| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Define the number 5. |
| Ref | Expression |
|---|---|
| df-5 | ⊢ 5 = (4 + 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c5 4457 | . 2 class 5 | |
| 2 | c4 4456 | . . 3 class 4 | |
| 3 | c1 4029 | . . 3 class 1 | |
| 4 | caddc 4031 | . . 3 class + | |
| 5 | 2, 3, 4 | co 3001 | . 2 class (4 + 1) |
| 6 | 1, 5 | wceq 1091 | 1 wff 5 = (4 + 1) |
| Colors of variables: wff set class |
| This definition is referenced by: 5re 4474 5pos 4482 3p2e5 4492 4p2e6 4494 |