Hello, I just had a quick question about countability.

Let be a countable set, so there exists a map such that is injective. How can I show that there is a bijection between these sets?

Any help would be appreciated.

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- Sep 11th 2011, 09:43 AM #1
## Countabilty [SOLVED]

Hello, I just had a quick question about countability.

Let be a countable set, so there exists a map such that is injective. How can I show that there is a bijection between these sets?

Any help would be appreciated.

- Sep 11th 2011, 09:56 AM #2
## Re: Countabilty [SOLVED]

A quick introduction to countability solution found here