The Kimtein equaaons are shown to exhibit tormal chaotic behaviour that can be characterized by invariants of nonlinear dynamics. An overview of new concept in dynamical systems theory is provided. The Mixmaster universe is studied as a dynamical system in an appropriate phase space, a Poincare retur. mapping is constructed for the system and a smooth invariant measure is calculated. Several dynamical invariants can then he calculated for the Mixmastcr model, including its metric entropy. Various results in the metric theory of numbers are employed to calculate other aspects of the chaotic behaviour. Perturbations of the Mixmaster return mapping and the rate of approach to the equiKbrium measure are also considered The Mixmaster model is shown to be a Bernoulli system and the Hamiltonian formulation of Misner used to display the connection tvsween olutions to Einstein's equations and geodesic flows in hyperbolic Riemannian space. We describe the source of chaotic behaviour in the Mumaster model, the classification of homogeneous solutions to the Einstein equations by reference to the presence of chaos, gravitational turbulence, universal behaviour in Einstein's equations and a possible description of Penrose's gravitational entropy.

Authors: Barrow J.  Pages: 49 Year: 1981 
Tags: general chaotic behavior relativity   Customers who bought this item also bought: 