cun - Metamath Proof Explorer

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

Syntax Definition cun 3882

Description: Extend class notation to include union of two classes (read: "𝐴 union 𝐵").

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

**Assertion**
Ref	Expression
cun	class (𝐴 ∪ 𝐵)

See definition df-un 3889 for more information.

Colors of variables: wff setvar class