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Syntax Definition cdju 9657
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 (𝐴𝐵)

See definition df-dju 9660 for more information.

Colors of variables: wff setvar class
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