fact: Definition remove_edges := {| vertex := G; edge := {e : edge G | e \notin E}; endpoint b e := endpoint b (val e); vlabel x := vlabel x; elabel e := elabel (val e); |}.
imports: Coq(Morphisms RelationClasses) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij) GraphTheory(equiv digraph setoid_bigop structures)