proposition: Fact upRen_poly_type_poly_type_id {t}: upRen_poly_type_poly_type id t = t.
proof: Proof. by case: t. Qed.
imports: List Lia Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Autosubst.unscoped Undecidability.SystemF.Util.Facts ssreflect ssrbool ssrfun