Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > df-4o | Structured version Visualization version GIF version |
Description: Define the ordinal number 4. (Contributed by Mario Carneiro, 14-Jul-2013.) |
Ref | Expression |
---|---|
df-4o | ⊢ 4o = suc 3o |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c4o 8087 | . 2 class 4o | |
2 | c3o 8086 | . . 3 class 3o | |
3 | 2 | csuc 6186 | . 2 class suc 3o |
4 | 1, 3 | wceq 1528 | 1 wff 4o = suc 3o |
Colors of variables: wff setvar class |
This definition is referenced by: 4on 8104 o2p2e4 8155 o2p2e4OLD 8156 4onn 8257 en4 8744 hash4 13756 |
Copyright terms: Public domain | W3C validator |