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Syntax Definition wcdeq 3289
Description: Extend wff notation to include conditional equality. This is a technical device used in the proof that is the not-free predicate, and that definitions are conservative as a result.
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
vy setvar 𝑦
Assertion
Ref Expression
wcdeq wff CondEq(𝑥 = 𝑦𝜑)

See definition df-cdeq 3290 for more information.

Colors of variables: wff setvar class
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