Show the Proof

import proveit
# Automation is not needed when only showing a stored proof:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%show_proof

	step type	requirements	statement
0	instantiation	1, 2, 3	⊢
	: , : , :
1	reference	24	⊢
2	theorem		⊢
	proveit.numbers.number_sets.integers.neg_int_within_nonpos_int
3	instantiation	4, 5, 6	⊢
	:
4	theorem		⊢
	proveit.numbers.number_sets.integers.neg_int_is_int_neg
5	instantiation	24, 7, 15	⊢
	: , : , :
6	instantiation	8, 9, 10	⊢
	: , : , :
7	instantiation	11, 13, 14	⊢
	: , :
8	theorem		⊢
	proveit.numbers.ordering.transitivity_less_eq_less
9	instantiation	12, 13, 14, 15	⊢
	: , : , :
10	instantiation	16, 17	⊢
	:
11	theorem		⊢
	proveit.numbers.number_sets.integers.int_interval_within_int
12	theorem		⊢
	proveit.numbers.number_sets.integers.interval_upper_bound
13	instantiation	18, 19	⊢
	:
14	instantiation	24, 20, 21	⊢
	: , : , :
15	assumption		⊢
16	theorem		⊢
	proveit.numbers.number_sets.integers.negative_if_in_neg_int
17	instantiation	22, 23	⊢
	:
18	theorem		⊢
	proveit.numbers.negation.int_closure
19	instantiation	24, 25, 26	⊢
	: , : , :
20	theorem		⊢
	proveit.numbers.number_sets.integers.nonpos_int_within_int
21	instantiation	27, 28	⊢
	:
22	theorem		⊢
	proveit.numbers.negation.int_neg_closure
23	theorem		⊢
	proveit.numbers.numerals.decimals.posnat3
24	theorem		⊢
	proveit.logic.sets.inclusion.superset_membership_from_proper_subset
25	theorem		⊢
	proveit.numbers.number_sets.integers.nat_within_int
26	theorem		⊢
	proveit.numbers.numerals.decimals.nat4
27	theorem		⊢
	proveit.numbers.negation.int_nonpos_closure
28	theorem		⊢
	proveit.numbers.numerals.decimals.nat3