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Theorem elqaa 26462
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.)
Assertion
Ref Expression
elqaa (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0))
Distinct variable group:   𝐴,𝑓

Proof of Theorem elqaa
Dummy variables 𝑘 𝑚 𝑛 𝑗 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elaa 26456 . . 3 (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓𝐴) = 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))
52, 3, 4mp2an 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})(𝑓𝐴) = 0 → ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0))
85, 6, 7mp2b 10 . . . 4 (∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓𝐴) = 0 → ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0)
98anim2i 628 . . 3 ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℤ) ∖ {0𝑝})(𝑓𝐴) = 0) → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0))
101, 9sylbi 220 . 2 (𝐴 ∈ 𝔸 → (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0))
11 simpll 778 . . . 4 (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓𝐴) = 0) → 𝐴 ∈ ℂ)
12 simplr 780 . . . 4 (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓𝐴) = 0) → 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝}))
13 simpr 489 . . . 4 (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓𝐴) = 0) → (𝑓𝐴) = 0)
14 eqid 2761 . . . 4 (coeff‘𝑓) = (coeff‘𝑓)
15 fveq2 6881 . . . . . . . . . 10 (𝑚 = 𝑘 → ((coeff‘𝑓)‘𝑚) = ((coeff‘𝑓)‘𝑘))
1615oveq1d 7425 . . . . . . . . 9 (𝑚 = 𝑘 → (((coeff‘𝑓)‘𝑚) · 𝑗) = (((coeff‘𝑓)‘𝑘) · 𝑗))
1716eleq1d 2846 . . . . . . . 8 (𝑚 = 𝑘 → ((((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ))
1817rabbidv 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))
2019eleq1d 2846 . . . . . . . 8 (𝑗 = 𝑛 → ((((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ ↔ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ))
2120cbvrabv 3424 . . . . . . 7 {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}
2218, 21eqtrdi 2812 . . . . . 6 (𝑚 = 𝑘 → {𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ} = {𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ})
2322infeq1d 9437 . . . . 5 (𝑚 = 𝑘 → inf({𝑗 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑚) · 𝑗) ∈ ℤ}, ℝ, < ) = inf({𝑛 ∈ ℕ ∣ (((coeff‘𝑓)‘𝑘) · 𝑛) ∈ ℤ}, ℝ, < ))
2423cbvmptv 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))
2611, 12, 13, 14, 24, 25elqaalem3 26461 . . 3 (((𝐴 ∈ ℂ ∧ 𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})) ∧ (𝑓𝐴) = 0) → 𝐴 ∈ 𝔸)
2726r19.29an 3167 . 2 ((𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 0) → 𝐴 ∈ 𝔸)
2810, 27impbii 212 1 (𝐴 ∈ 𝔸 ↔ (𝐴 ∈ ℂ ∧ ∃𝑓 ∈ ((Poly‘ℚ) ∖ {0𝑝})(𝑓𝐴) = 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  cc 11097  cr 11098  0cc0 11099   · cmul 11104   < clt 11242  cn 12232  0cn0 12503  cz 12590  cq 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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