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In [1]:
import proveit
# Automation is not needed when only building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_axiom_expr # Load the stored axiom expression as 'stored_expr'
# import the special expression
from proveit.core_expr_types.conditionals import true_case_reduction
In [2]:
# check that the built expression is the same as the stored expression
assert true_case_reduction.expr == stored_expr
assert true_case_reduction.expr._style_id == stored_expr._style_id
print("Passed sanity check: true_case_reduction matches stored_expr")
Passed sanity check: true_case_reduction matches stored_expr
In [3]:
# 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}, b, c_{1}, c_{2}, \ldots, c_{n}}~\left(\left\{\begin{array}{ccc}a_{1} \textrm{ if } \bot \\ a_{2} \textrm{ if } \bot \\  \vdots \\ a_{m} \textrm{ if } \bot \\ b \\ c_{1} \textrm{ if } \bot \\ c_{2} \textrm{ if } \bot \\  \vdots \\ c_{n} \textrm{ if } \bot\end{array}\right.. = b\right)\right]
In [4]:
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 [5]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 7
operand: 2
1ExprTuple2
2Lambdaparameters: 3
body: 4
3ExprTuple33, 36
4Conditionalvalue: 5
condition: 6
5Operationoperator: 7
operand: 11
6Operationoperator: 9
operands: 10
7Literal
8ExprTuple11
9Literal
10ExprTuple12, 13
11Lambdaparameters: 14
body: 15
12Operationoperator: 17
operands: 16
13Operationoperator: 17
operands: 18
14ExprTuple19, 30, 20
15Operationoperator: 21
operands: 22
16ExprTuple33, 23
17Literal
18ExprTuple36, 23
19ExprRangelambda_map: 24
start_index: 35
end_index: 33
20ExprRangelambda_map: 25
start_index: 35
end_index: 36
21Literal
22ExprTuple26, 30
23Literal
24Lambdaparameter: 45
body: 39
25Lambdaparameter: 45
body: 40
26Operationoperator: 27
operands: 28
27Literal
28ExprTuple29, 30, 31
29ExprRangelambda_map: 32
start_index: 35
end_index: 33
30Variable
31ExprRangelambda_map: 34
start_index: 35
end_index: 36
32Lambdaparameter: 45
body: 37
33Variable
34Lambdaparameter: 45
body: 38
35Literal
36Variable
37Conditionalvalue: 39
condition: 41
38Conditionalvalue: 40
condition: 41
39IndexedVarvariable: 42
index: 45
40IndexedVarvariable: 43
index: 45
41Literal
42Variable
43Variable
44ExprTuple45
45Variable