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	theorem		⊢
	proveit.core_expr_types.tuples.partition_front
2	instantiation	4, 5, 6	⊢
	:
3	instantiation	7, 8	⊢
	:
4	theorem		⊢
	proveit.numbers.number_sets.integers.nonneg_int_is_natural
5	instantiation	9, 10, 11	⊢
	: , :
6	instantiation	12, 13	⊢
	: , :
7	theorem		⊢
	proveit.numbers.addition.elim_zero_left
8	instantiation	29, 14, 15	⊢
	: , : , :
9	theorem		⊢
	proveit.numbers.addition.add_int_closure_bin
10	instantiation	29, 30, 20	⊢
	: , : , :
11	instantiation	16, 17, 18	⊢
	: , : , :
12	theorem		⊢
	proveit.numbers.addition.subtraction.nonneg_difference
13	instantiation	19, 20	⊢
	:
14	theorem		⊢
	proveit.numbers.number_sets.complex_numbers.real_within_complex
15	instantiation	29, 21, 22	⊢
	: , : , :
16	theorem		⊢
	proveit.logic.sets.inclusion.unfold_subset_eq
17	instantiation	23, 24	⊢
	: , :
18	instantiation	25, 26	⊢
	: , :
19	theorem		⊢
	proveit.numbers.number_sets.natural_numbers.natural_lower_bound
20	theorem		⊢
	proveit.numbers.numerals.decimals.nat2
21	theorem		⊢
	proveit.numbers.number_sets.real_numbers.rational_within_real
22	instantiation	29, 27, 28	⊢
	: , : , :
23	theorem		⊢
	proveit.logic.sets.inclusion.relax_proper_subset
24	theorem		⊢
	proveit.numbers.number_sets.integers.zero_set_within_int
25	theorem		⊢
	proveit.logic.sets.enumeration.fold_singleton
26	theorem		⊢
	proveit.numbers.negation.negated_zero
27	theorem		⊢
	proveit.numbers.number_sets.rational_numbers.int_within_rational
28	instantiation	29, 30, 31	⊢
	: , : , :
29	theorem		⊢
	proveit.logic.sets.inclusion.superset_membership_from_proper_subset
30	theorem		⊢
	proveit.numbers.number_sets.integers.nat_within_int
31	theorem		⊢
	proveit.numbers.numerals.decimals.nat1