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| Description: A natural number is an ordinal number. |
| Ref | Expression |
|---|---|
| nnont |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omsson 3136 |
. 2
| |
| 2 | 1 | sseli 2065 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: nnon 3139 nnord 3140 omssnlim 3145 peano4 3152 findsg 3157 frsuct 3953 nna0 4223 nnm0 4224 nnasuc 4225 nnmsuc 4226 nna0r 4227 nnm0r 4228 nnecl 4231 nnacom 4233 nnaordi 4234 nnaord 4235 nnaass 4237 nndi 4238 nnmass 4239 nnacan 4242 nnaword 4243 nnaword1 4244 nnmordi 4246 nnmord 4247 nnmcan 4248 nnaordex 4249 nnawordex 4250 oaabslem 4251 oaabs 4252 nneob 4255 cardnn 4824 pion 5007 mulidpi 5014 om2uzlt2 6299 uzrdgsuc 6304 findreccl 10417 |
| 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 |