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, 4, 5*	,  ⊢
	: , :
1	theorem		⊢
	proveit.numbers.number_sets.integers.interval_cardinality
2	theorem		⊢
	proveit.numbers.number_sets.integers.zero_is_int
3	reference	20	⊢
4	assumption		⊢
5	instantiation	6, 7, 8	⊢
	: , : , :
6	axiom		⊢
	proveit.logic.equality.equals_transitivity
7	instantiation	9, 10	⊢
	: , : , :
8	instantiation	11, 27, 12, 13	⊢
	: , : , : , :
9	axiom		⊢
	proveit.logic.equality.substitution
10	theorem		⊢
	proveit.numbers.negation.negated_zero
11	theorem		⊢
	proveit.numbers.addition.elim_zero_any
12	instantiation	25, 15, 14	⊢
	: , : , :
13	instantiation	25, 15, 16	⊢
	: , : , :
14	instantiation	25, 18, 17	⊢
	: , : , :
15	theorem		⊢
	proveit.numbers.number_sets.complex_numbers.real_within_complex
16	instantiation	25, 18, 19	⊢
	: , : , :
17	instantiation	25, 21, 20	⊢
	: , : , :
18	theorem		⊢
	proveit.numbers.number_sets.real_numbers.rational_within_real
19	instantiation	25, 21, 22	⊢
	: , : , :
20	instantiation	25, 23, 24	⊢
	: , : , :
21	theorem		⊢
	proveit.numbers.number_sets.rational_numbers.int_within_rational
22	instantiation	25, 26, 27	⊢
	: , : , :
23	theorem		⊢
	proveit.numbers.number_sets.integers.nat_pos_within_int
24	assumption		⊢
25	theorem		⊢
	proveit.logic.sets.inclusion.superset_membership_from_proper_subset
26	theorem		⊢
	proveit.numbers.number_sets.integers.nat_within_int
27	theorem		⊢
	proveit.numbers.numerals.decimals.nat1
*equality replacement requirements