cdju - Metamath Proof Explorer

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Syntax Definition cdju 9656

Description: Extend class notation to include disjoint union of two classes.

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

**Assertion**
Ref	Expression
cdju	class (𝐴 ⊔ 𝐵)

See definition df-dju 9659 for more information.

Colors of variables: wff setvar class