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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 7822. Forward implication of onsucb 7800. 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 686 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2107 Vcvv 3475 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 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-ext 2704 ax-sep 5298 ax-nul 5305 ax-pr 5426 ax-un 7720 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-sb 2069 df-clab 2711 df-cleq 2725 df-clel 2811 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3434 df-v 3477 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-br 5148 df-opab 5210 df-tr 5265 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-ord 6364 df-on 6365 df-suc 6367 |
This theorem is referenced by: ordsucOLD 7797 unon 7814 onsuci 7822 ordunisuc2 7828 ordzsl 7829 onzsl 7830 tfindsg 7845 dfom2 7852 findsg 7885 tfrlem12 8384 oasuc 8519 omsuc 8521 onasuc 8523 oacl 8530 oneo 8577 omeulem1 8578 omeulem2 8579 oeordi 8583 oeworde 8589 oelim2 8591 oelimcl 8596 oeeulem 8597 oeeui 8598 oaabs2 8644 omxpenlem 9069 card2inf 9546 cantnflt 9663 cantnflem1d 9679 cnfcom 9691 r1ordg 9769 bndrank 9832 r1pw 9836 r1pwALT 9837 tcrank 9875 onssnum 10031 dfac12lem2 10135 cfsuc 10248 cfsmolem 10261 fin1a2lem1 10391 fin1a2lem2 10392 ttukeylem7 10506 alephreg 10573 gch2 10666 winainflem 10684 winalim2 10687 r1wunlim 10728 nqereu 10920 noextend 27149 noresle 27180 nosupno 27186 madeoldsuc 27359 ontgval 35254 ontgsucval 35255 onsuctop 35256 sucneqond 36184 onexgt 41922 onexomgt 41923 onexoegt 41926 onepsuc 41934 onsucelab 41946 ordnexbtwnsuc 41950 onsucrn 41954 cantnftermord 42003 cantnfub2 42005 omabs2 42015 onsucunipr 42055 onsucunitp 42056 nadd1suc 42075 naddsuc2 42076 naddwordnexlem0 42080 naddwordnexlem1 42081 minregex 42218 onsetreclem2 47653 |
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