logo
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 ExprTuple, Lambda, P
from proveit.logic import Boolean, InSet
from proveit.logic.booleans.quantification import general_forall_Px
In [2]:
# build up the expression from sub-expressions
expr = ExprTuple(Lambda(P, InSet(general_forall_Px, Boolean)))
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())
\left(P \mapsto \left(\left[\forall_{x_{1}, x_{2}, \ldots, x_{n}}~P\left(x_{1}, x_{2}, \ldots, x_{n}\right)\right] \in \mathbb{B}\right)\right)
In [5]:
stored_expr.style_options()
no style options
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0ExprTuple1
1Lambdaparameter: 12
body: 3
2ExprTuple12
3Operationoperator: 4
operands: 5
4Literal
5ExprTuple6, 7
6Operationoperator: 8
operand: 10
7Literal
8Literal
9ExprTuple10
10Lambdaparameters: 13
body: 11
11Operationoperator: 12
operands: 13
12Variable
13ExprTuple14
14ExprRangelambda_map: 15
start_index: 16
end_index: 17
15Lambdaparameter: 21
body: 18
16Literal
17Variable
18IndexedVarvariable: 19
index: 21
19Variable
20ExprTuple21
21Variable