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第1行： − {{short description|Cellular automaton}}+
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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。
[[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.]]