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Mirrors > Home > MPE Home > Th. List > df-3o | Structured version Visualization version GIF version |
Description: Define the ordinal number 3. (Contributed by Mario Carneiro, 14-Jul-2013.) |
Ref | Expression |
---|---|
df-3o | ⊢ 3o = suc 2o |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c3o 8086 | . 2 class 3o | |
2 | c2o 8085 | . . 3 class 2o | |
3 | 2 | csuc 6186 | . 2 class suc 2o |
4 | 1, 3 | wceq 1528 | 1 wff 3o = suc 2o |
Colors of variables: wff setvar class |
This definition is referenced by: 3on 8103 o2p2e4 8155 o2p2e4OLD 8156 3onn 8256 en3 8743 hash3 13755 finxp3o 34563 tr3dom 39772 df3o2 40252 df3o3 40253 clsk1independent 40274 |
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