fact: Definition merge_add_vlabelL (G H: graph2) x a l i o : point (merge_seq (G[tst x <- a] ⊎ H) l) (\pi i) (\pi o) ≃2 point (merge_seq (G ⊎ H) l) (\pi i) (\pi o) [tst \pi inl x <- a].
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom mgraph mgraph2 rewriting)