fact: Definition toParamSym : Param04.Rel@{i} A B := @Param04.BuildRel A B (sym_rel (graph g)) (@Map0.BuildHas@{i} _ _ _) (@Map4.BuildHas@{i} _ _ _ g (fun _ _ => id) (fun _ _ => id) (fun _ _ _ => 1%path)).
imports: ssreflect