Aperiodicity: Lessons from Various Generalizations

C. Radin
Thu, Aug 1, 2002
University of Victoria, Victoria, Canada
Aperiodic Order, Dynamical Systems, Operator Algebras and Topology
This is a slightly expanded version of a talk given at the Workshop on Aperiodic Order, held in Victoria, B.C. in August, 2002. The general subject of the talk was the densest packings of simple bodies, for instance spheres or polyhedra, in Euclidean or hyperbolic spaces, and describes recent joint work with Lewis Bowen. One of the main points was to report on our solution of the old problem of treating optimally dense packings of bodies in hyperbolic spaces. The other was to describe the general connection between aperiodicity and nonuniqueness in problems of optimal density.