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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 26602 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 26602 | . . 3 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) | |
| 2 | zssq 13052 | . . . . . 6 ⊢ ℤ ⊆ ℚ | |
| 3 | qsscn 13056 | . . . . . 6 ⊢ ℚ ⊆ ℂ | |
| 4 | plyss 26478 | . . . . . 6 ⊢ ((ℤ ⊆ ℚ ∧ ℚ ⊆ ℂ) → (Poly‘ℤ) ⊆ (Poly‘ℚ)) | |
| 5 | 2, 3, 4 | mp2an 705 | . . . . 5 ⊢ (Poly‘ℤ) ⊆ (Poly‘ℚ) |
| 6 | ssdif 4090 | . . . . 5 ⊢ ((Poly‘ℤ) ⊆ (Poly‘ℚ) → ((Poly‘ℤ) ∖ {0𝑝}) ⊆ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 7 | ssrexv 4000 | . . . . 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 629 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 10 | 1, 9 | sylbi 220 | . 2 ⊢ (𝐴 ∈ 𝔸 → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| 11 | simpll 779 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ ℂ) | |
| 12 | simplr 781 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 13 | simpr 490 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → (𝑓‘𝐴) = 0) | |
| 14 | eqid 2760 | . . . 4 ⊢ (coeff‘𝑓) = (coeff‘𝑓) | |
| 15 | fveq2 6873 | . . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((coeff‘𝑓)‘𝑚) = ((coeff‘𝑓)‘𝑘)) | |
| 16 | 15 | oveq1d 7423 | . . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (((coeff‘𝑓)‘𝑚) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑗)) |
| 17 | 16 | eleq1d 2845 | . . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ)) |
| 18 | 17 | rabbidv 3419 | . . . . . . 7 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ}) |
| 19 | oveq2 7416 | . . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (((coeff‘𝑓)‘𝑘) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑛)) | |
| 20 | 19 | eleq1d 2845 | . . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ)) |
| 21 | 20 | cbvrabv 3422 | . . . . . . 7 ⊢ {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ} |
| 22 | 18, 21 | eqtrdi 2811 | . . . . . 6 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}) |
| 23 | 22 | infeq1d 9448 | . . . . 5 ⊢ (𝑚 = 𝑘 → inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 24 | 23 | cbvmptv 5208 | . . . 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 2760 | . . . 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 26607 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 27 | 26 | r19.29an 3166 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 28 | 10, 27 | impbii 212 | 1 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∃wrex 3086 {crab 3412 ∖ cdif 3895 ⊆ wss 3898 {csn 4583 ↦ cmpt 5185 ‘cfv 6527 (class class class)co 7408 infcinf 9411 ℂcc 11169 ℝcr 11170 0cc0 11171 · cmul 11176 < clt 11314 ℕcn 12304 ℕ0cn0 12575 ℤcz 12662 ℚcq 13044 seqcseq 14112 0𝑝c0p 25951 Polycply 26463 coeffccoe 26465 degcdgr 26466 𝔸caa 26600 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-inf2 9620 ax-cnex 11227 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 ax-pre-mulgt0 11248 ax-pre-sup 11249 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-se 5601 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-isom 6536 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-of 7676 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8454 df-er 8695 df-map 8827 df-pm 8828 df-en 8952 df-dom 8953 df-sdom 8954 df-fin 8955 df-sup 9412 df-inf 9413 df-oi 9482 df-card 9991 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-div 11943 df-nn 12305 df-2 12374 df-3 12375 df-n0 12576 df-z 12663 df-uz 12935 df-q 13045 df-rp 13090 df-fz 13609 df-fzo 13757 df-fl 13900 df-mod 13978 df-seq 14113 df-exp 14173 df-hash 14442 df-cj 15233 df-re 15234 df-im 15235 df-sqrt 15369 df-abs 15370 df-clim 15622 df-rlim 15623 df-sum 15821 df-0p 25952 df-ply 26467 df-coe 26469 df-dgr 26470 df-aa 26601 |
| This theorem is used by: preimaaa 26609 qaa 26610 dgraalem 44090 dgraaub 44093 aaitgo 44107 sqrtnzqaa 47836 aacllem 50861 |
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