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- W2068928878 abstract "Abstract We investigate chip-firing with respect to open covers of discrete graphs and metric graphs. For the case of metric graphs we show that given an open cover and a sink q , stabilization of a divisor D is unique and that there is a distinguished configuration equivalent to D , which we call the critical configuration. Also, we show that given a double cover of the metric graph by stars, which is the continuous analogue of the sandpile model, the critical configurations are in bijection with reduced divisors. Passing to the discrete case, we interpret open covers of a graph as simplicial complexes on the vertex and observe that chip-firing with respect to a simplicial complex is equivalent to the model introduced by Paoletti [G. Paoletti. July 11 2007: Master in Physics at University of Milan, defending thesis “Abelian sandpile models and sampling of trees and forests”; supervisor: Prof. S. Caracciolo. http://pcteserver.mi.infn.it/caraccio/index.html ]. We generalize this setup for directed graphs using weighted simplicial complexes on the vertex set and show that the fundamental results extend. In the undirected case we present a generalization of the Cori-Le Borgne algorithm for chip-firing models via open covers, giving an explicit bijection between the critical configurations and the spanning trees of a graph. ( http://www.elsevier.com/locate/endm )" @default.
- W2068928878 created "2016-06-24" @default.
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- W2068928878 date "2013-09-01" @default.
- W2068928878 modified "2023-09-27" @default.
- W2068928878 title "Chip-firing via open covers" @default.
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- W2068928878 doi "https://doi.org/10.1016/j.endm.2013.07.056" @default.
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