| Metamath Proof Explorer |
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Related theorems GIF version |
| Description: Extend wff notation to include the strict ordering predicate. Read: 'R orders A.' |
| Ref | Expression |
|---|---|
| cA | class A |
| cR | class R |
| Ref | Expression |
|---|---|
| wor | wff R Or A |
| Colors of variables: wff set class |