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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 7790. Forward implication of onsucb 7768. 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 7759 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7763 | . 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 3429 Oncon0 6323 suc csuc 6325 |
| 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 2708 ax-sep 5231 ax-pr 5375 ax-un 7689 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-tr 5193 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-ord 6326 df-on 6327 df-suc 6329 |
| This theorem is referenced by: unon 7782 onsuci 7790 ordunisuc2 7795 ordzsl 7796 onzsl 7797 tfindsg 7812 dfom2 7819 findsg 7848 tfrlem12 8328 oasuc 8459 omsuc 8461 onasuc 8463 oacl 8470 oneo 8516 omeulem1 8517 omeulem2 8518 oeordi 8523 oeworde 8529 oelim2 8531 oelimcl 8536 oeeulem 8537 oeeui 8538 oaabs2 8585 naddsuc2 8637 omxpenlem 9016 card2inf 9470 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 27630 noresle 27661 nosupno 27667 madeoldsuc 27877 bdayn0p1 28361 constrextdg2lem 33892 fineqvnttrclselem2 35266 ontgval 36613 ontgsucval 36614 onsuctop 36615 sucneqond 37681 onexgt 43668 onexomgt 43669 onexoegt 43672 onepsuc 43680 onsucelab 43691 ordnexbtwnsuc 43695 onsucrn 43699 cantnftermord 43748 cantnfub2 43750 omabs2 43760 onsucunipr 43800 onsucunitp 43801 nadd1suc 43820 naddwordnexlem0 43824 naddwordnexlem1 43825 minregex 43961 onsetreclem2 50181 |
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