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Mirrors > Home > MPE Home > Th. List > sucelon | Structured version Visualization version GIF version |
Description: The successor of an ordinal number is an ordinal number. (Contributed by NM, 9-Sep-2003.) |
Ref | Expression |
---|---|
sucelon | ⊢ (𝐴 ∈ On ↔ suc 𝐴 ∈ On) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordsuc 7345 | . . 3 ⊢ (Ord 𝐴 ↔ Ord suc 𝐴) | |
2 | sucexb 7340 | . . 3 ⊢ (𝐴 ∈ V ↔ suc 𝐴 ∈ V) | |
3 | 1, 2 | anbi12i 617 | . 2 ⊢ ((Ord 𝐴 ∧ 𝐴 ∈ V) ↔ (Ord suc 𝐴 ∧ suc 𝐴 ∈ V)) |
4 | elon2 6040 | . 2 ⊢ (𝐴 ∈ On ↔ (Ord 𝐴 ∧ 𝐴 ∈ V)) | |
5 | elon2 6040 | . 2 ⊢ (suc 𝐴 ∈ On ↔ (Ord suc 𝐴 ∧ suc 𝐴 ∈ V)) | |
6 | 3, 4, 5 | 3bitr4i 295 | 1 ⊢ (𝐴 ∈ On ↔ suc 𝐴 ∈ On) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 198 ∧ wa 387 ∈ wcel 2050 Vcvv 3416 Ord word 6028 Oncon0 6029 suc csuc 6031 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1758 ax-4 1772 ax-5 1869 ax-6 1928 ax-7 1965 ax-8 2052 ax-9 2059 ax-10 2079 ax-11 2093 ax-12 2106 ax-13 2301 ax-ext 2751 ax-sep 5060 ax-nul 5067 ax-pr 5186 ax-un 7279 |
This theorem depends on definitions: df-bi 199 df-an 388 df-or 834 df-3or 1069 df-3an 1070 df-tru 1510 df-ex 1743 df-nf 1747 df-sb 2016 df-mo 2547 df-eu 2584 df-clab 2760 df-cleq 2772 df-clel 2847 df-nfc 2919 df-ne 2969 df-ral 3094 df-rex 3095 df-rab 3098 df-v 3418 df-sbc 3683 df-dif 3833 df-un 3835 df-in 3837 df-ss 3844 df-pss 3846 df-nul 4180 df-if 4351 df-sn 4442 df-pr 4444 df-tp 4446 df-op 4448 df-uni 4713 df-br 4930 df-opab 4992 df-tr 5031 df-eprel 5317 df-po 5326 df-so 5327 df-fr 5366 df-we 5368 df-ord 6032 df-on 6033 df-suc 6035 |
This theorem is referenced by: onsucmin 7352 tfindsg2 7392 oaordi 7973 oalimcl 7987 omlimcl 8005 omeulem1 8009 oeordsuc 8021 infensuc 8491 cantnflem1b 8943 cantnflem1 8946 r1ordg 9001 alephnbtwn 9291 cfsuc 9477 alephsuc3 9800 alephreg 9802 bdayimaon 32715 nosupbnd1lem1 32726 nosupbnd1 32732 nosupbnd2lem1 32733 nosupbnd2 32734 |
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