| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: Extend the definition of
a wff to include the isomorphism property.
(Read: |
| Ref | Expression |
|---|---|
| cA |
|
| cB |
|
| cR |
|
| cS |
|
| cH |
|
| Ref | Expression |
|---|---|
| wiso |
|
| Colors of variables: wff set class |