!!Democritean Universe
Term coined by [http://www.wvquine.org/ "WVO Quine"] in essay "Propositional Objects" in "Ontological Relativity and Other Essays" 1969.
A Democritean Universe is just a 3-dimensional collection of "atoms" in "space" - a philosphical tool for simplifying thought.
By defining f{x,y,z,t} = 0 or 1, representing an empty "slot" or an "atom" for all points x,y,z and for all times t you completely describe a given Democritean Universe.
[http://en.wikipedia.org/wiki/Conway's_Game_of_Life Conway's Game of Life] uses a 2-dimensional simplification of a Democritean Universe.