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Expression of type Conditional

from the theory of proveit.logic.booleans.disjunction

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 A, B, Conditional
from proveit.logic import And, Boolean, InSet, Not, Or
In [2]:
# build up the expression from sub-expressions
expr = Conditional(Or(A, B), And(InSet(A, Boolean), InSet(B, Boolean), Not(And(Not(A), Not(B)))))
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\{A \lor B \textrm{ if } A \in \mathbb{B} ,  B \in \mathbb{B} ,  \lnot \left((\lnot A) \land (\lnot B)\right)\right..
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
condition_delimiter'comma' or 'and'commacomma('with_comma_delimiter', 'with_conjunction_delimiter')
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Conditionalvalue: 1
condition: 2
1Operationoperator: 3
operands: 4
2Operationoperator: 15
operands: 5
3Literal
4ExprTuple22, 23
5ExprTuple6, 7, 8
6Operationoperator: 10
operands: 9
7Operationoperator: 10
operands: 11
8Operationoperator: 20
operand: 14
9ExprTuple22, 13
10Literal
11ExprTuple23, 13
12ExprTuple14
13Literal
14Operationoperator: 15
operands: 16
15Literal
16ExprTuple17, 18
17Operationoperator: 20
operand: 22
18Operationoperator: 20
operand: 23
19ExprTuple22
20Literal
21ExprTuple23
22Variable
23Variable