Kuratowski's Lemma/Historical Note
Jump to navigation Jump to search
Historical Note on Kuratowski's Lemma
Kazimierz Kuratowski published what is now known as Kuratowski's Lemma in $1922$, thinking it little more than a corollary of Hausdorff's Maximal Principle.
In $1935$, Max August Zorn published his own equivalent, now known as Zorn's Lemma, acknowledging Kuratowski's earlier work.
This later version became the more famous one.
- 1922: Kazimierz Kuratowski: Une méthode d'élimination des nombres transfinis des raisonnements mathématiques (Fund. Math. Vol. 3: pp. 76 – 108)
- 1935: Max August Zorn: A remark on method in transfinite algebra (Bull. Amer. Math. Soc. Vol. 41: pp. 667 – 670)
- 1964: Steven A. Gaal: Point Set Topology ... (previous) ... (next): Introduction to Set Theory: Notes