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Replaced "regularity" with "extensionality", as it was intended.

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edited Sep 10, 2022 at 0:16

Scott showed that ZF minus the axiom of regularity is interpreted by ZF minus the axioms of regularity and extensionality.

Is Ackermann set theory interpreted by Akermann set theory without regularityextensionality?

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asked Sep 9, 2022 at 23:31

Ackermann set theory without extensionality?

Scott showed that ZF minus the axiom of regularity is interpreted by ZF minus the axioms of regularity and extensionality.

Is Ackermann set theory interpreted by Akermann set theory without regularity?

set-theory lo.logic