Expression of type Forall

from the theory of proveit.core_expr_types.tuples

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, i, j, k, l
from proveit.core_expr_types.tuples import neg_shift_equiv
from proveit.logic import Equals, Forall, InSet
from proveit.numbers import Natural, one, subtract

# build up the expression from sub-expressions
expr = Forall(instance_param_or_params = [i, j, k, l], instance_expr = neg_shift_equiv, conditions = [InSet(subtract(subtract(j, one), i), Natural), Equals(k, subtract(i, a)), Equals(l, subtract(j, 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())

\forall_{i, j, k, l~|~\left(\left(j - 1\right) - i\right) \in \mathbb{N}, k = \left(i - a\right), l = \left(j - a\right)}~\left(\left(f\left(i\right), f\left(i - 1\right), \ldots, f\left(j\right)\right) = \left(f\left(k + a\right), f\left(\left(k - 1\right) + a\right), \ldots, f\left(l + a\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: 1 operand: 3
1	Literal
2	ExprTuple	3
3	Lambda	parameters: 4 body: 5
4	ExprTuple	56, 54, 43, 44
5	Conditional	value: 6 condition: 7
6	Operation	operator: 21 operands: 8
7	Operation	operator: 9 operands: 10
8	ExprTuple	11, 12
9	Literal
10	ExprTuple	13, 14, 15
11	ExprTuple	16
12	ExprTuple	17
13	Operation	operator: 18 operands: 19
14	Operation	operator: 21 operands: 20
15	Operation	operator: 21 operands: 22
16	ExprRange	lambda_map: 23 start_index: 46 end_index: 24
17	ExprRange	lambda_map: 25 start_index: 26 end_index: 27
18	Literal
19	ExprTuple	28, 29
20	ExprTuple	43, 30
21	Literal
22	ExprTuple	44, 31
23	Lambda	parameter: 63 body: 32
24	Operation	operator: 60 operand: 54
25	Lambda	parameter: 63 body: 34
26	Operation	operator: 60 operand: 43
27	Operation	operator: 60 operand: 44
28	Operation	operator: 52 operands: 37
29	Literal
30	Operation	operator: 52 operands: 38
31	Operation	operator: 52 operands: 39
32	Operation	operator: 41 operand: 57
33	ExprTuple	54
34	Operation	operator: 41 operand: 48
35	ExprTuple	43
36	ExprTuple	44
37	ExprTuple	45, 46
38	ExprTuple	56, 47
39	ExprTuple	54, 47
40	ExprTuple	57
41	Variable
42	ExprTuple	48
43	Variable
44	Variable
45	Operation	operator: 52 operands: 49
46	Operation	operator: 60 operand: 56
47	Operation	operator: 60 operand: 58
48	Operation	operator: 52 operands: 53
49	ExprTuple	54, 55
50	ExprTuple	56
51	ExprTuple	58
52	Literal
53	ExprTuple	57, 58
54	Variable
55	Operation	operator: 60 operand: 62
56	Variable
57	Operation	operator: 60 operand: 63
58	Variable
59	ExprTuple	62
60	Literal
61	ExprTuple	63
62	Literal
63	Variable