Syntax Definition wf1 4842

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 4850 for more information.