Expression of type Conditional

from the theory of proveit.numbers.addition

import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import Conditional, i, j
from proveit.core_expr_types import a_1_to_i, b_1_to_j
from proveit.logic import And, Equals, Forall, InSet
from proveit.numbers import Add, Complex, Natural, zero

# build up the expression from sub-expressions
expr = Conditional(Forall(instance_param_or_params = [a_1_to_i, b_1_to_j], instance_expr = Equals(Add(a_1_to_i, zero, b_1_to_j), Add(a_1_to_i, b_1_to_j)), domain = Complex), And(InSet(i, Natural), InSet(j, Natural)))

expr:

# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")

Passed sanity check: expr matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\left\{\forall_{a_{1}, a_{2}, \ldots, a_{i}, b_{1}, b_{2}, \ldots, b_{j} \in \mathbb{C}}~\left(\left(a_{1} +  a_{2} +  \ldots +  a_{i} + 0+ b_{1} +  b_{2} +  \ldots +  b_{j}\right) = \left(a_{1} +  a_{2} +  \ldots +  a_{i}+ b_{1} +  b_{2} +  \ldots +  b_{j}\right)\right) \textrm{ if } i \in \mathbb{N} ,  j \in \mathbb{N}\right..

stored_expr.style_options()

name	description	default	current value	related methods
condition_delimiter	'comma' or 'and'	comma	comma	('with_comma_delimiter', 'with_conjunction_delimiter')

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Conditional	value: 1 condition: 2
1	Operation	operator: 3 operand: 6
2	Operation	operator: 17 operands: 5
3	Literal
4	ExprTuple	6
5	ExprTuple	7, 8
6	Lambda	parameters: 25 body: 9
7	Operation	operator: 39 operands: 10
8	Operation	operator: 39 operands: 11
9	Conditional	value: 12 condition: 13
10	ExprTuple	34, 14
11	ExprTuple	37, 14
12	Operation	operator: 15 operands: 16
13	Operation	operator: 17 operands: 18
14	Literal
15	Literal
16	ExprTuple	19, 20
17	Literal
18	ExprTuple	21, 22
19	Operation	operator: 24 operands: 23
20	Operation	operator: 24 operands: 25
21	ExprRange	lambda_map: 26 start_index: 36 end_index: 34
22	ExprRange	lambda_map: 27 start_index: 36 end_index: 37
23	ExprTuple	29, 28, 30
24	Literal
25	ExprTuple	29, 30
26	Lambda	parameter: 47 body: 31
27	Lambda	parameter: 47 body: 32
28	Literal
29	ExprRange	lambda_map: 33 start_index: 36 end_index: 34
30	ExprRange	lambda_map: 35 start_index: 36 end_index: 37
31	Operation	operator: 39 operands: 38
32	Operation	operator: 39 operands: 40
33	Lambda	parameter: 47 body: 41
34	Variable
35	Lambda	parameter: 47 body: 42
36	Literal
37	Variable
38	ExprTuple	41, 43
39	Literal
40	ExprTuple	42, 43
41	IndexedVar	variable: 44 index: 47
42	IndexedVar	variable: 45 index: 47
43	Literal
44	Variable
45	Variable
46	ExprTuple	47
47	Variable