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| Description: The successor of an ordinal number is an ordinal number. |
| Ref | Expression |
|---|---|
| sucelon |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordsuc 3055 |
. . 3
| |
| 2 | sucexb 3038 |
. . 3
| |
| 3 | 1, 2 | anbi12i 481 |
. 2
|
| 4 | elon2 2949 |
. 2
| |
| 5 | elon2 2949 |
. 2
| |
| 6 | 3, 4, 5 | 3bitr4 183 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: onsucmin 3062 onsucuni2 3081 tfindsg2 3153 rdgsucopabn 3932 2on 4123 oaordi 4164 oalimcl 4178 omlimcl 4193 oeordi 4198 oeworde 4204 oeordsuc 4205 infensuc 4610 r1val1 4630 rankr1 4646 r1pwcl 4659 alephnbtwn 4840 cfsuc 4887 alephsuc3 7527 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 ax-un 2857 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 774 df-3an 775 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-ral 1641 df-rex 1642 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-tp 2405 df-op 2406 df-uni 2494 df-br 2610 df-opab 2657 df-tr 2671 df-eprel 2821 df-po 2831 df-so 2841 df-fr 2907 df-we 2924 df-ord 2941 df-on 2942 df-suc 2944 |