Aspects of this topic are discussed in the following places at Britannica.
In 1935 the German-born American mathematician Max Zorn proposed adding the maximum principle to the standard axioms of set theory (see the table). (Informally, a closed collection of sets contains a maximal member—a set that cannot be contained in any other set in the collection.) Although it is now known that Zorn was not the first to suggest the maximum principle (the Polish...
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