Expression of type ExprTuple

from the theory of proveit.numbers.summation

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 ExprRange, ExprTuple, IndexedVar, Variable, a, c, l
from proveit.numbers import Add, Integer, Sum, one, zero

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = ExprTuple(IndexedVar(a, one), Sum(index_or_indices = [l], summand = Add(l, one), domain = Integer), ExprRange(sub_expr1, IndexedVar(c, sub_expr1), one, zero))

expr:

# 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

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\left(a_{1}, \sum_{l \in \mathbb{Z}}~\left(l + 1\right),c_{1}, c_{2}, \ldots, c_{0}\right)

stored_expr.style_options()

name	description	default	current value	related methods
wrap_positions	position(s) at which wrapping is to occur; 'n' is after the nth comma.	()	()	('with_wrapping_at',)
justification	if any wrap positions are set, justify to the 'left', 'center', or 'right'	left	left	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1, 2, 3
1	IndexedVar	variable: 4 index: 23
2	Operation	operator: 6 operand: 10
3	ExprRange	lambda_map: 8 start_index: 23 end_index: 9
4	Variable
5	ExprTuple	23
6	Literal
7	ExprTuple	10
8	Lambda	parameter: 18 body: 11
9	Literal
10	Lambda	parameter: 24 body: 13
11	IndexedVar	variable: 14 index: 18
12	ExprTuple	24
13	Conditional	value: 16 condition: 17
14	Variable
15	ExprTuple	18
16	Operation	operator: 19 operands: 20
17	Operation	operator: 21 operands: 22
18	Variable
19	Literal
20	ExprTuple	24, 23
21	Literal
22	ExprTuple	24, 25
23	Literal
24	Variable
25	Literal