# from the theory of proveit.numbers.integration¶

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.
# import Expression classes needed to build the expression
from proveit import Conditional, a, b, fx, x
from proveit.logic import InSet
from proveit.numbers import IntervalCC, Real

In [2]:
# build up the expression from sub-expressions
expr = Conditional(InSet(fx, Real), InSet(x, IntervalCC(a, 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\{f\left(x\right) \in \mathbb{R} \textrm{ if } x \in \left[a,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: 4
operands: 3
2Operationoperator: 4
operands: 5
3ExprTuple6, 7
4Literal
5ExprTuple13, 8
6Operationoperator: 9
operand: 13
7Literal
8Operationoperator: 11
operands: 12
9Variable
10ExprTuple13
11Literal
12ExprTuple14, 15
13Variable
14Variable
15Variable