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Related theorems Unicode version |
| Description: A natural number is ordinal. |
| Ref | Expression |
|---|---|
| nnord |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnont 3128 |
. 2
| |
| 2 | eloni 2948 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordom 3131 nnlim 3134 nnsuc 3138 omsmo 4241 phplem1 4488 phplem2 4489 phplem3 4490 phplem4 4491 php 4493 php4 4496 nndomo 4500 omsucdom 4502 ominf 4508 pssnn 4513 unblem1 4517 isfinite2 4523 unfilem1 4524 fodomfi 4540 inf3lem5 4589 inf3lem6 4590 elni2 4977 piord 4980 addnidpi 5000 indpi 5006 om2uzf1o 6238 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-12 965 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 775 df-ex 978 df-sb 1168 df-clab 1457 df-cleq 1462 df-clel 1465 df-ral 1641 df-rex 1642 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-sn 2402 df-pr 2403 df-op 2406 df-uni 2494 df-br 2610 df-tr 2671 df-po 2831 df-so 2841 df-fr 2907 df-we 2924 df-ord 2941 df-on 2942 df-om 3122 |