wfr - Metamath Proof Explorer

Metamath Proof Explorer

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Syntax Definition wfr 2921

Description: Extend wff notation to include the founded predicate. Read: 'R is a founded relation on A.'

**Hypotheses**
Ref	Expression
cA	class A
cR	class R

**Assertion**
Ref	Expression
wfr	wff R Fr A

See definition df-fr 2923 for more information.

Colors of variables: wff set class