Axiom of Empty Set

In axiomatic set theory, the axiom of empty set is an axiom of Kripke–Platek set theory and the variant of general set theory that Burgess (2005) calls "ST," and a demonstrable truth in Zermelo set theory and Zermelo–Fraenkel set theory, with or without the axiom of choice.

Read more about Axiom Of Empty Set:  Formal Statement, Interpretation

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    It is a great mistake to suppose that clever, imaginative children ... should content themselves with the empty nonsense which is so often set before them under the name of Children’s Tales. They want something much better; and it is surprising how much they see and appreciate which escapes a good, honest, well- informed papa.
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