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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 7779. Forward implication of onsucb 7757. 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 7748 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7752 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 693 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2119 Vcvv 3431 Oncon0 6310 suc csuc 6312 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-tr 5180 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-ord 6313 df-on 6314 df-suc 6316 |
| This theorem is referenced by: unon 7771 onsuci 7779 ordunisuc2 7784 ordzsl 7785 onzsl 7786 tfindsg 7801 dfom2 7808 findsg 7837 tfrlem12 8318 oasuc 8449 omsuc 8451 onasuc 8453 oacl 8460 oneo 8506 omeulem1 8507 omeulem2 8508 oeordi 8513 oeworde 8519 oelim2 8521 oelimcl 8526 oeeulem 8527 oeeui 8528 oaabs2 8575 naddsuc2 8627 omxpenlem 9006 card2inf 9460 cantnflt 9584 cantnflem1d 9600 cnfcom 9612 r1ordg 9693 bndrank 9756 r1pw 9760 r1pwALT 9761 tcrank 9799 onssnum 9953 dfac12lem2 10058 cfsuc 10170 cfsmolem 10183 fin1a2lem1 10313 fin1a2lem2 10314 ttukeylem7 10428 alephreg 10496 gch2 10589 winainflem 10607 winalim2 10610 r1wunlim 10651 nqereu 10843 noextend 27648 noresle 27679 nosupno 27685 madeoldsuc 27895 bdayn0p1 28379 constrextdg2lem 33932 fineqvnttrclselem2 35303 ontgval 36659 ontgsucval 36660 onsuctop 36661 sucneqond 37727 onexgt 43685 onexomgt 43686 onexoegt 43689 onepsuc 43697 onsucelab 43708 ordnexbtwnsuc 43712 onsucrn 43716 cantnftermord 43765 cantnfub2 43767 omabs2 43777 onsucunipr 43817 onsucunitp 43818 nadd1suc 43837 naddwordnexlem0 43841 naddwordnexlem1 43842 minregex 43978 onsetreclem2 50196 |
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