**Zermelo set theory**, as set out in an important paper in 1908 by Ernst Zermelo, is the ancestor of modern set theory. It bears certain differences from its descendants, which are not always understood, and are frequently misquoted. This article sets out the original axioms, with the original text (translated into English) and original numbering.

Read more about Zermelo Set Theory: The Axioms of Zermelo Set Theory, Connection With Standard Set Theory, The Aim of Zermelo's Paper, The Axiom of Separation, Cantor's Theorem

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