diff --git a/theories/base.v b/theories/base.v index a94511d4ee56c63cb11a0a57bacb8eaa5c7b8523..36af265f23b0aa8104346cc983c5faa727619ec8 100644 --- a/theories/base.v +++ b/theories/base.v @@ -129,7 +129,7 @@ Arguments decide _ {_}. (** ** Inhabited types *) (** This type class collects types that are inhabited. *) -Class Inhabited (A : Type) : Prop := populate { _ : A }. +Class Inhabited (A : Type) : Type := populate { inhabitant : A }. Arguments populate {_} _. Instance unit_inhabited: Inhabited unit := populate (). diff --git a/theories/finite.v b/theories/finite.v index 7824001163d1cb787b7641ee2cf5dcb50ebd298b..fed9dd3f795fd9e68de56e561956edf16c007731 100644 --- a/theories/finite.v +++ b/theories/finite.v @@ -69,7 +69,7 @@ Proof. Qed. Lemma finite_inhabited A `{finA: Finite A} : 0 < card A → Inhabited A. Proof. - unfold card. destruct finA as [[|x ?] ??]; simpl; auto with lia. + unfold card; intros. destruct finA as [[|x ?] ??]; simpl in *; [exfalso;lia|]. constructor; exact x. Qed. Lemma finite_injective_contains `{finA: Finite A} `{finB: Finite B} (f: A → B)