cuni1 - New Foundations Explorer

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Syntax Definition cuni1 4133

Description: Extend class notation to include the unit union of a class (read: 'unit union A')

**Hypothesis**
Ref	Expression
cA	class A

**Assertion**
Ref	Expression
cuni1	class ⋃₁A

See definition df-uni1 4138 for more information.

Colors of variables: wff setvar class