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| Mirrors > Home > MPE Home > Th. List > df-3o | Structured version Visualization version Unicode version | ||
| Description: Define the ordinal number 3. (Contributed by Mario Carneiro, 14-Jul-2013.) |
| Ref | Expression |
|---|---|
| df-3o |
     |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c3o 7555 |
. 2
 | |
| 2 | c2o 7554 |
. . 3
| |
| 3 | 2 | csuc 5725 |
. 2
|
| 4 | 1, 3 | wceq 1483 |
1
 |
| Colors of variables: wff setvar class |
| This definition is referenced by: 3on 7570 o2p2e4 7621 3onn 7721 en3 8197 hash3 13194 finxp3o 33237 df3o2 38322 df3o3 38323 clsk1independent 38344 |
| Copyright terms: Public domain | W3C validator |