Zorn's Lemma/Historical Note

Historical Note on Zorn's Lemma
Zorn's Lemma was published by in $1935$.

However, it had previously been reported by in $1922$, in a slightly different (and simpler) form.

Hence this result is sometimes known as the Kuratowski-Zorn Lemma.

himself fully acknowledged in his own publication of this result.

He was apparently somewhat embarrassed to have had it named after him, rather than Kuratowski.

himself had not attached any particular importance to it, considering it a straightforward corollary of Hausdorff's Maximal Principle.