wfn - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > wfn		Structured version Visualization version GIF version

Syntax Definition wfn 6556

Description: Extend the definition of a wff to include the function predicate with a domain. (Read: 𝐴 is a function on 𝐵.)

**Hypotheses**
Ref	Expression
cA	class 𝐴
cB	class 𝐵

**Assertion**
Ref	Expression
wfn	wff 𝐴 Fn 𝐵

See definition df-fn 6564 for more information.

Colors of variables: wff setvar class