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Topic: Countably Infinite Sets
Replies: 11   Last Post: Dec 28, 2012 9:08 PM

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Scott Berg

Posts: 2,014
Registered: 12/12/04
Re: Countably Infinite Sets
Posted: Dec 28, 2012 1:51 PM
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"netzweltler" <reinhard_fischer@arcor.de> wrote in message
> Does the set {{1}, {1,2}, {1,2,3}, ...} contain all natural numbers?

no, it would contain the set of all natural numbers.

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