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删除40字节 、 2020年11月15日 (日) 17:17
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此词条暂由水流心不竞初译,未经审校,带来阅读不便,请见谅。此词条由Zcy初步审校。
 
此词条暂由水流心不竞初译,未经审校,带来阅读不便,请见谅。此词条由Zcy初步审校。
{{short description|Cellular automaton}}
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[[File:Sandpile identity 300x205.png|upright=1.25|thumb|The identity element of the sandpile group of a rectangular grid. Yellow pixels correspond to vertices carrying three particles, lilac to two particles, green to one, and black to zero.]]
 
[[File:Sandpile identity 300x205.png|upright=1.25|thumb|The identity element of the sandpile group of a rectangular grid. Yellow pixels correspond to vertices carrying three particles, lilac to two particles, green to one, and black to zero.]]