proposition: Lemma tuto_minsetinf : forall P A B, minset P A -> P B -> B \subset A -> B = A.
proof: Proof. by move=> P A B; case/minsetP=> _; exact. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finset)