What exactly is a countable union? – math.stackexchange.com

What exactly is a countable union? – math.stackexchange.com

13:22 No Comments
For example, $A_i$ be the set of all numbers divisible by $i$, consider: $\bigcup_{n \in \mathbb{N}} A_n$ Is this union a countable union because I am enumerating over a countable set (the natural ...

from Hot Questions - Stack Exchange OnStackOverflow
via Blogspot

Share this

Unknown

0 Comment to "What exactly is a countable union? – math.stackexchange.com"

Post a Comment

Subscribe to: Post Comments (Atom)