| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Extend the definition of
a class to include the composition of two
classes. (Read: The composition of |
| Ref | Expression |
|---|---|
| cA |
|
| cB |
|
| Ref | Expression |
|---|---|
| ccom |
|
| Colors of variables: wff set class |