| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: Extend class notation to include power class. (The tilde in the Metamath token is meant to suggest the calligraphic font of the P.) |
| Ref | Expression |
|---|---|
| cA |
|
| Ref | Expression |
|---|---|
| cpw |
|
| Colors of variables: wff set class |