Expression of type ExprTuple

from the theory of proveit.numbers.negation

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 ExprTuple, a, b
from proveit.logic import Equals, InSet
from proveit.numbers import Natural, Neg

# build up the expression from sub-expressions
expr = ExprTuple(InSet(a, Natural), InSet(b, Natural), [Equals(Neg(a), Neg(b))])

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 \in \mathbb{N}, b \in \mathbb{N}, \left(\left(-a\right) = \left(-b\right)\right)\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	Operation	operator: 5 operands: 4
2	Operation	operator: 5 operands: 6
3	ExprTuple	7
4	ExprTuple	16, 8
5	Literal
6	ExprTuple	17, 8
7	Operation	operator: 9 operands: 10
8	Literal
9	Literal
10	ExprTuple	11, 12
11	Operation	operator: 14 operand: 16
12	Operation	operator: 14 operand: 17
13	ExprTuple	16
14	Literal
15	ExprTuple	17
16	Variable
17	Variable