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Mirrors > Home > ILE Home > Th. List > onsuci | GIF version |
Description: The successor of an ordinal number is an ordinal number. Corollary 7N(c) of [Enderton] p. 193. (Contributed by NM, 12-Jun-1994.) |
Ref | Expression |
---|---|
onssi.1 | ⊢ 𝐴 ∈ On |
Ref | Expression |
---|---|
onsuci | ⊢ suc 𝐴 ∈ On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | onssi.1 | . 2 ⊢ 𝐴 ∈ On | |
2 | suceloni 4478 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ suc 𝐴 ∈ On |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2136 Oncon0 4341 suc csuc 4343 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 |
This theorem depends on definitions: df-bi 116 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-uni 3790 df-tr 4081 df-iord 4344 df-on 4346 df-suc 4349 |
This theorem is referenced by: ordtri2orexmid 4500 onsucsssucexmid 4504 ordsoexmid 4539 ordtri2or2exmid 4548 ontri2orexmidim 4549 tfr0dm 6290 1on 6391 2on 6393 3on 6395 4on 6396 onntri35 7193 onntri45 7197 prarloclemarch2 7360 |
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