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| Mirrors > Home > MPE Home > Th. List > elqaa | Structured version Visualization version GIF version | ||
| Description: The set of numbers generated by the roots of polynomials in the rational numbers is the same as the set of algebraic numbers, which by elaa 26382 are defined only in terms of polynomials over the integers. (Contributed by Mario Carneiro, 23-Jul-2014.) (Proof shortened by AV, 3-Oct-2020.) |
| Ref | Expression |
|---|---|
| elqaa | ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elaa 26382 | . . 3 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) | |
| 2 | zssq 12959 | . . . . . 6 ⊢ ℤ ⊆ ℚ | |
| 3 | qsscn 12963 | . . . . . 6 ⊢ ℚ ⊆ ℂ | |
| 4 | plyss 26261 | . . . . . 6 ⊢ ((ℤ ⊆ ℚ ∧ ℚ ⊆ ℂ) → (Poly‘ℤ) ⊆ (Poly‘ℚ)) | |
| 5 | 2, 3, 4 | mp2an 702 | . . . . 5 ⊢ (Poly‘ℤ) ⊆ (Poly‘ℚ) |
| 6 | ssdif 4099 | . . . . 5 ⊢ ((Poly‘ℤ) ⊆ (Poly‘ℚ) → ((Poly‘ℤ) ∖ {0𝑝}) ⊆ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 7 | ssrexv 4008 | . . . . 5 ⊢ (((Poly‘ℤ) ∖ {0𝑝}) ⊆ ((Poly‘ℚ) ∖ {0𝑝}) → (∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0 → ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) | |
| 8 | 5, 6, 7 | mp2b 10 | . . . 4 ⊢ (∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0 → ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0) |
| 9 | 8 | anim2i 626 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 10 | 1, 9 | sylbi 219 | . 2 ⊢ (𝐴 ∈ 𝔸 → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 11 | simpll 776 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ ℂ) | |
| 12 | simplr 778 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 13 | simpr 488 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → (𝑓‘𝐴) = 0) | |
| 14 | eqid 2764 | . . . 4 ⊢ (coeff‘𝑓) = (coeff‘𝑓) | |
| 15 | fveq2 6869 | . . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((coeff‘𝑓)‘𝑚) = ((coeff‘𝑓)‘𝑘)) | |
| 16 | 15 | oveq1d 7413 | . . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (((coeff‘𝑓)‘𝑚) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑗)) |
| 17 | 16 | eleq1d 2849 | . . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ)) |
| 18 | 17 | rabbidv 3423 | . . . . . . 7 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ}) |
| 19 | oveq2 7406 | . . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (((coeff‘𝑓)‘𝑘) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑛)) | |
| 20 | 19 | eleq1d 2849 | . . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ)) |
| 21 | 20 | cbvrabv 3426 | . . . . . . 7 ⊢ {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ} |
| 22 | 18, 21 | eqtrdi 2815 | . . . . . 6 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}) |
| 23 | 22 | infeq1d 9426 | . . . . 5 ⊢ (𝑚 = 𝑘 → inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 24 | 23 | cbvmptv 5206 | . . . 4 ⊢ (𝑚 ∈ ℕ0 ↦ inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < )) = (𝑘 ∈ ℕ0 ↦ inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 25 | eqid 2764 | . . . 4 ⊢ (seq0( · , (𝑚 ∈ ℕ0 ↦ inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < )))‘(deg‘𝑓)) = (seq0( · , (𝑚 ∈ ℕ0 ↦ inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < )))‘(deg‘𝑓)) | |
| 26 | 11, 12, 13, 14, 24, 25 | elqaalem3 26387 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 27 | 26 | r19.29an 3168 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 28 | 10, 27 | impbii 211 | 1 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1562 ∈ wcel 2144 ∃wrex 3088 {crab 3416 ∖ cdif 3903 ⊆ wss 3906 {csn 4584 ↦ cmpt 5183 ‘cfv 6523 (class class class)co 7398 infcinf 9389 ℂcc 11073 ℝcr 11074 0cc0 11075 · cmul 11080 < clt 11218 ℕcn 12212 ℕ0cn0 12483 ℤcz 12570 ℚcq 12951 seqcseq 14016 0𝑝c0p 25733 Polycply 26246 coeffccoe 26248 degcdgr 26249 𝔸caa 26380 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-rep 5229 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 ax-inf2 9598 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-se 5603 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-isom 6532 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-of 7662 df-om 7849 df-1st 7972 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-1o 8439 df-er 8680 df-map 8812 df-pm 8813 df-en 8930 df-dom 8931 df-sdom 8932 df-fin 8933 df-sup 9390 df-inf 9391 df-oi 9460 df-card 9899 df-pnf 11220 df-mnf 11221 df-xr 11222 df-ltxr 11223 df-le 11224 df-sub 11418 df-neg 11419 df-div 11847 df-nn 12213 df-2 12282 df-3 12283 df-n0 12484 df-z 12571 df-uz 12842 df-q 12952 df-rp 12996 df-fz 13515 df-fzo 13662 df-fl 13804 df-mod 13882 df-seq 14017 df-exp 14077 df-hash 14346 df-cj 15128 df-re 15129 df-im 15130 df-sqrt 15264 df-abs 15265 df-clim 15517 df-rlim 15518 df-sum 15716 df-0p 25734 df-ply 26250 df-coe 26252 df-dgr 26253 df-aa 26381 |
| This theorem is referenced by: qaa 26389 dgraalem 43727 dgraaub 43730 aaitgo 43744 aacllem 50427 |
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