Expression of type Conditional

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, Function, Q, f
from proveit.core_expr_types import a_1_to_i, b_1_to_j, c_1_to_k
from proveit.numbers import Mult

# build up the expression from sub-expressions
sub_expr1 = [b_1_to_j]
expr = Conditional(Mult(a_1_to_i, Function(f, sub_expr1), c_1_to_k), Function(Q, sub_expr1))

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\{a_{1} \cdot  a_{2} \cdot  \ldots \cdot  a_{i} \cdot f\left(b_{1}, b_{2}, \ldots, b_{j}\right)\cdot c_{1} \cdot  c_{2} \cdot  \ldots \cdot  c_{k} \textrm{ if } Q\left(b_{1}, b_{2}, \ldots, b_{j}\right)\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 operands: 4
2	Operation	operator: 5 operands: 12
3	Literal
4	ExprTuple	6, 7, 8
5	Variable
6	ExprRange	lambda_map: 9 start_index: 20 end_index: 10
7	Operation	operator: 11 operands: 12
8	ExprRange	lambda_map: 13 start_index: 20 end_index: 14
9	Lambda	parameter: 26 body: 15
10	Variable
11	Variable
12	ExprTuple	16
13	Lambda	parameter: 26 body: 17
14	Variable
15	IndexedVar	variable: 18 index: 26
16	ExprRange	lambda_map: 19 start_index: 20 end_index: 21
17	IndexedVar	variable: 22 index: 26
18	Variable
19	Lambda	parameter: 26 body: 23
20	Literal
21	Variable
22	Variable
23	IndexedVar	variable: 24 index: 26
24	Variable
25	ExprTuple	26
26	Variable