Expression of type Conditional

from the theory of proveit.physics.quantum.circuits

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 A, B, Conditional, S, k
from proveit.logic import Equals
from proveit.physics.quantum.circuits import Input, MultiQubitElem

# build up the expression from sub-expressions
expr = Conditional(Equals(MultiQubitElem(element = Input(state = A, part = k), targets = S), MultiQubitElem(element = Input(state = B, part = k), targets = S)), Equals(A, B))

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\{\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{A~\mbox{part}~k~\mbox{on}~S} & \qw 
} \end{array} = \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{B~\mbox{part}~k~\mbox{on}~S} & \qw 
} \end{array} \textrm{ if } A = B\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: 4 operands: 3
2	Operation	operator: 4 operands: 5
3	ExprTuple	6, 7
4	Literal
5	ExprTuple	17, 18
6	Operation	operator: 9 operands: 8
7	Operation	operator: 9 operands: 10
8	NamedExprs	element: 11 targets: 13
9	Literal
10	NamedExprs	element: 12 targets: 13
11	Operation	operator: 15 operands: 14
12	Operation	operator: 15 operands: 16
13	Variable
14	NamedExprs	state: 17 part: 19
15	Literal
16	NamedExprs	state: 18 part: 19
17	Variable
18	Variable
19	Variable