![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > piord | GIF version |
Description: A positive integer is ordinal. (Contributed by NM, 29-Jan-1996.) |
Ref | Expression |
---|---|
piord | ⊢ (𝐴 ∈ N → Ord 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pinn 7369 | . 2 ⊢ (𝐴 ∈ N → 𝐴 ∈ ω) | |
2 | nnord 4644 | . 2 ⊢ (𝐴 ∈ ω → Ord 𝐴) | |
3 | 1, 2 | syl 14 | 1 ⊢ (𝐴 ∈ N → Ord 𝐴) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 2164 Ord word 4393 ωcom 4622 Ncnpi 7332 |
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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4147 ax-nul 4155 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-iinf 4620 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-v 2762 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-nul 3447 df-pw 3603 df-sn 3624 df-pr 3625 df-uni 3836 df-int 3871 df-tr 4128 df-iord 4397 df-on 4399 df-suc 4402 df-iom 4623 df-ni 7364 |
This theorem is referenced by: prarloclemn 7559 |
Copyright terms: Public domain | W3C validator |