wnfc - Metamath Proof Explorer

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

Syntax Definition wnfc 2890

Description: Extend wff definition to include the not-free predicate for classes.

**Hypotheses**
Ref	Expression
vx	setvar 𝑥
cA	class 𝐴

**Assertion**
Ref	Expression
wnfc	wff Ⅎ𝑥𝐴

See definition df-nfc 2892 for more information.

Colors of variables: wff setvar class