Recent content by ckr21

@earlh the only definition I have is A is closed if A compliment is open

So if I prove that Ec is open \Rightarrow E contains its cluster points, then I proved one way of this proof since it is a iff Have you proved this yet? Did you figure out how to do the other half of the problem? No i still haven't I have to figure it out by tomorrow...I had to...

ok how you explained cluster point to me helps a little bit. Yeah topology is very difficult and i don't think i like it...

How can it be of and not in...the wording to me just doesn't make sense, this whole subject does not make sense to me. its not logical to me.

I don't understand than. Oh well thanks for trying

If there is one cluster point in Ec I think it could be open but not all cluster points. Ummm, but you said a cluster point in E also in Ec, how could it be in both. I have a hard time understanding all of this to begin with sorry if my reasoning and questions do not make since. The...

[b]1. Prove that a set is closed if and only if it contains all of its cluster points. [b]2. Can I use part of the Lemma here that states: Every interior point of A is a Cluster point. Also what exactly is the definition of a closed set other than a set is closed if its compliment is...