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Mirrors > Home > MPE Home > Th. List > elqaalem1 | Structured version Visualization version GIF version |
Description: Lemma for elqaa 26382. 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 6920 | . . . . . . . . 9 ⊢ (𝑘 = 𝐾 → (𝐵‘𝑘) = (𝐵‘𝐾)) | |
2 | 1 | oveq1d 7463 | . . . . . . . 8 ⊢ (𝑘 = 𝐾 → ((𝐵‘𝑘) · 𝑛) = ((𝐵‘𝐾) · 𝑛)) |
3 | 2 | eleq1d 2829 | . . . . . . 7 ⊢ (𝑘 = 𝐾 → (((𝐵‘𝑘) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · 𝑛) ∈ ℤ)) |
4 | 3 | rabbidv 3451 | . . . . . 6 ⊢ (𝑘 = 𝐾 → {𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ} = {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
5 | 4 | infeq1d 9546 | . . . . 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 11370 | . . . . . 6 ⊢ < Or ℝ | |
8 | 7 | infex 9562 | . . . . 5 ⊢ inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < ) ∈ V |
9 | 5, 6, 8 | fvmpt 7029 | . . . 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 4103 | . . . . 5 ⊢ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ ℕ | |
12 | nnuz 12946 | . . . . 5 ⊢ ℕ = (ℤ≥‘1) | |
13 | 11, 12 | sseqtri 4045 | . . . 4 ⊢ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ (ℤ≥‘1) |
14 | elqaa.2 | . . . . . . . . 9 ⊢ (𝜑 → 𝐹 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
15 | 14 | eldifad 3988 | . . . . . . . 8 ⊢ (𝜑 → 𝐹 ∈ (Poly‘ℚ)) |
16 | 0z 12650 | . . . . . . . . 9 ⊢ 0 ∈ ℤ | |
17 | zq 13019 | . . . . . . . . 9 ⊢ (0 ∈ ℤ → 0 ∈ ℚ) | |
18 | 16, 17 | ax-mp 5 | . . . . . . . 8 ⊢ 0 ∈ ℚ |
19 | elqaa.4 | . . . . . . . . 9 ⊢ 𝐵 = (coeff‘𝐹) | |
20 | 19 | coef2 26290 | . . . . . . . 8 ⊢ ((𝐹 ∈ (Poly‘ℚ) ∧ 0 ∈ ℚ) → 𝐵:ℕ0⟶ℚ) |
21 | 15, 18, 20 | sylancl 585 | . . . . . . 7 ⊢ (𝜑 → 𝐵:ℕ0⟶ℚ) |
22 | 21 | ffvelcdmda 7118 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝐵‘𝐾) ∈ ℚ) |
23 | qmulz 13016 | . . . . . 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 4412 | . . . . 5 ⊢ ({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅ ↔ ∃𝑛 ∈ ℕ ((𝐵‘𝐾) · 𝑛) ∈ ℤ) | |
26 | 24, 25 | sylibr 234 | . . . 4 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅) |
27 | infssuzcl 12997 | . . . 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 2844 | . 2 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝑁‘𝐾) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
30 | oveq2 7456 | . . . 4 ⊢ (𝑛 = (𝑁‘𝐾) → ((𝐵‘𝐾) · 𝑛) = ((𝐵‘𝐾) · (𝑁‘𝐾))) | |
31 | 30 | eleq1d 2829 | . . 3 ⊢ (𝑛 = (𝑁‘𝐾) → (((𝐵‘𝐾) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
32 | 31 | elrab 3708 | . 2 ⊢ ((𝑁‘𝐾) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ↔ ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
33 | 29, 32 | sylib 218 | 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 1537 ∈ wcel 2108 ≠ wne 2946 ∃wrex 3076 {crab 3443 ∖ cdif 3973 ⊆ wss 3976 ∅c0 4352 {csn 4648 ↦ cmpt 5249 ⟶wf 6569 ‘cfv 6573 (class class class)co 7448 infcinf 9510 ℂcc 11182 ℝcr 11183 0cc0 11184 1c1 11185 · cmul 11189 < clt 11324 ℕcn 12293 ℕ0cn0 12553 ℤcz 12639 ℤ≥cuz 12903 ℚcq 13013 seqcseq 14052 0𝑝c0p 25723 Polycply 26243 coeffccoe 26245 degcdgr 26246 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-inf2 9710 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 ax-pre-sup 11262 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-int 4971 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-se 5653 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-isom 6582 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-of 7714 df-om 7904 df-1st 8030 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-1o 8522 df-er 8763 df-map 8886 df-pm 8887 df-en 9004 df-dom 9005 df-sdom 9006 df-fin 9007 df-sup 9511 df-inf 9512 df-oi 9579 df-card 10008 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-div 11948 df-nn 12294 df-2 12356 df-3 12357 df-n0 12554 df-z 12640 df-uz 12904 df-q 13014 df-rp 13058 df-fz 13568 df-fzo 13712 df-fl 13843 df-seq 14053 df-exp 14113 df-hash 14380 df-cj 15148 df-re 15149 df-im 15150 df-sqrt 15284 df-abs 15285 df-clim 15534 df-rlim 15535 df-sum 15735 df-0p 25724 df-ply 26247 df-coe 26249 |
This theorem is referenced by: elqaalem2 26380 |
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