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Syntax Definition wf 5409
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 5417 for more information.

Colors of variables: wff set class
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