- #1
Kocur
- 12
- 0
I am a computer scientist that only recently got interested in topology. I have got the following question:
How to prove, in an elegant way, that an arbitrary sum of open intervals (a, b), where a is in R and b is in R, is open?
I have got some kind of a proof, but I am not sure it is right. Moreover, it is very bulky and I do not like it.
Thanx in advance.
How to prove, in an elegant way, that an arbitrary sum of open intervals (a, b), where a is in R and b is in R, is open?
I have got some kind of a proof, but I am not sure it is right. Moreover, it is very bulky and I do not like it.
Thanx in advance.