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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 4714 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 4478 | . 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 2202 Ord word 4465 Oncon0 4466 ωcom 4694 |
| 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 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-iinf 4692 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-pw 3658 df-sn 3679 df-pr 3680 df-uni 3899 df-int 3934 df-tr 4193 df-iord 4469 df-on 4471 df-suc 4474 df-iom 4695 |
| This theorem is referenced by: nnsucsssuc 6703 nnsucuniel 6706 nntri1 6707 nnsseleq 6712 nntr2 6714 phplem1 7081 phplem2 7082 phplem3 7083 phplem4 7084 phplem4dom 7091 nndomo 7093 1ndom2 7094 dif1en 7111 nnwetri 7151 unsnfi 7154 ctmlemr 7367 nnnninf 7385 nnnninfeq 7387 nnnninfeq2 7388 nninfisol 7392 piord 7591 addnidpig 7616 archnqq 7697 frecfzennn 10751 hashp1i 11137 ennnfonelemk 13101 ennnfonelemg 13104 ennnfonelemhf1o 13114 ennnfonelemhom 13116 ctinfom 13129 3dom 16708 nnsf 16731 peano4nninf 16732 nninfsellemeq 16740 nnnninfex 16748 |
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