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Related theorems Unicode version |
| Description: A natural number is ordinal. |
| Ref | Expression |
|---|---|
| nnord |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnont 3138 |
. 2
| |
| 2 | eloni 2958 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordom 3141 nnlim 3144 nnsuc 3148 omsmo 4257 phplem1 4508 phplem2 4509 phplem3 4510 phplem4 4511 php 4513 php4 4517 nndomo 4521 omsucdom 4523 ominfOLD 4529 pssnn 4534 unblem1 4540 isfinite2OLD 4546 unfilem1 4548 fodomfiOLD 4566 inf3lem5 4617 inf3lem6 4618 elni2 5005 piord 5008 addnidpi 5028 indpi 5034 om2uzf1o 6301 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 777 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-ral 1649 df-rex 1650 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-br 2620 df-tr 2681 df-po 2840 df-so 2850 df-fr 2917 df-we 2934 df-ord 2951 df-on 2952 df-om 3132 |