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2006 Modeling Snow Crystal Growth I: Rigorous Results for Packard's Digital Snowflakes
Janko Gravner, David Griffeath
Experiment. Math. 15(4): 421-444 (2006).


Digital snowflakes are solidifying cellular automata on the triangular lattice with the property that a site having exactly one occupied neighbor always becomes occupied at the next time step. We demonstrate that each such rule fills the lattice with an asymptotic density that is independent of the initial finite set. There are some cases in which this density can be computed exactly, and others in which it can only be approximated. We also characterize when the final occupied set comes within a uniformly bounded distance of every lattice point. Other issues addressed include macroscopic dynamics and exact solvability.


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Janko Gravner. David Griffeath. "Modeling Snow Crystal Growth I: Rigorous Results for Packard's Digital Snowflakes." Experiment. Math. 15 (4) 421 - 444, 2006.


Published: 2006
First available in Project Euclid: 5 April 2007

zbMATH: 1122.37057
MathSciNet: MR2293594

Primary: 37B15
Secondary: 11B05 , 60K05 , 68Q80

Keywords: Asymptotic density , cellular automaton , exact solvability , Growth model , macroscopic dynamics , thickness

Rights: Copyright © 2006 A K Peters, Ltd.

Vol.15 • No. 4 • 2006
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