Expression of type Equals

from the theory of proveit.linear_algebra.tensors

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, u, v, w, x, y, z
from proveit.linear_algebra import ScalarMult, TensorProd, VecAdd
from proveit.logic import Equals

# build up the expression from sub-expressions
sub_expr1 = ScalarMult(a, v)
expr = Equals(TensorProd(u, sub_expr1, VecAdd(w, x, y), z), VecAdd(TensorProd(u, sub_expr1, w, z), TensorProd(u, sub_expr1, x, z), TensorProd(u, sub_expr1, y, z)))

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(u {\otimes} \left(a \cdot v\right) {\otimes} \left(w + x + y\right) {\otimes} z\right) = \left(\left(u {\otimes} \left(a \cdot v\right) {\otimes} w {\otimes} z\right) + \left(u {\otimes} \left(a \cdot v\right) {\otimes} x {\otimes} z\right) + \left(u {\otimes} \left(a \cdot v\right) {\otimes} y {\otimes} z\right)\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: 15 operands: 5
4	Operation	operator: 11 operands: 6
5	ExprTuple	19, 20, 7, 22
6	ExprTuple	8, 9, 10
7	Operation	operator: 11 operands: 12
8	Operation	operator: 15 operands: 13
9	Operation	operator: 15 operands: 14
10	Operation	operator: 15 operands: 16
11	Literal
12	ExprTuple	17, 18, 21
13	ExprTuple	19, 20, 17, 22
14	ExprTuple	19, 20, 18, 22
15	Literal
16	ExprTuple	19, 20, 21, 22
17	Variable
18	Variable
19	Variable
20	Operation	operator: 23 operands: 24
21	Variable
22	Variable
23	Literal
24	ExprTuple	25, 26
25	Variable
26	Variable