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Expression of type ExprTuple

from the theory of proveit.numbers.summation

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, c, d, fj, gj, j
from proveit.logic import InSet
from proveit.numbers import Interval, Mult
In [2]:
# build up the expression from sub-expressions
expr = ExprTuple(Lambda(j, Conditional(Mult(gj, fj), InSet(j, Interval(c, d)))))
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(j \mapsto \left\{g\left(j\right) \cdot f\left(j\right) \textrm{ if } j \in \{c~\ldotp \ldotp~d\}\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: 17
body: 2
2Conditionalvalue: 3
condition: 4
3Operationoperator: 5
operands: 6
4Operationoperator: 7
operands: 8
5Literal
6ExprTuple9, 10
7Literal
8ExprTuple17, 11
9Operationoperator: 12
operand: 17
10Operationoperator: 13
operand: 17
11Operationoperator: 15
operands: 16
12Variable
13Variable
14ExprTuple17
15Literal
16ExprTuple18, 19
17Variable
18Variable
19Variable