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| Mirrors > Home > MPE Home > Th. List > onsuc | Structured version Visualization version GIF version | ||
| Description: The successor of an ordinal number is an ordinal number. Closed form of onsuci 7854. Forward implication of onsucb 7832. Proposition 7.24 of [TakeutiZaring] p. 41. Remark 1.5 of [Schloeder] p. 1. (Contributed by NM, 6-Jun-1994.) (Proof shortened by BTernaryTau, 30-Nov-2024.) |
| Ref | Expression |
|---|---|
| onsuc | ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sucexg 7823 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7827 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 700 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 Vcvv 3450 Oncon0 6365 suc csuc 6367 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-tr 5212 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6368 df-on 6369 df-suc 6371 |
| This theorem is used by: unon 7846 onsuci 7854 ordunisuc2 7859 ordzsl 7860 onzsl 7861 tfindsg 7876 dfom2 7883 findsg 7913 tfrlem12 8404 oasuc 8539 omsuc 8541 onasuc 8543 oacl 8550 oneo 8596 omeulem1 8597 omeulem2 8598 oeordi 8603 oeworde 8609 oelim2 8611 oelimcl 8616 oeeulem 8617 oeeui 8618 oaabs2 8665 naddsuc2 8718 omxpenlem 9104 card2inf 9556 cantnflt 9680 cantnflem1d 9696 cnfcom 9708 r1ordg 9792 bndrank 9861 r1pw 9866 r1pwALT 9867 tcrank 9908 onssnum 10126 dfac12lem2 10230 cfsuc 10342 cfsmolem 10355 fin1a2lem1 10485 fin1a2lem2 10486 ttukeylem7 10600 alephreg 10674 gch2 10767 winainflem 10785 winalim2 10788 r1wunlim 10829 nqereu 11021 noextend 28032 noresle 28063 nosupno 28069 madeoldsuc 28280 bdayn0p1 28764 constrextdg2lem 34430 fineqvnttrclselem2 35850 j0ltalephlem 35950 j0ltaleph 35951 nmulprop 37035 ontgval 37315 ontgsucval 37316 onsuctop 37317 sucneqond 38397 onexgt 44351 onexomgt 44352 onexoegt 44355 onepsuc 44363 onsucelab 44374 ordnexbtwnsuc 44378 onsucrn 44382 cantnftermord 44431 cantnfub2 44433 omabs2 44443 onsucunipr 44483 onsucunitp 44484 nadd1suc 44503 naddwordnexlem0 44507 naddwordnexlem1 44508 minregex 44644 onsetreclem2 50982 |
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