongly mixing Markov shifts. Moreover, gaps in the Lyapunov spectrum lead…

Dynamical Systems · Mathematics 2015-07-13 Silvius Klein , Pedro Duarte

We consider an abstract space of measurable linear cocycles and we assume the availability in this space of some appropriate uniform large deviation type estimates. Under these hypotheses we establish the continuity of the Oseledets…

Dynamical Systems · Mathematics 2015-07-13 Pedro Duarte , Silvius Klein

We prove the H\"older continuity of Lyapunov exponents for general linear cocycles when the base measures vary in Wasserstein distance, under the assumption of uniform large deviations type (LDT) estimates. This is a measure version of the…

Dynamical Systems · Mathematics 2025-06-10 Ao Cai , Xiaojuan Deng

We show that on a dense open set of analytic one-frequency complex valued cocycles in arbitrary dimension Oseledets filtration is either dominated or trivial. The underlying mechanism is different from that of the Bochi-Viana Theorem for…

Dynamical Systems · Mathematics 2017-03-23 Artur Avila , Svetlana Jitomirskaya , Christian Sadel

We develop a higher-dimensional extension of multifractal analysis for typical fiber-bunched linear cocycles. Our main result is a relative variational principle, which shows that the topological entropy of Lyapunov exponent level sets can…

Dynamical Systems · Mathematics 2025-12-17 Reza Mohammadpour , Paulo Varandas

Oseledets' celebrated Multiplicative Ergodic Theorem (MET) is concerned with the exponential growth rates of vectors under the action of a linear cocycle on R^d. When the linear actions are invertible, the MET guarantees an…

Dynamical Systems · Mathematics 2010-02-01 Gary Froyland , Simon Lloyd , Anthony Quas

It follows from Oseledec Multiplicative Ergodic Theorem that the Lyapunov-irregular set of points for which the Oseledec averages of a given continuous cocycle diverge has zero measure with respect to any invariant probability measure. In…

Dynamical Systems · Mathematics 2017-02-15 Xueting Tian

In this note we use an approximation scheme to establish large deviations for quasi-periodic Gevrey cocycles. As an application, we obtain continuity in the cocycle for the Lyapunov exponent.

Dynamical Systems · Mathematics 2025-09-29 Matthew Powell

The paper is devoted to the properties of a complex matrix ``twisted,'' otherwise called ``spectral,'' cocycle, associated with substitution dynamical systems. Following a recent finding of Rajabzadeh and Safaee [arXiv:2501.16824] of an…

Dynamical Systems · Mathematics 2025-08-21 Boris Solomyak

We consider one-dimensional quasi-periodic Schr\"odinger operators with analytic potentials. In the positive Lyapunov exponent regime, we prove large deviation estimates which lead to optimal H\"older continuity of the Lyapunov exponents…

Mathematical Physics · Physics 2020-07-17 Rui Han , Shiwen Zhang

We show that typical (in the sense of Bonatti-Viana) H\"{o}lder and fiber-bunched $GL_d(\mathbb{R})$-valued cocycles over a subshift of finite type are uniformly quasi-multiplicative with respect to all singular value potentials. We prove…

Dynamical Systems · Mathematics 2020-03-18 Kiho Park

We prove that the Lyapunov exponents of typical fiber bunched linear cocycles over Lorenz-like flows have multiplicity one: the set of exceptional cocycles has infinite codimention, i.e. it is locally contained in finite unions of closed…

Dynamical Systems · Mathematics 2012-08-29 Mohammad Fanaee

We present an analysis of one-dimensional models of dynamical systems that possess 'coherent structures'; global structures that disperse more slowly than local trajectory separation. We study cocycles generated by expanding interval maps…

Dynamical Systems · Mathematics 2011-02-16 Gary Froyland , Simon Lloyd , Anthony Quas

We establish (i) stability of Lyapunov exponents and (ii) convergence in probability of Oseledets spaces for semi-invertible matrix cocycles, subjected to small random perturbations. The first part extends results of Ledrappier and Young to…

Dynamical Systems · Mathematics 2013-10-10 Gary Froyland , Cecilia González-Tokman , Anthony Quas

We establish some conditions under which $\text{GL}(d,\mathbb{R})$-valued cocycles over a subshift of finite type, equipped with an equilibrium state, exhibit exponential asymptotics for the spectral radius. Specifically, we show that the…

Dynamical Systems · Mathematics 2026-03-26 Nicolas Martinez Ramos

We derive a criterion for the positivity of the maximal Lyapunov exponent of generic mixed random-quasiperiodic linear cocycles, a model introduced in a previous work. This result is applicable to cocycles corresponding to Schr\"odinger…

Dynamical Systems · Mathematics 2023-06-28 Ao Cai , Pedro Duarte , Silvius Klein

We consider Holder continuous linear cocycles over partially hyperbolic diffeomorphisms. For fiber bunched cocycles with one Lyapunov exponent we show continuity of measurable invariant conformal structures and sub-bundles. Further, we…

Dynamical Systems · Mathematics 2012-09-11 Boris Kalinin , Victoria Sadovskaya

The celebrated Oseledets theorem \cite{O}, building over seminal works of Furstenberg and Kesten on random products of matrices and random variables taking values on non-compact semisimple Lie groups \cite{FK,Furstenberg}, ensures that the…

Dynamical Systems · Mathematics 2021-07-01 Giovane Ferreira , Paulo Varandas
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