| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: A natural number is ordinal. |
| Ref | Expression |
|---|---|
| nnord |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnont 2379 |
. 2
| |
| 2 | eloni 2209 |
. 2
| |
| 3 | 1, 2 | syl 12 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordom 2382 nnlim 2385 nnsuc 2389 nnmordi 3188 nnmord 3189 nnmcan 3190 omsmo 3196 phplem2 3404 phplem3 3405 phplem4 3406 phplem5 3407 php 3409 php4 3412 nndomo 3416 omsucdom 3418 ominf 3423 pssnn 3428 unblem1 3431 isfinite2 3437 unfilem1 3438 inf3lem5 3468 inf3lem6 3469 elni2 3799 piord 3802 addnidpi 3822 indpi 3828 om2uzf1o 4656 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-16 922 ax-17 925 ax-ext 1074 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3an 583 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-tr 2042 df-br 2063 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-om 2373 |