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| Mirrors > Home > MPE Home > Th. List > elqaalem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for elqaa 26307. 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 6828 | . . . . . . . . 9 ⊢ (𝑘 = 𝐾 → (𝐵‘𝑘) = (𝐵‘𝐾)) | |
| 2 | 1 | oveq1d 7372 | . . . . . . . 8 ⊢ (𝑘 = 𝐾 → ((𝐵‘𝑘) · 𝑛) = ((𝐵‘𝐾) · 𝑛)) |
| 3 | 2 | eleq1d 2824 | . . . . . . 7 ⊢ (𝑘 = 𝐾 → (((𝐵‘𝑘) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · 𝑛) ∈ ℤ)) |
| 4 | 3 | rabbidv 3398 | . . . . . 6 ⊢ (𝑘 = 𝐾 → {𝑛 ∈ ℕ ∣ ((𝐵‘𝑘) · 𝑛) ∈ ℤ} = {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}) |
| 5 | 4 | infeq1d 9382 | . . . . 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 11218 | . . . . . 6 ⊢ < Or ℝ | |
| 8 | 7 | infex 9399 | . . . . 5 ⊢ inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < ) ∈ V |
| 9 | 5, 6, 8 | fvmpt 6936 | . . . 4 ⊢ (𝐾 ∈ ℕ0 → (𝑁‘𝐾) = inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 10 | 9 | adantl 482 | . . 3 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝑁‘𝐾) = inf({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 11 | ssrab2 4012 | . . . . 5 ⊢ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ⊆ ℕ | |
| 12 | nnuz 12819 | . . . . 5 ⊢ ℕ = (ℤ≥‘1) | |
| 13 | 11, 12 | sseqtri 3963 | . . . 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 12527 | . . . . . . . . 9 ⊢ 0 ∈ ℤ | |
| 17 | zq 12896 | . . . . . . . . 9 ⊢ (0 ∈ ℤ → 0 ∈ ℚ) | |
| 18 | 16, 17 | ax-mp 5 | . . . . . . . 8 ⊢ 0 ∈ ℚ |
| 19 | elqaa.4 | . . . . . . . . 9 ⊢ 𝐵 = (coeff‘𝐹) | |
| 20 | 19 | coef2 26215 | . . . . . . . 8 ⊢ ((𝐹 ∈ (Poly‘ℚ) ∧ 0 ∈ ℚ) → 𝐵:ℕ0⟶ℚ) |
| 21 | 15, 18, 20 | sylancl 592 | . . . . . . 7 ⊢ (𝜑 → 𝐵:ℕ0⟶ℚ) |
| 22 | 21 | ffvelcdmda 7026 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → (𝐵‘𝐾) ∈ ℚ) |
| 23 | qmulz 12893 | . . . . . 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 4318 | . . . . 5 ⊢ ({𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅ ↔ ∃𝑛 ∈ ℕ ((𝐵‘𝐾) · 𝑛) ∈ ℤ) | |
| 26 | 24, 25 | sylibr 235 | . . . 4 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ≠ ∅) |
| 27 | infssuzcl 12874 | . . . 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 593 | . . 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 7365 | . . . 4 ⊢ (𝑛 = (𝑁‘𝐾) → ((𝐵‘𝐾) · 𝑛) = ((𝐵‘𝐾) · (𝑁‘𝐾))) | |
| 31 | 30 | eleq1d 2824 | . . 3 ⊢ (𝑛 = (𝑁‘𝐾) → (((𝐵‘𝐾) · 𝑛) ∈ ℤ ↔ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
| 32 | 31 | elrab 3629 | . 2 ⊢ ((𝑁‘𝐾) ∈ {𝑛 ∈ ℕ ∣ ((𝐵‘𝐾) · 𝑛) ∈ ℤ} ↔ ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
| 33 | 29, 32 | sylib 219 | 1 ⊢ ((𝜑 ∧ 𝐾 ∈ ℕ0) → ((𝑁‘𝐾) ∈ ℕ ∧ ((𝐵‘𝐾) · (𝑁‘𝐾)) ∈ ℤ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ≠ wne 2934 ∃wrex 3063 {crab 3391 ∖ cdif 3880 ⊆ wss 3883 ∅c0 4262 {csn 4556 ↦ cmpt 5154 ⟶wf 6482 ‘cfv 6486 (class class class)co 7357 infcinf 9345 ℂcc 11028 ℝcr 11029 0cc0 11030 1c1 11031 · cmul 11035 < clt 11171 ℕcn 12166 ℕ0cn0 12429 ℤcz 12516 ℤ≥cuz 12780 ℚcq 12890 seqcseq 13955 0𝑝c0p 25655 Polycply 26168 coeffccoe 26170 degcdgr 26171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5200 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-inf2 9554 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 ax-pre-sup 11108 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-int 4879 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-se 5573 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-isom 6495 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-of 7621 df-om 7808 df-1st 7932 df-2nd 7933 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-map 8766 df-pm 8767 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-sup 9346 df-inf 9347 df-oi 9416 df-card 9855 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-div 11800 df-nn 12167 df-2 12236 df-3 12237 df-n0 12430 df-z 12517 df-uz 12781 df-q 12891 df-rp 12935 df-fz 13454 df-fzo 13601 df-fl 13743 df-seq 13956 df-exp 14016 df-hash 14285 df-cj 15053 df-re 15054 df-im 15055 df-sqrt 15189 df-abs 15190 df-clim 15442 df-rlim 15443 df-sum 15641 df-0p 25656 df-ply 26172 df-coe 26174 |
| This theorem is referenced by: elqaalem2 26305 |
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