by alpha0

Somewhere in road to reality, Penrose comments on various models of universe and briefly considers the "discreet" time-space. His view was that it is conceptually sound but "can't be right because of the computational demands". (Will need to dig up the actual quote; that's a recall of a reading from a few years ago.)

Personally I have always found the notion of a discreet -- cellular -- universe quite compelling. Planck units certainly strongly suggest it (don't they?) This would have some interesting consequences. (For example, the space of possible forms would be constrained and defined by group theoretic constructs).

A treasure trove can be found here: http://empslocal.ex.ac.uk/people/staff/mrwatkin/zeta/physics...