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Syntax Definition wfo 4779
Description: Extend the definition of a wff to include onto functions. (Read: F maps A onto B.) The notation ("onto" below the arrow) is from Definition 6.15(4) of [TakeutiZaring] p. 27.
Ref Expression
cA class A
cB class B
cF class F
Ref Expression
wfo wff F:AontoB

See definition df-fo 4793 for more information.

Colors of variables: wff setvar class
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