cuni - Metamath Proof Explorer

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Syntax Definition cuni 4840

Description: Extend class notation to include the union of a class. Read: "union (of) 𝐴".

**Hypothesis**
Ref	Expression
cA	class 𝐴

**Assertion**
Ref	Expression
cuni	class ∪ 𝐴

See definition df-uni 4841 for more information.

Colors of variables: wff setvar class