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math.CO2014
Sandpiles, spanning trees, and plane duality
Melody Chan, Darren Glass, Matthew Macauley +3
Let G be a connected, loopless multigraph. The sandpile group of G is a finite abelian group associated to G whose order is equal to the number of spanning trees in G. Holroyd et a…
math.CO2014
Sandpiles and Dominos
Laura Florescu, Daniela Morar, David Perkinson +2
We consider the subgroup of the abelian sandpile group of the grid graph consisting of configurations of sand that are symmetric with respect to central vertical and horizontal axe…