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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 26297 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 26297 | . . 3 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) | |
| 2 | zssq 12901 | . . . . . 6 ⊢ ℤ ⊆ ℚ | |
| 3 | qsscn 12905 | . . . . . 6 ⊢ ℚ ⊆ ℂ | |
| 4 | plyss 26178 | . . . . . 6 ⊢ ((ℤ ⊆ ℚ ∧ ℚ ⊆ ℂ) → (Poly‘ℤ) ⊆ (Poly‘ℚ)) | |
| 5 | 2, 3, 4 | mp2an 693 | . . . . 5 ⊢ (Poly‘ℤ) ⊆ (Poly‘ℚ) |
| 6 | ssdif 4085 | . . . . 5 ⊢ ((Poly‘ℤ) ⊆ (Poly‘ℚ) → ((Poly‘ℤ) ∖ {0𝑝}) ⊆ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 7 | ssrexv 3992 | . . . . 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 618 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 10 | 1, 9 | sylbi 217 | . 2 ⊢ (𝐴 ∈ 𝔸 → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 11 | simpll 767 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ ℂ) | |
| 12 | simplr 769 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 13 | simpr 484 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → (𝑓‘𝐴) = 0) | |
| 14 | eqid 2737 | . . . 4 ⊢ (coeff‘𝑓) = (coeff‘𝑓) | |
| 15 | fveq2 6836 | . . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((coeff‘𝑓)‘𝑚) = ((coeff‘𝑓)‘𝑘)) | |
| 16 | 15 | oveq1d 7377 | . . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (((coeff‘𝑓)‘𝑚) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑗)) |
| 17 | 16 | eleq1d 2822 | . . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ)) |
| 18 | 17 | rabbidv 3397 | . . . . . . 7 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ}) |
| 19 | oveq2 7370 | . . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (((coeff‘𝑓)‘𝑘) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑛)) | |
| 20 | 19 | eleq1d 2822 | . . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ)) |
| 21 | 20 | cbvrabv 3400 | . . . . . . 7 ⊢ {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ} |
| 22 | 18, 21 | eqtrdi 2788 | . . . . . 6 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}) |
| 23 | 22 | infeq1d 9386 | . . . . 5 ⊢ (𝑚 = 𝑘 → inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 24 | 23 | cbvmptv 5190 | . . . 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 2737 | . . . 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 26302 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 27 | 26 | r19.29an 3142 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 28 | 10, 27 | impbii 209 | 1 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 {crab 3390 ∖ cdif 3887 ⊆ wss 3890 {csn 4568 ↦ cmpt 5167 ‘cfv 6494 (class class class)co 7362 infcinf 9349 ℂcc 11031 ℝcr 11032 0cc0 11033 · cmul 11038 < clt 11174 ℕcn 12169 ℕ0cn0 12432 ℤcz 12519 ℚcq 12893 seqcseq 13958 0𝑝c0p 25650 Polycply 26163 coeffccoe 26165 degcdgr 26166 𝔸caa 26295 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5304 ax-pr 5372 ax-un 7684 ax-inf2 9557 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 ax-pre-sup 11111 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5521 df-eprel 5526 df-po 5534 df-so 5535 df-fr 5579 df-se 5580 df-we 5581 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-pred 6261 df-ord 6322 df-on 6323 df-lim 6324 df-suc 6325 df-iota 6450 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-isom 6503 df-riota 7319 df-ov 7365 df-oprab 7366 df-mpo 7367 df-of 7626 df-om 7813 df-1st 7937 df-2nd 7938 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-rdg 8344 df-1o 8400 df-er 8638 df-map 8770 df-pm 8771 df-en 8889 df-dom 8890 df-sdom 8891 df-fin 8892 df-sup 9350 df-inf 9351 df-oi 9420 df-card 9858 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-div 11803 df-nn 12170 df-2 12239 df-3 12240 df-n0 12433 df-z 12520 df-uz 12784 df-q 12894 df-rp 12938 df-fz 13457 df-fzo 13604 df-fl 13746 df-mod 13824 df-seq 13959 df-exp 14019 df-hash 14288 df-cj 15056 df-re 15057 df-im 15058 df-sqrt 15192 df-abs 15193 df-clim 15445 df-rlim 15446 df-sum 15644 df-0p 25651 df-ply 26167 df-coe 26169 df-dgr 26170 df-aa 26296 |
| This theorem is referenced by: qaa 26304 dgraalem 43595 dgraaub 43598 aaitgo 43612 aacllem 50292 |
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