proposition: Lemma add_vlabel2_iso'' F G (h: F ≃2 G) x x' (ex: h x = x') a b (e: a ≡ b): F [tst x <- a] ≃2 G [tst x' <- b].
proof: Proof. Iso2 (add_vlabel_iso'' ex e); apply h. Defined.
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom mgraph ptt)