Hi...I'm new to the forum but I need help with the following question.(adsbygoogle = window.adsbygoogle || []).push({});

I need to find a topology on N for which there are exactly k limit points. k is a positive integer.

Tips I have received: find countable subsets in R...then a bijection will produce the needed topology on N?

Any help is greatly appreciated.

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# Topology on N

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