Expression of type Sum

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 i
from proveit.numbers import Add, Interval, Sum, one, six, subtract, two

# build up the expression from sub-expressions
expr = Sum(index_or_indices = [i], summand = Add(subtract(i, one), two), domain = Interval(Add(two, one), Add(six, one)))

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())

\sum_{i = 2 + 1}^{6 + 1} \left(\left(i - 1\right) + 2\right)

stored_expr.style_options()

name	description	default	current value	related methods
with_wrapping	If 'True', wrap the Expression after the parameters	None	None/False	('with_wrapping',)
condition_wrapping	Wrap 'before' or 'after' the condition (or None).	None	None/False	('with_wrap_after_condition', 'with_wrap_before_condition')
wrap_params	If 'True', wraps every two parameters AND wraps the Expression after the parameters	None	None/False	('with_params',)
justification	justify to the 'left', 'center', or 'right' in the array cells	center	center	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Operation	operator: 1 operand: 3
1	Literal
2	ExprTuple	3
3	Lambda	parameter: 16 body: 5
4	ExprTuple	16
5	Conditional	value: 6 condition: 7
6	Operation	operator: 23 operands: 8
7	Operation	operator: 9 operands: 10
8	ExprTuple	11, 25
9	Literal
10	ExprTuple	16, 12
11	Operation	operator: 23 operands: 13
12	Operation	operator: 14 operands: 15
13	ExprTuple	16, 17
14	Literal
15	ExprTuple	18, 19
16	Variable
17	Operation	operator: 20 operand: 27
18	Operation	operator: 23 operands: 22
19	Operation	operator: 23 operands: 24
20	Literal
21	ExprTuple	27
22	ExprTuple	25, 27
23	Literal
24	ExprTuple	26, 27
25	Literal
26	Literal
27	Literal