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Wikipedia has a picture/animation of the Identity for rectangular and square grids https://en.wikipedia.org/wiki/Abelian_sandpile_model https://en.wikipedia.or
by lupire 10mo ago
Wikipedia has a picture/animation of the Identity for rectangular and square grids
https://en.wikipedia.org/wiki/Abelian_sandpile_model https://en.wikipedia.org/wiki/Abelian_sandpile_model