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Expression of type Conditional

from the theory of proveit.numbers.exponentiation

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, a, b, c
from proveit.logic import And, Equals, InSet, NotEquals
from proveit.numbers import Complex, Exp, Mult, Neg, Real, zero
In [2]:
# build up the expression from sub-expressions
expr = Conditional(Equals(Exp(Exp(a, Neg(b)), c), Exp(a, Neg(Mult(b, c)))), And(InSet(a, Complex), InSet(b, Real), InSet(c, Real), NotEquals(a, zero)))
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^{-b})^{c} = a^{-\left(b \cdot c\right)} \textrm{ if } a \in \mathbb{C} ,  b \in \mathbb{R} ,  c \in \mathbb{R} ,  a \neq 0\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
6ExprTuple9, 10, 11, 12
7Operationoperator: 26
operands: 13
8Operationoperator: 26
operands: 14
9Operationoperator: 17
operands: 15
10Operationoperator: 17
operands: 16
11Operationoperator: 17
operands: 18
12Operationoperator: 19
operands: 20
13ExprTuple21, 37
14ExprTuple29, 22
15ExprTuple29, 23
16ExprTuple36, 24
17Literal
18ExprTuple37, 24
19Literal
20ExprTuple29, 25
21Operationoperator: 26
operands: 27
22Operationoperator: 32
operand: 31
23Literal
24Literal
25Literal
26Literal
27ExprTuple29, 30
28ExprTuple31
29Variable
30Operationoperator: 32
operand: 36
31Operationoperator: 34
operands: 35
32Literal
33ExprTuple36
34Literal
35ExprTuple36, 37
36Variable
37Variable