Expression of type Forall

from the theory of proveit.logic.booleans.disjunction

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, Function, P, Pk, Variable, i, j, k
from proveit.logic import Equals, Exists, Forall, Or
from proveit.numbers import Add, Integer, Interval, LessEq, one

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = Forall(instance_param_or_params = [i, j], instance_expr = Forall(instance_param_or_params = [P], instance_expr = Equals(Or(ExprRange(sub_expr1, Function(P, [sub_expr1]), i, j)), Exists(instance_param_or_params = [k], instance_expr = Pk, domain = Interval(i, j))), condition = LessEq(i, Add(j, one))), domain = Integer)

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 \in \mathbb{Z}}~\left[\forall_{P~|~i \leq \left(j + 1\right)}~\left(\left(P\left(i\right) \lor  P\left(i + 1\right) \lor  \ldots \lor  P\left(j\right)\right) = \left[\exists_{k \in \{i~\ldotp \ldotp~j\}}~P\left(k\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: 6 operand: 2
1	ExprTuple	2
2	Lambda	parameters: 50 body: 3
3	Conditional	value: 4 condition: 5
4	Operation	operator: 6 operand: 10
5	Operation	operator: 8 operands: 9
6	Literal
7	ExprTuple	10
8	Literal
9	ExprTuple	11, 12
10	Lambda	parameter: 42 body: 14
11	Operation	operator: 44 operands: 15
12	Operation	operator: 44 operands: 16
13	ExprTuple	42
14	Conditional	value: 17 condition: 18
15	ExprTuple	51, 19
16	ExprTuple	52, 19
17	Operation	operator: 20 operands: 21
18	Operation	operator: 22 operands: 23
19	Literal
20	Literal
21	ExprTuple	24, 25
22	Literal
23	ExprTuple	51, 26
24	Operation	operator: 27 operands: 28
25	Operation	operator: 29 operand: 34
26	Operation	operator: 31 operands: 32
27	Literal
28	ExprTuple	33
29	Literal
30	ExprTuple	34
31	Literal
32	ExprTuple	52, 35
33	ExprRange	lambda_map: 36 start_index: 51 end_index: 52
34	Lambda	parameter: 47 body: 37
35	Literal
36	Lambda	parameter: 46 body: 38
37	Conditional	value: 39 condition: 40
38	Operation	operator: 42 operand: 46
39	Operation	operator: 42 operand: 47
40	Operation	operator: 44 operands: 45
41	ExprTuple	46
42	Variable
43	ExprTuple	47
44	Literal
45	ExprTuple	47, 48
46	Variable
47	Variable
48	Operation	operator: 49 operands: 50
49	Literal
50	ExprTuple	51, 52
51	Variable
52	Variable