Hi guys,

I have to find the closure of , and in various topologies.

1. In the standard topology, I think , and

2. Now, for the finite complement topology, I'm unsure for both K and A.

3. The upper limit topology, I'm also unsure for both K and A.

4. The topology with basis I think for both K and A is the set of all positive real numbers.

Thanks alot in advance,

HTale.