... version of CFG, by considering that a configuration can be transformed into another one by transferring chips from one vertex along one of its outgoing edges. However, the firing of a chip along ... all configurations reachable from the initial one is called configuration space, and a fixed point is a configuration from which the evolution rule can not be applied. Convergence conditions (involving ... configuration, we call configuration space, and we denote by CCFG(G,O), the set of all configurations reachable from the initial configuration O. On this set, we define the following relation: a ≥...