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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 7848. Forward implication of onsucb 7826. 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 7817 | . 2 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ V) | |
| 2 | sucexeloni 7821 | . 2 ⊢ ((𝐴 ∈ On ∧ suc 𝐴 ∈ V) → suc 𝐴 ∈ On) | |
| 3 | 1, 2 | mpdan 700 | 1 ⊢ (𝐴 ∈ On → suc 𝐴 ∈ On) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 Vcvv 3451 Oncon0 6361 suc csuc 6363 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-pr 5391 ax-un 7749 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-tr 5213 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6364 df-on 6365 df-suc 6367 |
| This theorem is used by: unon 7840 onsuci 7848 ordunisuc2 7853 ordzsl 7854 onzsl 7855 tfindsg 7870 dfom2 7877 findsg 7907 tfrlem12 8390 oasuc 8525 omsuc 8527 onasuc 8529 oacl 8536 oneo 8582 omeulem1 8583 omeulem2 8584 oeordi 8589 oeworde 8595 oelim2 8597 oelimcl 8602 oeeulem 8603 oeeui 8604 oaabs2 8651 naddsuc2 8704 omxpenlem 9090 card2inf 9542 cantnflt 9666 cantnflem1d 9682 cnfcom 9694 r1ordg 9778 bndrank 9847 r1pw 9852 r1pwALT 9853 tcrank 9894 onssnum 10112 dfac12lem2 10216 cfsuc 10328 cfsmolem 10341 fin1a2lem1 10471 fin1a2lem2 10472 ttukeylem7 10586 alephreg 10660 gch2 10753 winainflem 10771 winalim2 10774 r1wunlim 10815 nqereu 11007 noextend 28016 noresle 28047 nosupno 28053 madeoldsuc 28264 bdayn0p1 28748 constrextdg2lem 34373 fineqvnttrclselem2 35773 nmulprop 36919 ontgval 37199 ontgsucval 37200 onsuctop 37201 sucneqond 38268 onexgt 44226 onexomgt 44227 onexoegt 44230 onepsuc 44238 onsucelab 44249 ordnexbtwnsuc 44253 onsucrn 44257 cantnftermord 44306 cantnfub2 44308 omabs2 44318 onsucunipr 44358 onsucunitp 44359 nadd1suc 44378 naddwordnexlem0 44382 naddwordnexlem1 44383 minregex 44519 onsetreclem2 50768 |
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