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Syntax Definition wer 6134
Description: Extend the definition of a wff to include the equivalence predicate.
Hypotheses
Ref Expression
cA class 𝐴
cR class 𝑅
Assertion
Ref Expression
wer wff 𝑅 Er 𝐴

See definition df-er 6137 for more information.

Colors of variables: wff set class
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