I know it is not necessary for the supreme of a set be an element of the set.

Can someone please justify this by giving suitable examples?

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- Aug 6th 2013, 07:39 PM #1

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- Aug 6th 2013, 08:38 PM #2

- Aug 7th 2013, 05:21 AM #3

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- Aug 7th 2013, 02:57 PM #4

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