Expression of type Conditional

from the theory of proveit.core_expr_types.conditionals

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, R, a
from proveit.core_expr_types import Q_1_to_m
from proveit.logic import And

# build up the expression from sub-expressions
expr = Conditional(a, And(And(Q_1_to_m), R))

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 \textrm{ if } Q_{1} \land  Q_{2} \land  \ldots \land  Q_{m} ,  R\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	Variable
2	Operation	operator: 6 operands: 3
3	ExprTuple	4, 5
4	Operation	operator: 6 operands: 7
5	Variable
6	Literal
7	ExprTuple	8
8	ExprRange	lambda_map: 9 start_index: 10 end_index: 11
9	Lambda	parameter: 15 body: 12
10	Literal
11	Variable
12	IndexedVar	variable: 13 index: 15
13	Variable
14	ExprTuple	15
15	Variable