Proof of proveit.numbers.exponentiation.add_one_left_in_exp_poss_zero_base theorem

import proveit
theory = proveit.Theory() # the theorem's theory

%proving add_one_left_in_exp_poss_zero_base

With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of
add_one_left_in_exp_poss_zero_base:
(see dependencies)

add_one_left_in_exp_poss_zero_base may now be readily provable (assuming required theorems are usable).  Simply execute "%qed".