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Syntax Definition wfo 5788
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:𝐴onto𝐵

See definition df-fo 5796 for more information.

Colors of variables: wff setvar class
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