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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 7834. Forward implication of onsucb 7812. 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 7803 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7807 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 699 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2149 Vcvv 3463 Oncon0 6361 suc csuc 6363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-tr 5223 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-ord 6364 df-on 6365 df-suc 6367 |
| This theorem is referenced by: unon 7826 onsuci 7834 ordunisuc2 7839 ordzsl 7840 onzsl 7841 tfindsg 7856 dfom2 7863 findsg 7893 tfrlem12 8375 oasuc 8508 omsuc 8510 onasuc 8512 oacl 8519 oneo 8565 omeulem1 8566 omeulem2 8567 oeordi 8572 oeworde 8578 oelim2 8580 oelimcl 8585 oeeulem 8586 oeeui 8587 oaabs2 8634 naddsuc2 8687 omxpenlem 9065 card2inf 9516 cantnflt 9640 cantnflem1d 9656 cnfcom 9668 r1ordg 9749 bndrank 9812 r1pw 9816 r1pwALT 9817 tcrank 9855 onssnum 10023 dfac12lem2 10127 cfsuc 10240 cfsmolem 10253 fin1a2lem1 10383 fin1a2lem2 10384 ttukeylem7 10498 alephreg 10566 gch2 10659 winainflem 10677 winalim2 10680 r1wunlim 10721 nqereu 10913 noextend 27795 noresle 27826 nosupno 27832 madeoldsuc 28043 bdayn0p1 28527 constrextdg2lem 34082 fineqvnttrclselem2 35457 nmulprop 36580 ontgval 36830 ontgsucval 36831 onsuctop 36832 sucneqond 37898 onexgt 43858 onexomgt 43859 onexoegt 43862 onepsuc 43870 onsucelab 43881 ordnexbtwnsuc 43885 onsucrn 43889 cantnftermord 43938 cantnfub2 43940 omabs2 43950 onsucunipr 43990 onsucunitp 43991 nadd1suc 44010 naddwordnexlem0 44014 naddwordnexlem1 44015 minregex 44151 onsetreclem2 50368 |
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