fact: Definition add_vertex (G : pre_graph) (x : VT) a := {| vset := x |` vset G ; eset := eset G; endpt := endpt G; lv := (lv G)[upd x := a]; le := le G; p_in := p_in G; p_out := p_out G |}.
imports: HB(structures) Coq(Relation_Definitions Morphisms RelationClasses) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom rewriting) GraphTheory(finmap_plus)