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Expression of type ExprTuple

from the theory of proveit.logic.equality

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 Conditional, ExprTuple, Lambda, P, n
from proveit.core_expr_types import P__x_1_to_n, P__y_1_to_n, x_1_to_n, y_1_to_n
from proveit.logic import Equals, Forall, InSet
from proveit.numbers import Natural
In [2]:
# build up the expression from sub-expressions
expr = ExprTuple(Lambda(n, Conditional(Forall(instance_param_or_params = [P, x_1_to_n, y_1_to_n], instance_expr = P__y_1_to_n, conditions = [P__x_1_to_n, Equals([x_1_to_n], [y_1_to_n])]), InSet(n, 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())
\left(n \mapsto \left\{\forall_{P, x_{1}, x_{2}, \ldots, x_{n}, y_{1}, y_{2}, \ldots, y_{n}~|~P\left(x_{1}, x_{2}, \ldots, x_{n}\right), \left(x_{1}, x_{2}, \ldots, x_{n}\right) = \left(y_{1}, y_{2}, \ldots, y_{n}\right)}~P\left(y_{1}, y_{2}, \ldots, y_{n}\right) \textrm{ if } n \in \mathbb{N}\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: 30
body: 3
2ExprTuple30
3Conditionalvalue: 4
condition: 5
4Operationoperator: 6
operand: 10
5Operationoperator: 8
operands: 9
6Literal
7ExprTuple10
8Literal
9ExprTuple30, 11
10Lambdaparameters: 12
body: 13
11Literal
12ExprTuple20, 25, 26
13Conditionalvalue: 14
condition: 15
14Operationoperator: 20
operands: 24
15Operationoperator: 16
operands: 17
16Literal
17ExprTuple18, 19
18Operationoperator: 20
operands: 23
19Operationoperator: 21
operands: 22
20Variable
21Literal
22ExprTuple23, 24
23ExprTuple25
24ExprTuple26
25ExprRangelambda_map: 27
start_index: 29
end_index: 30
26ExprRangelambda_map: 28
start_index: 29
end_index: 30
27Lambdaparameter: 36
body: 31
28Lambdaparameter: 36
body: 32
29Literal
30Variable
31IndexedVarvariable: 33
index: 36
32IndexedVarvariable: 34
index: 36
33Variable
34Variable
35ExprTuple36
36Variable