fact: Definition g2_par (F G: graph2) := point (merge_seq (F ⊎ G) [::(unl input,unr input); (unl output,unr output)]) (\pi (unl input)) (\pi (unr output)).
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom mgraph ptt)