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Mirrors > Home > ILE Home > Th. List > df2o3 | Unicode version |
Description: Expanded value of the ordinal number 2. (Contributed by Mario Carneiro, 14-Aug-2015.) |
Ref | Expression |
---|---|
df2o3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2o 6322 | . 2 | |
2 | df-suc 4301 | . 2 | |
3 | df1o2 6334 | . . . 4 | |
4 | 3 | uneq1i 3231 | . . 3 |
5 | df-pr 3539 | . . 3 | |
6 | 4, 5 | eqtr4i 2164 | . 2 |
7 | 1, 2, 6 | 3eqtri 2165 | 1 |
Colors of variables: wff set class |
Syntax hints: wceq 1332 cun 3074 c0 3368 csn 3532 cpr 3533 csuc 4295 c1o 6314 c2o 6315 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 df-dif 3078 df-un 3080 df-nul 3369 df-pr 3539 df-suc 4301 df-1o 6321 df-2o 6322 |
This theorem is referenced by: df2o2 6336 2oconcl 6344 0lt2o 6346 1lt2o 6347 en2eqpr 6809 finomni 7020 exmidomniim 7021 exmidomni 7022 ismkvnex 7037 exmidfodomrlemr 7075 exmidfodomrlemrALT 7076 xp2dju 7088 unct 11991 el2oss1o 13359 2o01f 13364 nninfalllem1 13378 nninfall 13379 nninfsellemqall 13386 nninfomnilem 13389 |
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