Syntax Definition cif 3663

Description: Extend class notation to include the conditional operator. See df-if 3664 for a description. (In older databases this was denoted "ded".)

Hypotheses

Ref	Expression
wph	wff φ
cA	class A
cB	class B

Assertion

Ref	Expression
cif	class if(φ, A, B)

See definition df-if 3664 for more information.