71 10 14 v 1 5 N ov 1 99 7 Chaotic exit to inflation : the dynamics of pre-inflationary universes


We show that anisotropic Bianchi type-IX models, with matter and cosmological constant have chaotic dynamics, connected to the presence of a saddle-center in phase space. The topology of cylinders emanating from unstable periodic orbits about the saddle-center provides an invariant characterization of chaos in the models. The model can be thought to… (More)


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