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Expression of type ExprTuple

from the theory of proveit.numbers.absolute_value

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, ExprTuple, Lambda, a
from proveit.logic import And, InSet, NotEquals
from proveit.numbers import Abs, Complex, zero
In [2]:
# build up the expression from sub-expressions
expr = ExprTuple(Lambda(a, Conditional(NotEquals(Abs(a), zero), And(InSet(a, Complex), 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 \mapsto \left\{\left|a\right| \neq 0 \textrm{ if } a \in \mathbb{C} ,  a \neq 0\right..\right)
In [5]:
stored_expr.style_options()
no style options
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0ExprTuple1
1Lambdaparameter: 18
body: 2
2Conditionalvalue: 3
condition: 4
3Operationoperator: 15
operands: 5
4Operationoperator: 6
operands: 7
5ExprTuple8, 19
6Literal
7ExprTuple9, 10
8Operationoperator: 11
operand: 18
9Operationoperator: 13
operands: 14
10Operationoperator: 15
operands: 16
11Literal
12ExprTuple18
13Literal
14ExprTuple18, 17
15Literal
16ExprTuple18, 19
17Literal
18Variable
19Literal