2 papers
patt-sol1993
Threshold-Range Scaling of Excitable Cellular Automata
Robert Fisch, Janko Gravner, David Griffeath
Each cell of a two-dimensional lattice is painted one of k colors, arranged in a "color wheel." The colors advance (0 to k-1 mod k) either automatically or by contact with at least…
patt-sol1993
Metastability in the Greenberg-Hastings Model
Robert Fisch, Janko Gravner, David Griffeath
The Greenberg-Hastings Model (GHM) is a family of multitype cellular automata that emulate excitable media, exhibiting the nucleation and spiral formation characteristic of such co…