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Syntax Definition wf 4777
Description: Extend the definition of a wff to include the function predicate with domain and codomain. (Read: F maps A into B.)
Ref Expression
cA class A
cB class B
cF class F
Ref Expression
wf wff F:A–→B

See definition df-f 4791 for more information.

Colors of variables: wff setvar class
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