Abraham Fraenkel was a mathematician who worked on set theory and foundations. He is responsible for the âFâ in ZFC, but also did work using ZFA.

Among other things, he also introduced the basic and second Fraenkel models, early examples of forcing using what is now known as a permutation model.

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Last revised on November 19, 2012 at 07:44:20. See the history of this page for a list of all contributions to it.