cun - Metamath Proof Explorer

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Syntax Definition cun 4152

Description: Syntax for the union of two classes.

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

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

See definition df-un 4154 for more information.

Colors of variables: wff setvar class