Can you mention a set in $\displaystyle R^2$ which is neither open nor closed.

Thanks

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- Nov 3rd 2010, 08:53 PMosodudSet in R^2 which is neither open nor closed.
Can you mention a set in $\displaystyle R^2$ which is neither open nor closed.

Thanks - Nov 3rd 2010, 09:35 PMFailure
- Nov 3rd 2010, 11:46 PMCaptainBlack