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Related theorems GIF version |
| Description: A natural number is an ordinal number. |
| Ref | Expression |
|---|---|
| nnont | ⊢ (A ∈ ω → A ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omsson 2377 | . 2 ⊢ ω ⊆ On | |
| 2 | 1 | sseli 1504 | 1 ⊢ (A ∈ ω → A ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∈ wcel 1092 Oncon0 2199 ωcom 2372 |
| This theorem is referenced by: nnon 2380 nnord 2381 omssnlim 2386 peano4 2393 findsg 2398 frsuc 2991 nna0 3166 nnm0 3167 nnasuc 3168 nnmsuc 3169 nna0r 3170 nnm0r 3171 nnacom 3175 nnaordi 3176 nnaord 3177 nnaass 3179 nndi 3180 nnacan 3184 nnaword 3185 nnaword1 3186 nnmordi 3188 nnaordex 3191 nnawordex 3192 cardnn 3631 pion 3801 mulidpi 3808 uzrdgsuc 4659 |
| 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 |