Common N_km1 of type IndexedVar

from the theory of proveit.physics.quantum.circuits

import proveit
# Automation is not needed when only 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 the special expression
from proveit.physics.quantum.circuits import N_km1

# check that the built expression is the same as the stored expression
assert N_km1 == stored_expr
assert N_km1._style_id == stored_expr._style_id
print("Passed sanity check: N_km1 matches stored_expr")

Passed sanity check: N_km1 matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

N_{k - 1}

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	IndexedVar	variable: 1 index: 3
1	Variable
2	ExprTuple	3
3	Operation	operator: 4 operands: 5
4	Literal
5	ExprTuple	6, 7
6	Variable
7	Operation	operator: 8 operand: 10
8	Literal
9	ExprTuple	10
10	Literal