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Mirrors > Home > MPE Home > Th. List > om2uzuzi | Structured version Visualization version GIF version |
Description: The value 𝐺 (see om2uz0i 13595) at an ordinal natural number is in the upper integers. (Contributed by NM, 3-Oct-2004.) (Revised by Mario Carneiro, 13-Sep-2013.) |
Ref | Expression |
---|---|
om2uz.1 | ⊢ 𝐶 ∈ ℤ |
om2uz.2 | ⊢ 𝐺 = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 𝐶) ↾ ω) |
Ref | Expression |
---|---|
om2uzuzi | ⊢ (𝐴 ∈ ω → (𝐺‘𝐴) ∈ (ℤ≥‘𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6756 | . . 3 ⊢ (𝑦 = ∅ → (𝐺‘𝑦) = (𝐺‘∅)) | |
2 | 1 | eleq1d 2823 | . 2 ⊢ (𝑦 = ∅ → ((𝐺‘𝑦) ∈ (ℤ≥‘𝐶) ↔ (𝐺‘∅) ∈ (ℤ≥‘𝐶))) |
3 | fveq2 6756 | . . 3 ⊢ (𝑦 = 𝑧 → (𝐺‘𝑦) = (𝐺‘𝑧)) | |
4 | 3 | eleq1d 2823 | . 2 ⊢ (𝑦 = 𝑧 → ((𝐺‘𝑦) ∈ (ℤ≥‘𝐶) ↔ (𝐺‘𝑧) ∈ (ℤ≥‘𝐶))) |
5 | fveq2 6756 | . . 3 ⊢ (𝑦 = suc 𝑧 → (𝐺‘𝑦) = (𝐺‘suc 𝑧)) | |
6 | 5 | eleq1d 2823 | . 2 ⊢ (𝑦 = suc 𝑧 → ((𝐺‘𝑦) ∈ (ℤ≥‘𝐶) ↔ (𝐺‘suc 𝑧) ∈ (ℤ≥‘𝐶))) |
7 | fveq2 6756 | . . 3 ⊢ (𝑦 = 𝐴 → (𝐺‘𝑦) = (𝐺‘𝐴)) | |
8 | 7 | eleq1d 2823 | . 2 ⊢ (𝑦 = 𝐴 → ((𝐺‘𝑦) ∈ (ℤ≥‘𝐶) ↔ (𝐺‘𝐴) ∈ (ℤ≥‘𝐶))) |
9 | om2uz.1 | . . . 4 ⊢ 𝐶 ∈ ℤ | |
10 | om2uz.2 | . . . 4 ⊢ 𝐺 = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 𝐶) ↾ ω) | |
11 | 9, 10 | om2uz0i 13595 | . . 3 ⊢ (𝐺‘∅) = 𝐶 |
12 | uzid 12526 | . . . 4 ⊢ (𝐶 ∈ ℤ → 𝐶 ∈ (ℤ≥‘𝐶)) | |
13 | 9, 12 | ax-mp 5 | . . 3 ⊢ 𝐶 ∈ (ℤ≥‘𝐶) |
14 | 11, 13 | eqeltri 2835 | . 2 ⊢ (𝐺‘∅) ∈ (ℤ≥‘𝐶) |
15 | peano2uz 12570 | . . 3 ⊢ ((𝐺‘𝑧) ∈ (ℤ≥‘𝐶) → ((𝐺‘𝑧) + 1) ∈ (ℤ≥‘𝐶)) | |
16 | 9, 10 | om2uzsuci 13596 | . . . 4 ⊢ (𝑧 ∈ ω → (𝐺‘suc 𝑧) = ((𝐺‘𝑧) + 1)) |
17 | 16 | eleq1d 2823 | . . 3 ⊢ (𝑧 ∈ ω → ((𝐺‘suc 𝑧) ∈ (ℤ≥‘𝐶) ↔ ((𝐺‘𝑧) + 1) ∈ (ℤ≥‘𝐶))) |
18 | 15, 17 | syl5ibr 245 | . 2 ⊢ (𝑧 ∈ ω → ((𝐺‘𝑧) ∈ (ℤ≥‘𝐶) → (𝐺‘suc 𝑧) ∈ (ℤ≥‘𝐶))) |
19 | 2, 4, 6, 8, 14, 18 | finds 7719 | 1 ⊢ (𝐴 ∈ ω → (𝐺‘𝐴) ∈ (ℤ≥‘𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ∅c0 4253 ↦ cmpt 5153 ↾ cres 5582 suc csuc 6253 ‘cfv 6418 (class class class)co 7255 ωcom 7687 reccrdg 8211 1c1 10803 + caddc 10805 ℤcz 12249 ℤ≥cuz 12511 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-n0 12164 df-z 12250 df-uz 12512 |
This theorem is referenced by: om2uzlti 13598 om2uzlt2i 13599 om2uzrani 13600 om2uzf1oi 13601 uzrdgfni 13606 uzrdgxfr 13615 unbenlem 16537 |
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