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Syntax Definition cif 3941
Description: Extend class notation to include the conditional operator. See df-if 3942 for a description. (In older databases this was denoted "ded".)
Hypotheses
Ref Expression
wph
cA
cB
Assertion
Ref Expression
cif

See definition df-if 3942 for more information.

Colors of variables: wff setvar class
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