Expression of type Equals

from the theory of proveit.physics.quantum.algebra

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, C, ExprRange, Variable, alpha, beta
from proveit.core_expr_types import Len
from proveit.linear_algebra import VecAdd
from proveit.logic import Equals
from proveit.numbers import five, one
from proveit.physics.quantum import bra_varphi, ket_psi

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = Equals(Len(operands = [bra_varphi, alpha, VecAdd(A, B, C), beta, ket_psi]), Len(operands = [ExprRange(sub_expr1, sub_expr1, one, five)]))

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(\langle \varphi \rvert, \alpha, A + B + C, \beta, \lvert \psi \rangle\right)| = |\left(1, 2, \ldots, 5\right)|

stored_expr.style_options()

name	description	default	current value	related methods
operation	'infix' or 'function' style formatting	infix	infix
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',)
direction	Direction of the relation (normal or reversed)	normal	normal	('with_direction_reversed', 'is_reversed')

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Operation	operator: 1 operands: 2
1	Literal
2	ExprTuple	3, 4
3	Operation	operator: 6 operands: 5
4	Operation	operator: 6 operands: 7
5	ExprTuple	8, 9, 10, 11, 12
6	Literal
7	ExprTuple	13
8	Operation	operator: 14 operand: 23
9	Variable
10	Operation	operator: 16 operands: 17
11	Variable
12	Operation	operator: 18 operand: 27
13	ExprRange	lambda_map: 20 start_index: 21 end_index: 22
14	Literal
15	ExprTuple	23
16	Literal
17	ExprTuple	24, 25, 26
18	Literal
19	ExprTuple	27
20	Lambda	parameter: 29 body: 29
21	Literal
22	Literal
23	Variable
24	Variable
25	Variable
26	Variable
27	Variable
28	ExprTuple	29
29	Variable