proposition: Lemma merge_same'E (x: F): merge_same' (\pi x) = \pi x.
proof: Proof. apply quot_sameE. Qed.
imports: Coq(Morphisms RelationClasses) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij) GraphTheory(equiv digraph setoid_bigop structures)