Expression of type Conditional

from the theory of proveit.physics.quantum.QPE

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, l
from proveit.logic import InSet
from proveit.numbers import Exp, frac, one, subtract, two
from proveit.physics.quantum.QPE import _pos_domain

# build up the expression from sub-expressions
expr = Conditional(frac(one, Exp(subtract(l, one), two)), InSet(l, _pos_domain))

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\{\frac{1}{\left(l - 1\right)^{2}} \textrm{ if } l \in \{e + 1~\ldotp \ldotp~2^{t - 1}\}\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: 6
3	Literal
4	ExprTuple	29, 7
5	Literal
6	ExprTuple	19, 8
7	Operation	operator: 17 operands: 9
8	Operation	operator: 10 operands: 11
9	ExprTuple	12, 21
10	Literal
11	ExprTuple	13, 14
12	Operation	operator: 23 operands: 15
13	Operation	operator: 23 operands: 16
14	Operation	operator: 17 operands: 18
15	ExprTuple	19, 26
16	ExprTuple	20, 29
17	Literal
18	ExprTuple	21, 22
19	Variable
20	Variable
21	Literal
22	Operation	operator: 23 operands: 24
23	Literal
24	ExprTuple	25, 26
25	Literal
26	Operation	operator: 27 operand: 29
27	Literal
28	ExprTuple	29
29	Literal