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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 7819. Forward implication of onsucb 7797. 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 7788 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7792 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 697 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2142 Vcvv 3454 Oncon0 6346 suc csuc 6348 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5246 ax-pr 5390 ax-un 7718 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-ord 6349 df-on 6350 df-suc 6352 |
| This theorem is referenced by: unon 7811 onsuci 7819 ordunisuc2 7824 ordzsl 7825 onzsl 7826 tfindsg 7841 dfom2 7848 findsg 7878 tfrlem12 8360 oasuc 8493 omsuc 8495 onasuc 8497 oacl 8504 oneo 8550 omeulem1 8551 omeulem2 8552 oeordi 8557 oeworde 8563 oelim2 8565 oelimcl 8570 oeeulem 8571 oeeui 8572 oaabs2 8619 naddsuc2 8672 omxpenlem 9050 card2inf 9503 cantnflt 9627 cantnflem1d 9643 cnfcom 9655 r1ordg 9736 bndrank 9799 r1pw 9803 r1pwALT 9804 tcrank 9842 onssnum 9996 dfac12lem2 10101 cfsuc 10214 cfsmolem 10227 fin1a2lem1 10357 fin1a2lem2 10358 ttukeylem7 10472 alephreg 10540 gch2 10633 winainflem 10651 winalim2 10654 r1wunlim 10695 nqereu 10887 noextend 27727 noresle 27758 nosupno 27764 madeoldsuc 27975 bdayn0p1 28459 constrextdg2lem 34042 fineqvnttrclselem2 35415 nmulprop 36537 ontgval 36788 ontgsucval 36789 onsuctop 36790 sucneqond 37856 onexgt 43814 onexomgt 43815 onexoegt 43818 onepsuc 43826 onsucelab 43837 ordnexbtwnsuc 43841 onsucrn 43845 cantnftermord 43894 cantnfub2 43896 omabs2 43906 onsucunipr 43946 onsucunitp 43947 nadd1suc 43966 naddwordnexlem0 43970 naddwordnexlem1 43971 minregex 44107 onsetreclem2 50324 |
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