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| Mirrors > Home > ILE Home > Th. List > nnord | GIF version | ||
| Description: A natural number is ordinal. (Contributed by NM, 17-Oct-1995.) |
| Ref | Expression |
|---|---|
| nnord | ⊢ (𝐴 ∈ ω → Ord 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnon 4731 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 4495 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝐴 ∈ ω → Ord 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 Ord word 4482 Oncon0 4483 ωcom 4711 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-iinf 4709 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2814 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-pw 3670 df-sn 3694 df-pr 3695 df-uni 3914 df-int 3949 df-tr 4208 df-iord 4486 df-on 4488 df-suc 4491 df-iom 4712 |
| This theorem is referenced by: nnsucsssuc 6724 nnsucuniel 6727 nntri1 6728 nnsseleq 6733 nntr2 6735 phplem1 7105 phplem2 7106 phplem3 7107 phplem4 7108 phplem4dom 7115 nndomo 7117 1ndom2 7118 dif1en 7135 nnwetri 7175 unsnfi 7178 ctmlemr 7398 nnnninf 7416 nnnninfeq 7418 nnnninfeq2 7419 nninfisol 7423 piord 7625 addnidpig 7650 archnqq 7731 frecfzennn 10787 hashp1i 11173 ennnfonelemk 13143 ennnfonelemg 13146 ennnfonelemhf1o 13156 ennnfonelemhom 13158 ctinfom 13171 3dom 16754 nnsf 16775 peano4nninf 16776 nninfsellemeq 16784 nnnninfex 16792 |
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