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Syntax Definition wcdeq 3310
Description: Extend wff notation to include conditional equality. This is a technical device used in the proof that F/ is the not-free predicate, and that definitions are conservative as a result.
Hypotheses
Ref Expression
wph
vx
vy
Assertion
Ref Expression
wcdeq

See definition df-cdeq 3311 for more information.

Colors of variables: wff setvar class
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