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Syntax Definition caiota 43635
Description: Extend class notation with an alternative for Russell's definition of a description binder (inverted iota).
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
Assertion
Ref Expression
caiota class (℩'𝑥𝜑)

See definition df-aiota 43637 for more information.

Colors of variables: wff setvar class
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