Recent content by dracox

Anyone?

Ok, I think I'll try it your second way. Let (x_0, y_0) be a point in the complement of the set (call it A). How would I proceed from here?

Ah, nevermind, I am familiar with this theorem. I just found it in my textbook. How shall I apply it, though?

Hmm, I'm not familiar with this theorem. Is there somewhere I could read about it on the web? Or, if you're inclined, you could explain it. What would V be in this case?

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...