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.)

Hypotheses

Ref	Expression
cA	class A
cB	class B
cF	class F

Assertion

Ref	Expression
wf	wff F:A–→B

See definition df-f 4791 for more information.