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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 7791. Forward implication of onsucb 7769. 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 7760 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7764 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 688 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 Vcvv 3442 Oncon0 6325 suc csuc 6327 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-ord 6328 df-on 6329 df-suc 6331 |
| This theorem is referenced by: unon 7783 onsuci 7791 ordunisuc2 7796 ordzsl 7797 onzsl 7798 tfindsg 7813 dfom2 7820 findsg 7849 tfrlem12 8330 oasuc 8461 omsuc 8463 onasuc 8465 oacl 8472 oneo 8518 omeulem1 8519 omeulem2 8520 oeordi 8525 oeworde 8531 oelim2 8533 oelimcl 8538 oeeulem 8539 oeeui 8540 oaabs2 8587 naddsuc2 8639 omxpenlem 9018 card2inf 9472 cantnflt 9593 cantnflem1d 9609 cnfcom 9621 r1ordg 9702 bndrank 9765 r1pw 9769 r1pwALT 9770 tcrank 9808 onssnum 9962 dfac12lem2 10067 cfsuc 10179 cfsmolem 10192 fin1a2lem1 10322 fin1a2lem2 10323 ttukeylem7 10437 alephreg 10505 gch2 10598 winainflem 10616 winalim2 10619 r1wunlim 10660 nqereu 10852 noextend 27646 noresle 27677 nosupno 27683 madeoldsuc 27893 bdayn0p1 28377 constrextdg2lem 33926 fineqvnttrclselem2 35300 ontgval 36647 ontgsucval 36648 onsuctop 36649 sucneqond 37620 onexgt 43597 onexomgt 43598 onexoegt 43601 onepsuc 43609 onsucelab 43620 ordnexbtwnsuc 43624 onsucrn 43628 cantnftermord 43677 cantnfub2 43679 omabs2 43689 onsucunipr 43729 onsucunitp 43730 nadd1suc 43749 naddwordnexlem0 43753 naddwordnexlem1 43754 minregex 43890 onsetreclem2 50065 |
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