- #1

- 5

- 0

## Homework Statement

How do I show that a simple set is closed?

Ex: the set of points defined by the parabola y=x^2

## The Attempt at a Solution

Well, a set is closed iff it contains all of its limit points. So, I want to show that this is true for the given set. I'm not exactly sure how to do this. Any help?