Syntax Definition wfo 3261

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.

Hypotheses

Ref	Expression
cA	class A
cB	class B
cF	class F

Assertion

Ref	Expression
wfo	wff F:A–onto→B

See definition df-fo 3277 for more information.

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