Expression of type IndexedVar

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 Function, IndexedVar, S, Variable, p

# build up the expression from sub-expressions
expr = IndexedVar(S, [Function(p, [Variable("_b", latex_format = r"{_{-}b}")]), Variable("_a", latex_format = r"{_{-}a}")])

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())

S_{p\left({_{-}b}\right), {_{-}a}}

stored_expr.style_options()

name	description	default	current value	related methods
wrap_positions	position(s) at which wrapping is to occur; '2 n - 1' is after the nth operand, '2 n' is after the nth operation.	()	()	('with_wrapping_at', 'with_wrap_before_operator', 'with_wrap_after_operator', 'without_wrapping', 'wrap_positions')
justification	if any wrap positions are set, justify to the 'left', 'center', or 'right'	center	center	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	IndexedVar	variable: 1 indices: 2
1	Variable
2	ExprTuple	3, 4
3	Operation	operator: 5 operand: 7
4	Variable
5	Variable
6	ExprTuple	7
7	Variable