Comment Hierarchy as dimension (Score -1) 465
Grigori Perelman:
Here, the parameter is not time, but scale â" and our space is modeled not by a manifold with a metric, but by a hierarchy of manifolds and metrics connected by the Ricci flow equation.
This mathematics belongs to the new century and the new millennium, but the notion of a hierarchy of metrics would have pleased Riemann. Note that we have a paradox here: the regions that appear to be far from each other at a large distance scale may become close at a smaller distance scale; moreover if we allow Ricci flow through singularities, the regions that are in different connected components at a larger distance scale may become neighboring...