Hello ! which is the maximal element of the set S={ {1,2},{1,2,3},{3,4},{4,5}} which A<=B <=>$A \subseteq B$, which is the maximal elements by zorns lemma ?????
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Originally Posted by john27 Hello ! which is the maximal element of the set $\displaystyle S=\{ \{1,2\},\{1,2,3\},\{3,4\},\{4,5\}\}$ which $\displaystyle A\le B \iff A \subseteq B$, which is the maximal elements by Zorn's lemma ????? What is the definition of maximal element ? How would we apply it here?
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