Expression of type Equals

from the theory of proveit.linear_algebra.addition

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, beta, x, y
from proveit.linear_algebra import ScalarMult, VecAdd
from proveit.logic import Equals

# build up the expression from sub-expressions
sub_expr1 = ScalarMult(beta, y)
expr = Equals(VecAdd(ScalarMult(a, x), ScalarMult(a, sub_expr1)), ScalarMult(a, VecAdd(x, sub_expr1))).with_wrapping_at(2)

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())

\begin{array}{c} \begin{array}{l} \left(\left(a \cdot x\right) + \left(a \cdot \left(\beta \cdot y\right)\right)\right) =  \\ \left(a \cdot \left(x + \left(\beta \cdot y\right)\right)\right) \end{array} \end{array}

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.	()	(2)	('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: 12 operands: 5
4	Operation	operator: 17 operands: 6
5	ExprTuple	7, 8
6	ExprTuple	14, 9
7	Operation	operator: 17 operands: 10
8	Operation	operator: 17 operands: 11
9	Operation	operator: 12 operands: 13
10	ExprTuple	14, 15
11	ExprTuple	14, 16
12	Literal
13	ExprTuple	15, 16
14	Variable
15	Variable
16	Operation	operator: 17 operands: 18
17	Literal
18	ExprTuple	19, 20
19	Variable
20	Variable