/sci/ - Science & Math

>>12063072
how is this still not common knowledge?

>>11753181
First, define infinity, which is well-defined on the extended real number line.
If infinity-1 is positive, then what's infinity+1?

1-infinity.

In the extended reals, [math]\mathbb{R}\cup\{\infty\}[/math], if I define 'x' on the interval [math](0,\infty)[/math], does that include the negatives, or just the positives?