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| Mirrors > Home > ILE Home > Th. List > ord3 | Unicode version | ||
| Description: Ordinal 3 is an ordinal class. (Contributed by BTernaryTau, 6-Jan-2025.) |
| Ref | Expression |
|---|---|
| ord3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3on 6598 |
. 2
| |
| 2 | 1 | onordi 4525 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-nul 4216 ax-pow 4266 ax-pr 4301 ax-un 4532 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-v 2803 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-nul 3494 df-pw 3655 df-sn 3676 df-pr 3677 df-uni 3895 df-tr 4189 df-iord 4465 df-on 4467 df-suc 4470 df-1o 6587 df-2o 6588 df-3o 6589 |
| This theorem is referenced by: (None) |
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