10 citations · 43 across the 21 of their papers we have counts for
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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…
math.CO2010
A Note on the Critical Group of a Line Graph
David Perkinson, Nicholas Salter, Tianyuan Xu
This note answers a question posed by Levine in arkiv:math.CO/0906.2809. The main result is Theorem 1 which shows that under certain circumstances a critical group of a directed gr…