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| Description: A natural number is an ordinal number. |
| Ref | Expression |
|---|---|
| nnont |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omsson 3131 |
. 2
| |
| 2 | 1 | sseli 2061 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: nnon 3134 nnord 3135 omssnlim 3140 peano4 3147 findsg 3152 frsuct 3944 nna0 4213 nnm0 4214 nnasuc 4215 nnmsuc 4216 nna0r 4217 nnm0r 4218 nnecl 4221 nnacom 4223 nnaordi 4224 nnaord 4225 nnaass 4227 nndi 4228 nnmass 4229 nnacan 4232 nnaword 4233 nnaword1 4234 nnmordi 4236 nnmord 4237 nnmcan 4238 nnaordex 4239 nnawordex 4240 oaabslem 4241 oaabs 4242 nneob 4245 cardnn 4804 pion 4987 mulidpi 4994 om2uzlt2 6244 uzrdgsuc 6249 findreccl 10351 |
| 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 |