Expression of type Forall

from the theory of proveit.linear_algebra.scalar_multiplication

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 ExprRange, IndexedVar, K, V, Variable, a, n, x
from proveit.core_expr_types import x_1_to_n
from proveit.linear_algebra import ScalarMult, VecAdd, VecSpaces
from proveit.logic import Equals, Forall
from proveit.numbers import Natural, one

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = Forall(instance_param_or_params = [V], instance_expr = Forall(instance_param_or_params = [n], instance_expr = Forall(instance_param_or_params = [a], instance_expr = Forall(instance_param_or_params = [x_1_to_n], instance_expr = Equals(ScalarMult(a, VecAdd(x_1_to_n)), VecAdd(ExprRange(sub_expr1, ScalarMult(a, IndexedVar(x, sub_expr1)), one, n))).with_wrapping_at(2), domain = V), domain = K), domain = Natural), domain = VecSpaces(K))

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())

\forall_{V \underset{{\scriptscriptstyle c}}{\in} \textrm{VecSpaces}\left(K\right)}~\left[\forall_{n \in \mathbb{N}}~\left[\forall_{a \in K}~\left[\forall_{x_{1}, x_{2}, \ldots, x_{n} \in V}~\left(\begin{array}{c} \begin{array}{l} \left(a \cdot \left(x_{1} +  x_{2} +  \ldots +  x_{n}\right)\right) =  \\ \left(\left(a \cdot x_{1}\right) +  \left(a \cdot x_{2}\right) +  \ldots +  \left(a \cdot x_{n}\right)\right) \end{array} \end{array}\right)\right]\right]\right]

stored_expr.style_options()

name	description	default	current value	related methods
with_wrapping	If 'True', wrap the Expression after the parameters	None	None/False	('with_wrapping',)
condition_wrapping	Wrap 'before' or 'after' the condition (or None).	None	None/False	('with_wrap_after_condition', 'with_wrap_before_condition')
wrap_params	If 'True', wraps every two parameters AND wraps the Expression after the parameters	None	None/False	('with_params',)
justification	justify to the 'left', 'center', or 'right' in the array cells	center	center	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Operation	operator: 26 operand: 2
1	ExprTuple	2
2	Lambda	parameter: 54 body: 4
3	ExprTuple	54
4	Conditional	value: 5 condition: 6
5	Operation	operator: 26 operand: 10
6	Operation	operator: 8 operands: 9
7	ExprTuple	10
8	Literal
9	ExprTuple	54, 11
10	Lambda	parameter: 57 body: 13
11	Operation	operator: 14 operand: 30
12	ExprTuple	57
13	Conditional	value: 16 condition: 17
14	Literal
15	ExprTuple	30
16	Operation	operator: 26 operand: 20
17	Operation	operator: 50 operands: 19
18	ExprTuple	20
19	ExprTuple	57, 21
20	Lambda	parameter: 60 body: 23
21	Literal
22	ExprTuple	60
23	Conditional	value: 24 condition: 25
24	Operation	operator: 26 operand: 29
25	Operation	operator: 50 operands: 28
26	Literal
27	ExprTuple	29
28	ExprTuple	60, 30
29	Lambda	parameters: 48 body: 31
30	Variable
31	Conditional	value: 32 condition: 33
32	Operation	operator: 34 operands: 35
33	Operation	operator: 36 operands: 37
34	Literal
35	ExprTuple	38, 39
36	Literal
37	ExprTuple	40
38	Operation	operator: 58 operands: 41
39	Operation	operator: 47 operands: 42
40	ExprRange	lambda_map: 43 start_index: 56 end_index: 57
41	ExprTuple	60, 44
42	ExprTuple	45
43	Lambda	parameter: 64 body: 46
44	Operation	operator: 47 operands: 48
45	ExprRange	lambda_map: 49 start_index: 56 end_index: 57
46	Operation	operator: 50 operands: 51
47	Literal
48	ExprTuple	52
49	Lambda	parameter: 64 body: 53
50	Literal
51	ExprTuple	61, 54
52	ExprRange	lambda_map: 55 start_index: 56 end_index: 57
53	Operation	operator: 58 operands: 59
54	Variable
55	Lambda	parameter: 64 body: 61
56	Literal
57	Variable
58	Literal
59	ExprTuple	60, 61
60	Variable
61	IndexedVar	variable: 62 index: 64
62	Variable
63	ExprTuple	64
64	Variable