importproveittheory=proveit.Theory()# the theorem's theory
In [2]:
%proving difference_is_nat_pos
With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of difference_is_nat_pos: (see dependencies)
difference_is_nat_pos may now be readily provable (assuming required theorems are usable). Simply execute "%qed".