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Unstable periodic orbits of perturbed Lorenz equations

Abstract

The extended Malkus-Robbins dynamo [Moroz, 2003] reduces to the Lorenz equations when one of the key parameters, β\beta, vanishes. In a recent study [Moroz, 2004] investigated what happened to the lowest order unstable periodic orbits of the Lorenz limit as β\beta was increased to the end of the chaotic regime, using the classic Lorenz parameter values of r = 28; σ\sigma = 10 and b = 8=3. In this paper we return to the parameter choices of [Moroz, 2003], reporting on two of the cases discussed therein

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