Expression of type ExprTuple

from the theory of proveit.numbers.multiplication

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, ExprTuple, Lambda, 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 Complex, Mult, Natural, one

# build up the expression from sub-expressions
expr = ExprTuple(Lambda([i, j], Conditional(Forall(instance_param_or_params = [a_1_to_i, b_1_to_j], instance_expr = Equals(Mult(a_1_to_i, one, b_1_to_j), Mult(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(\left(i, j\right) \mapsto \left\{\forall_{a_{1}, a_{2}, \ldots, a_{i}, b_{1}, b_{2}, \ldots, b_{j} \in \mathbb{C}}~\left(\left(a_{1} \cdot  a_{2} \cdot  \ldots \cdot  a_{i} \cdot 1\cdot b_{1} \cdot  b_{2} \cdot  \ldots \cdot  b_{j}\right) = \left(a_{1} \cdot  a_{2} \cdot  \ldots \cdot  a_{i}\cdot b_{1} \cdot  b_{2} \cdot  \ldots \cdot  b_{j}\right)\right) \textrm{ if } i \in \mathbb{N} ,  j \in \mathbb{N}\right..\right)

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1
1	Lambda	parameters: 2 body: 3
2	ExprTuple	36, 39
3	Conditional	value: 4 condition: 5
4	Operation	operator: 6 operand: 9
5	Operation	operator: 20 operands: 8
6	Literal
7	ExprTuple	9
8	ExprTuple	10, 11
9	Lambda	parameters: 28 body: 12
10	Operation	operator: 41 operands: 13
11	Operation	operator: 41 operands: 14
12	Conditional	value: 15 condition: 16
13	ExprTuple	36, 17
14	ExprTuple	39, 17
15	Operation	operator: 18 operands: 19
16	Operation	operator: 20 operands: 21
17	Literal
18	Literal
19	ExprTuple	22, 23
20	Literal
21	ExprTuple	24, 25
22	Operation	operator: 27 operands: 26
23	Operation	operator: 27 operands: 28
24	ExprRange	lambda_map: 29 start_index: 38 end_index: 36
25	ExprRange	lambda_map: 30 start_index: 38 end_index: 39
26	ExprTuple	31, 38, 32
27	Literal
28	ExprTuple	31, 32
29	Lambda	parameter: 49 body: 33
30	Lambda	parameter: 49 body: 34
31	ExprRange	lambda_map: 35 start_index: 38 end_index: 36
32	ExprRange	lambda_map: 37 start_index: 38 end_index: 39
33	Operation	operator: 41 operands: 40
34	Operation	operator: 41 operands: 42
35	Lambda	parameter: 49 body: 43
36	Variable
37	Lambda	parameter: 49 body: 44
38	Literal
39	Variable
40	ExprTuple	43, 45
41	Literal
42	ExprTuple	44, 45
43	IndexedVar	variable: 46 index: 49
44	IndexedVar	variable: 47 index: 49
45	Literal
46	Variable
47	Variable
48	ExprTuple	49
49	Variable