Syntax Definition wf1 4899

Description: Extend the definition of a wff to include one-to-one functions. (Read: 𝐹 maps 𝐴 one-to-one into 𝐵.) The notation ("1-1" above the arrow) is from Definition 6.15(5) of [TakeutiZaring] p. 27.

Hypotheses

Ref	Expression
cA	class 𝐴
cB	class 𝐵
cF	class 𝐹

Assertion

Ref	Expression
wf1	wff 𝐹:𝐴–1-1→𝐵

See definition df-f1 4907 for more information.