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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 26456 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 26456 | . . 3 ⊢ (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓‘𝐴) = 0)) | |
| 2 | zssq 12979 | . . . . . 6 ⊢ ℤ ⊆ ℚ | |
| 3 | qsscn 12983 | . . . . . 6 ⊢ ℚ ⊆ ℂ | |
| 4 | plyss 26335 | . . . . . 6 ⊢ ((ℤ ⊆ ℚ ∧ ℚ ⊆ ℂ) → (Poly‘ℤ) ⊆ (Poly‘ℚ)) | |
| 5 | 2, 3, 4 | mp2an 704 | . . . . 5 ⊢ (Poly‘ℤ) ⊆ (Poly‘ℚ) |
| 6 | ssdif 4097 | . . . . 5 ⊢ ((Poly‘ℤ) ⊆ (Poly‘ℚ) → ((Poly‘ℤ) ∖ {0𝑝}) ⊆ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 7 | ssrexv 4006 | . . . . 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 628 | . . 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 778 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ ℂ) | |
| 12 | simplr 780 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) | |
| 13 | simpr 489 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → (𝑓‘𝐴) = 0) | |
| 14 | eqid 2761 | . . . 4 ⊢ (coeff‘𝑓) = (coeff‘𝑓) | |
| 15 | fveq2 6881 | . . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((coeff‘𝑓)‘𝑚) = ((coeff‘𝑓)‘𝑘)) | |
| 16 | 15 | oveq1d 7425 | . . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (((coeff‘𝑓)‘𝑚) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑗)) |
| 17 | 16 | eleq1d 2846 | . . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ)) |
| 18 | 17 | rabbidv 3421 | . . . . . . 7 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ}) |
| 19 | oveq2 7418 | . . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (((coeff‘𝑓)‘𝑘) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑛)) | |
| 20 | 19 | eleq1d 2846 | . . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ)) |
| 21 | 20 | cbvrabv 3424 | . . . . . . 7 ⊢ {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ} |
| 22 | 18, 21 | eqtrdi 2812 | . . . . . 6 ⊢ (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}) |
| 23 | 22 | infeq1d 9437 | . . . . 5 ⊢ (𝑚 = 𝑘 → inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < )) |
| 24 | 23 | cbvmptv 5214 | . . . 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 2761 | . . . 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 26461 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓‘𝐴) = 0) → 𝐴 ∈ 𝔸) |
| 27 | 26 | r19.29an 3167 | . 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 |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1568 ∈ wcel 2141 ∃wrex 3087 {crab 3414 ∖ cdif 3901 ⊆ wss 3904 {csn 4588 ↦ cmpt 5191 ‘cfv 6536 (class class class)co 7410 infcinf 9400 ℂcc 11097 ℝcr 11098 0cc0 11099 · cmul 11104 < clt 11242 ℕcn 12232 ℕ0cn0 12503 ℤcz 12590 ℚcq 12971 seqcseq 14036 0𝑝c0p 25807 Polycply 26320 coeffccoe 26322 degcdgr 26323 𝔸caa 26454 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9609 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 ax-pre-sup 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2095 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-se 5615 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-of 7674 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-map 8825 df-pm 8826 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-sup 9401 df-inf 9402 df-oi 9471 df-card 9924 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-div 11871 df-nn 12233 df-2 12302 df-3 12303 df-n0 12504 df-z 12591 df-uz 12862 df-q 12972 df-rp 13016 df-fz 13535 df-fzo 13682 df-fl 13824 df-mod 13902 df-seq 14037 df-exp 14097 df-hash 14366 df-cj 15149 df-re 15150 df-im 15151 df-sqrt 15285 df-abs 15286 df-clim 15538 df-rlim 15539 df-sum 15737 df-0p 25808 df-ply 26324 df-coe 26326 df-dgr 26327 df-aa 26455 |
| This theorem is referenced by: qaa 26463 dgraalem 43820 dgraaub 43823 aaitgo 43837 aacllem 50546 |
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