Definition of maximal, greatest, minimal and least elements of a set: http://i.stack.imgur.com/PnI9V.png(adsbygoogle = window.adsbygoogle || []).push({});

Since c is a minimal element but c is not a least element, this implies that there is one element that is not comparable to c. What is that element? What about d and i?

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# Maximal, greatest, minimal and least elements of a set

**Physics Forums | Science Articles, Homework Help, Discussion**