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Positive Lyapunov exponents for symplectic cocycles

by Mario Bessa, Paulo Varandas , 2014
"... In the present paper we give a positive answer to a question posed by Viana in [22] on the existence of positive Lyapunov exponents for symplectic cocycles. Actually, we prove that for an open and dense set of Hölder symplectic cocycles over a non-uniformly hyperbolic diffeomorphism there are non- ..."
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In the present paper we give a positive answer to a question posed by Viana in [22] on the existence of positive Lyapunov exponents for symplectic cocycles. Actually, we prove that for an open and dense set of Hölder symplectic cocycles over a non-uniformly hyperbolic diffeomorphism there are non

Positive Lyapunov exponents for Hamiltonian linear differential systems

by Paulo Varandas , 2014
"... Abstract. In the present paper we give a positive answer to some questions posed in [39] on the existence of positive Lyapunov exponents for symplectic and Hamiltonian cocycles. Actually, we prove that for an open and dense set of Hölder symplectic cocycles over a non-uniformly hyperbolic diffeomor ..."
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Abstract. In the present paper we give a positive answer to some questions posed in [39] on the existence of positive Lyapunov exponents for symplectic and Hamiltonian cocycles. Actually, we prove that for an open and dense set of Hölder symplectic cocycles over a non-uniformly hyperbolic

POSITIVE LYAPUNOV EXPONENT BY A RANDOM PERTURBATION

by Zeng Lian, Mikko Stenlund
"... Abstract. We study the effect of a random perturbation on a one-parameter family of dynamical systems whose behavior in the absence of perturbation is ill understood. We provide conditions under which the perturbed system is ergodic and admits a positive Lyapunov exponent, with an explicit lower bou ..."
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Abstract. We study the effect of a random perturbation on a one-parameter family of dynamical systems whose behavior in the absence of perturbation is ill understood. We provide conditions under which the perturbed system is ergodic and admits a positive Lyapunov exponent, with an explicit lower

POSITIVE LYAPUNOV EXPONENTS FOR QUASIPERIODIC Szegö Cocycles

by Zhenghe Zhang , 2012
"... ..."
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Printed in Great Britain Positive Lyapunov exponents for a

by unknown authors , 1990
"... Abstract Let T be an aperiodic automorphism of a standard probability space (X, m) We prove, that the set hm n-'log||>i(r' n-*oo I- 1 x) A(Tx)A(x)\\>0,, is dense in L°°(X, SL(2, R)) ..."
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Abstract Let T be an aperiodic automorphism of a standard probability space (X, m) We prove, that the set hm n-'log||>i(r' n-*oo I- 1 x) A(Tx)A(x)\\>0,, is dense in L°°(X, SL(2, R))

HYPERBOLICITY ESTIMATES FOR RANDOM MAPS WITH POSITIVE LYAPUNOV EXPONENTS

by Yongluo Cao, Stefano Luzzatto, Isabel Rios , 2006
"... In this paper we consider smooth random dynamical systems F over an abstract dynamical systems (Ω, F, P, θ), where (Ω, F, P) is a complete probability space and θ: Ω → Ω is a P preserving ergodic invertible transformation. More specifically, we have a skew-product ..."
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In this paper we consider smooth random dynamical systems F over an abstract dynamical systems (Ω, F, P, θ), where (Ω, F, P) is a complete probability space and θ: Ω → Ω is a P preserving ergodic invertible transformation. More specifically, we have a skew-product

UNIFORM HYPERBOLICITY FOR RANDOM MAPS WITH POSITIVE LYAPUNOV EXPONENTS

by Yongluo Cao, Stefano Luzzatto, Isabel Rios , 2007
"... Abstract. We consider some general classes of random dynamical systems and show that a priori very weak nonuniform hyperbolicity conditions actually imply uniform hyperbolicity. ..."
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Abstract. We consider some general classes of random dynamical systems and show that a priori very weak nonuniform hyperbolicity conditions actually imply uniform hyperbolicity.

DENSITY OF POSITIVE LYAPUNOV EXPONENTS FOR SL(2,R)

by Artur Avila
"... ar ..."
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Measures with positive Lyapunov exponent and conformal measures in rational dynamics

by Neil Dobbs
"... Abstract. Ergodic properties of rational maps are studied, generalising the work of F. Ledrappier. A new construction allows for simpler proofs of stronger results. Very general conformal measures are considered. Equivalent conditions are given for an ergodic invariant probability measure with posit ..."
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with positive Lyapunov exponent to be absolutely continuous with respect to a general conformal measure. If they hold, we can construct an induced expanding Markov map with integrable return time which generates the invariant measure. 1.

characterization of transition to chaos with multiple positive Lyapunov exponents by unstable periodic orbits

by Physics Letters A, Ruslan L. Davidchack, Ying-Cheng Lai , 2000
"... We investigate how the transition to chaos with multiple positive Lyapunov exponents can be characterized by the set of infinite number of unstable periodic orbits embedded in the chaotic invariant set. We argue and provide numerical confirmation that the transition is generally accompanied by a non ..."
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We investigate how the transition to chaos with multiple positive Lyapunov exponents can be characterized by the set of infinite number of unstable periodic orbits embedded in the chaotic invariant set. We argue and provide numerical confirmation that the transition is generally accompanied by a
Results 1 - 10 of 3,807