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Least But Not The Last (Posted on 2003-05-08) Difficulty: 4 of 5
Prove that every Non-Empty set of Positive Integers contains a "Least Element".

See The Solution Submitted by Ravi Raja    
Rating: 2.7500 (8 votes)

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re(3): {P, r, o, o, f} | Comment 4 of 13 |
(In reply to re(2): {P, r, o, o, f} by Gamer)

Sets, by definition, don't contain duplicates.

My argument against Brian Smith's answer also works against this one. The problem is that sets can be infinite in size.
  Posted by friedlinguini on 2003-05-08 14:14:54

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