Omega and the time evolution of the N-body problem
arXiv:physics/0703031
Abstract
The series solution of the behavior of a finite number of physical bodies and Chaitin's Omega number share quasi-algorithmic expressions; yet both lack a computable radius of convergence.
Contribution to the collection of papers "Randomness and Complexity, from Leibniz to Chaitin," ed. by Cristian S. Calude