Zeng Lian, Mikko Stenlund
Positive Lyapunov exponent by a random perturbation
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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 bound, for a large and controlled set of parameter values.