logo

Expression of type Forall

from the theory of proveit.logic.booleans.conjunction

In [1]:
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 m, n
from proveit.core_expr_types import A_1_to_m, C_1_to_n
from proveit.logic import And, Boolean, Equals, FALSE, Forall
from proveit.numbers import Natural
In [2]:
# build up the expression from sub-expressions
expr = Forall(instance_param_or_params = [m, n], instance_expr = Forall(instance_param_or_params = [A_1_to_m, C_1_to_n], instance_expr = Equals(And(A_1_to_m, FALSE, C_1_to_n), FALSE), domain = Boolean), domain = Natural)
expr:
In [3]:
# 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
In [4]:
# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())
\forall_{m, n \in \mathbb{N}}~\left[\forall_{A_{1}, A_{2}, \ldots, A_{m}, C_{1}, C_{2}, \ldots, C_{n} \in \mathbb{B}}~\left(\left(A_{1} \land  A_{2} \land  \ldots \land  A_{m} \land \bot\land C_{1} \land  C_{2} \land  \ldots \land  C_{n}\right) = \bot\right)\right]
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
with_wrappingIf 'True', wrap the Expression after the parametersNoneNone/False('with_wrapping',)
condition_wrappingWrap 'before' or 'after' the condition (or None).NoneNone/False('with_wrap_after_condition', 'with_wrap_before_condition')
wrap_paramsIf 'True', wraps every two parameters AND wraps the Expression after the parametersNoneNone/False('with_params',)
justificationjustify to the 'left', 'center', or 'right' in the array cellscentercenter('with_justification',)
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 7
operand: 2
1ExprTuple2
2Lambdaparameters: 3
body: 4
3ExprTuple36, 39
4Conditionalvalue: 5
condition: 6
5Operationoperator: 7
operand: 10
6Operationoperator: 26
operands: 9
7Literal
8ExprTuple10
9ExprTuple11, 12
10Lambdaparameters: 13
body: 14
11Operationoperator: 41
operands: 15
12Operationoperator: 41
operands: 16
13ExprTuple30, 32
14Conditionalvalue: 17
condition: 18
15ExprTuple36, 19
16ExprTuple39, 19
17Operationoperator: 20
operands: 21
18Operationoperator: 26
operands: 22
19Literal
20Literal
21ExprTuple23, 31
22ExprTuple24, 25
23Operationoperator: 26
operands: 27
24ExprRangelambda_map: 28
start_index: 38
end_index: 36
25ExprRangelambda_map: 29
start_index: 38
end_index: 39
26Literal
27ExprTuple30, 31, 32
28Lambdaparameter: 49
body: 33
29Lambdaparameter: 49
body: 34
30ExprRangelambda_map: 35
start_index: 38
end_index: 36
31Literal
32ExprRangelambda_map: 37
start_index: 38
end_index: 39
33Operationoperator: 41
operands: 40
34Operationoperator: 41
operands: 42
35Lambdaparameter: 49
body: 43
36Variable
37Lambdaparameter: 49
body: 44
38Literal
39Variable
40ExprTuple43, 45
41Literal
42ExprTuple44, 45
43IndexedVarvariable: 46
index: 49
44IndexedVarvariable: 47
index: 49
45Literal
46Variable
47Variable
48ExprTuple49
49Variable