proposition: Lemma omorphI (f : {mlmorphism T -> T'}) : {morph f : x y / x `&` y}.
proof: Proof. exact: omorphI_subproof. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)