| Metamath Proof Explorer |
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Related theorems GIF version |
| Description: Extend the definition of a class to include the image of a class. (Read: The image of B under A.) |
| Ref | Expression |
|---|---|
| cA | class A |
| cB | class B |
| Ref | Expression |
|---|---|
| cima | class (A “ B) |
| Colors of variables: wff set class |