fact: Definition toParamSym@{} : Param44.Rel@{i} B A := @Param44.BuildRel B A (sym_rel (graph f)) (@Map4.BuildHas@{i} _ _ _ _ comap_in_map map_in_comap map_in_comapK) (@Map4.BuildHas@{i} _ _ _ _ (fun _ _ => id) (fun _ _ => id) (fun _ _ _ => 1%path)).
imports: ssreflect