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| Description: A natural number is an ordinal. Constructive proof of nnon 4665. Can also be proved from bj-omssonALT 16033. (Contributed by BJ, 27-Oct-2020.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-nnelon |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bj-nnord 16028 |
. 2
| |
| 2 | elong 4427 |
. 2
| |
| 3 | 1, 2 | mpbird 167 |
1
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| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-nul 4177 ax-pr 4260 ax-un 4487 ax-bd0 15883 ax-bdor 15886 ax-bdal 15888 ax-bdex 15889 ax-bdeq 15890 ax-bdel 15891 ax-bdsb 15892 ax-bdsep 15954 ax-infvn 16011 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-rex 2491 df-rab 2494 df-v 2775 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-nul 3465 df-sn 3643 df-pr 3644 df-uni 3856 df-int 3891 df-tr 4150 df-iord 4420 df-on 4422 df-suc 4425 df-iom 4646 df-bdc 15911 df-bj-ind 15997 |
| This theorem is referenced by: bj-omsson 16032 |
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