Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > c1st | Structured version Visualization version GIF version |
Description: Extend the definition of a class to include the first member an ordered pair function. |
Ref | Expression |
---|---|
c1st | class 1st |
Colors of variables: wff setvar class |
Copyright terms: Public domain | W3C validator |