logo

Expression of type Conditional

from the theory of proveit.statistics

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, Qx, Rx, X, x
from proveit.logic import Equals, InSet, Not
In [2]:
# build up the expression from sub-expressions
expr = Conditional(Equals(Qx, Not(Rx)), InSet(x, X))
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\{Q\left(x\right) = (\lnot R\left(x\right)) \textrm{ if } x \in X\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: 5
operands: 6
3Literal
4ExprTuple7, 8
5Literal
6ExprTuple16, 9
7Operationoperator: 10
operand: 16
8Operationoperator: 11
operand: 13
9Variable
10Variable
11Literal
12ExprTuple13
13Operationoperator: 14
operand: 16
14Variable
15ExprTuple16
16Variable