c9 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > c9		Structured version Visualization version GIF version

Syntax Definition c9 12328

Description: Extend class notation to include the number 9.

**Assertion**
Ref	Expression
c9	class 9

See definition df-9 12336 for more information.

Colors of variables: wff setvar class