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Related theorems Unicode version |
| Description: A natural number is ordinal. |
| Ref | Expression |
|---|---|
| nnord |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnont 3133 |
. 2
| |
| 2 | eloni 2953 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordom 3136 nnlim 3139 nnsuc 3143 omsmo 4247 phplem1 4494 phplem2 4495 phplem3 4496 phplem4 4497 php 4499 php4 4502 nndomo 4506 omsucdom 4508 ominf 4514 pssnn 4519 unblem1 4523 isfinite2 4529 unfilem1 4530 fodomfi 4546 inf3lem5 4597 inf3lem6 4598 elni2 4985 piord 4988 addnidpi 5008 indpi 5014 om2uzf1o 6246 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-12 966 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 979 df-sb 1170 df-clab 1462 df-cleq 1467 df-clel 1470 df-ral 1646 df-rex 1647 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-tr 2676 df-po 2835 df-so 2845 df-fr 2912 df-we 2929 df-ord 2946 df-on 2947 df-om 3127 |