Abstract:
We consider the question of the criticality of the Abelian sandpile model on converging sequences of graphs. Classically, one studies the model on a sequence of finite graphs exhausting some infinite regular lattice. The dynamics of the model is encoded by so-called avalanches and its criticality is reflected, asymptotically, by power-law decays of various statistics related to these avalanches. After considering few examples, we extend the study of the criticality of the ASM to graphs converging in a more general sense to some infinite limits.