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Mirrors > Home > MPE Home > Th. List > elqaalem1 | Structured version Visualization version GIF version |
Description: Lemma for elqaa 25387. The function 𝑁 represents the denominators of the rational coefficients 𝐵. By multiplying them all together to make 𝑅, we get a number big enough to clear all the denominators and make 𝑅 · 𝐹 an integer polynomial. (Contributed by Mario Carneiro, 23-Jul-2014.) (Revised by AV, 3-Oct-2020.) |
Ref | Expression |
---|---|
elqaa.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
elqaa.2 | ⊢ (𝜑 → 𝐹 ∈ ((Poly‘ℚ) ∖ {0𝑝})) |
elqaa.3 | ⊢ (𝜑 → (𝐹‘𝐴) = 0) |
elqaa.4 | ⊢ 𝐵 = (coeff‘𝐹) |
elqaa.5 | ⊢ 𝑁 = (𝑘 ∈ ℕ0 ↦ inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
elqaa.6 | ⊢ 𝑅 = (seq0( · , 𝑁)‘(deg‘𝐹)) |
Ref | Expression |
---|---|
elqaalem1 | ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6756 | . . . . . . . . 9 ⊢ (𝑘 = 𝐾 → (𝐵‘𝑘) = (𝐵‘𝐾)) | |
2 | 1 | oveq1d 7270 | . . . . . . . 8 ⊢ (𝑘 = 𝐾 → ((𝐵‘𝑘) · 𝑛) = ((𝐵‘𝐾) · 𝑛)) |
3 | 2 | eleq1d 2823 | . . . . . . 7 ⊢ (𝑘 = 𝐾 → (((𝐵‘𝑘) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · 𝑛) ∈ ℤ)) |
4 | 3 | rabbidv 3404 | . . . . . 6 ⊢ (𝑘 = 𝐾 → {𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ} = {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
5 | 4 | infeq1d 9166 | . . . . 5 ⊢ (𝑘 = 𝐾 → inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < )) |
6 | elqaa.5 | . . . . 5 ⊢ 𝑁 = (𝑘 ∈ ℕ0 ↦ inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) | |
7 | ltso 10986 | . . . . . 6 ⊢ < Or ℝ | |
8 | 7 | infex 9182 | . . . . 5 ⊢ inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < ) ∈ V |
9 | 5, 6, 8 | fvmpt 6857 | . . . 4 ⊢ (𝐾 ∈ ℕ0 → (𝑁‘𝐾) = inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < )) |
10 | 9 | adantl 481 | . . 3 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝑁‘𝐾) = inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < )) |
11 | ssrab2 4009 | . . . . 5 ⊢ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ ℕ | |
12 | nnuz 12550 | . . . . 5 ⊢ ℕ = (ℤ≥‘1) | |
13 | 11, 12 | sseqtri 3953 | . . . 4 ⊢ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ (ℤ≥‘1) |
14 | elqaa.2 | . . . . . . . . 9 ⊢ (𝜑 → 𝐹 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
15 | 14 | eldifad 3895 | . . . . . . . 8 ⊢ (𝜑 → 𝐹 ∈ (Poly‘ℚ)) |
16 | 0z 12260 | . . . . . . . . 9 ⊢ 0 ∈ ℤ | |
17 | zq 12623 | . . . . . . . . 9 ⊢ (0 ∈ ℤ → 0 ∈ ℚ) | |
18 | 16, 17 | ax-mp 5 | . . . . . . . 8 ⊢ 0 ∈ ℚ |
19 | elqaa.4 | . . . . . . . . 9 ⊢ 𝐵 = (coeff‘𝐹) | |
20 | 19 | coef2 25297 | . . . . . . . 8 ⊢ ((𝐹 ∈ (Poly‘ℚ) ∧ 0 ∈ ℚ) → 𝐵:ℕ0⟶ℚ) |
21 | 15, 18, 20 | sylancl 585 | . . . . . . 7 ⊢ (𝜑 → 𝐵:ℕ0⟶ℚ) |
22 | 21 | ffvelrnda 6943 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝐵‘𝐾) ∈ ℚ) |
23 | qmulz 12620 | . . . . . 6 ⊢ ((𝐵‘𝐾) ∈ ℚ → ∃𝑛 ∈ ℕ ((𝐵‘𝐾) · 𝑛) ∈ ℤ) | |
24 | 22, 23 | syl 17 | . . . . 5 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → ∃𝑛 ∈ ℕ ((𝐵‘𝐾) · 𝑛) ∈ ℤ) |
25 | rabn0 4316 | . . . . 5 ⊢ ({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅ ↔ ∃𝑛 ∈ ℕ ((𝐵‘𝐾) · 𝑛) ∈ ℤ) | |
26 | 24, 25 | sylibr 233 | . . . 4 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅) |
27 | infssuzcl 12601 | . . . 4 ⊢ (({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ (ℤ≥‘1) ∧ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅) → inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < ) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) | |
28 | 13, 26, 27 | sylancr 586 | . . 3 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < ) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
29 | 10, 28 | eqeltrd 2839 | . 2 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝑁‘𝐾) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
30 | oveq2 7263 | . . . 4 ⊢ (𝑛 = (𝑁‘𝐾) → ((𝐵‘𝐾) · 𝑛) = ((𝐵‘𝐾) · (𝑁‘𝐾))) | |
31 | 30 | eleq1d 2823 | . . 3 ⊢ (𝑛 = (𝑁‘𝐾) → (((𝐵‘𝐾) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
32 | 31 | elrab 3617 | . 2 ⊢ ((𝑁‘𝐾) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ↔ ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
33 | 29, 32 | sylib 217 | 1 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∃wrex 3064 {crab 3067 ∖ cdif 3880 ⊆ wss 3883 ∅c0 4253 {csn 4558 ↦ cmpt 5153 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 infcinf 9130 ℂcc 10800 ℝcr 10801 0cc0 10802 1c1 10803 · cmul 10807 < clt 10940 ℕcn 11903 ℕ0cn0 12163 ℤcz 12249 ℤ≥cuz 12511 ℚcq 12617 seqcseq 13649 0𝑝c0p 24738 Polycply 25250 coeffccoe 25252 degcdgr 25253 |
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-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 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 ax-pre-sup 10880 |
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-rmo 3071 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-int 4877 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-se 5536 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-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-fz 13169 df-fzo 13312 df-fl 13440 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-rlim 15126 df-sum 15326 df-0p 24739 df-ply 25254 df-coe 25256 |
This theorem is referenced by: elqaalem2 25385 |
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