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Theorem constrsscn 34139
Description: Closure of the constructible points in the complex numbers. (Contributed by Thierry Arnoux, 25-Jun-2025.)
Hypotheses
Ref Expression
constr0.1 𝐶 = rec((𝑠 ∈ V ↦ {𝑥 ∈ ℂ ∣ (∃𝑎𝑠𝑏𝑠𝑐𝑠𝑑𝑠𝑡 ∈ ℝ ∃𝑟 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ 𝑥 = (𝑐 + (𝑟 · (𝑑𝑐))) ∧ (ℑ‘((∗‘(𝑏𝑎)) · (𝑑𝑐))) ≠ 0) ∨ ∃𝑎𝑠𝑏𝑠𝑐𝑠𝑒𝑠𝑓𝑠𝑡 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ (abs‘(𝑥𝑐)) = (abs‘(𝑒𝑓))) ∨ ∃𝑎𝑠𝑏𝑠𝑐𝑠𝑑𝑠𝑒𝑠𝑓𝑠 (𝑎𝑑 ∧ (abs‘(𝑥𝑎)) = (abs‘(𝑏𝑐)) ∧ (abs‘(𝑥𝑑)) = (abs‘(𝑒𝑓))))}), {0, 1})
constrsscn.1 (𝜑𝑁 ∈ On)
Assertion
Ref Expression
constrsscn (𝜑 → (𝐶𝑁) ⊆ ℂ)
Distinct variable groups:   𝐶,𝑎,𝑠,𝑥   𝐶,𝑏,𝑠,𝑥   𝐶,𝑐,𝑠,𝑥   𝐶,𝑑,𝑠,𝑥   𝐶,𝑒,𝑠,𝑥   𝐶,𝑓,𝑠,𝑥   𝑠,𝑟,𝑥   𝑡,𝑠,𝑥
Allowed substitution hints:   𝜑(𝑥, 𝑡, 𝑒, 𝑓, 𝑠, 𝑟, 𝑎, 𝑏, 𝑐, 𝑑)   𝐶(𝑡, 𝑟)   𝑁(𝑥, 𝑡, 𝑒, 𝑓, 𝑠, 𝑟, 𝑎, 𝑏, 𝑐, 𝑑)

Proof of Theorem constrsscn
Dummy variables 𝑛 𝑜 𝑚 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 constrsscn.1 . 2 (𝜑𝑁 ∈ On)
2 fveq2 6881 . . . 4 (𝑚 = ∅ → (𝐶𝑚) = (𝐶‘∅))
32sseq1d 3967 . . 3 (𝑚 = ∅ → ((𝐶𝑚) ⊆ ℂ ↔ (𝐶‘∅) ⊆ ℂ))
4 fveq2 6881 . . . 4 (𝑚 = 𝑛 → (𝐶𝑚) = (𝐶𝑛))
54sseq1d 3967 . . 3 (𝑚 = 𝑛 → ((𝐶𝑚) ⊆ ℂ ↔ (𝐶𝑛) ⊆ ℂ))
6 fveq2 6881 . . . 4 (𝑚 = suc 𝑛 → (𝐶𝑚) = (𝐶‘suc 𝑛))
76sseq1d 3967 . . 3 (𝑚 = suc 𝑛 → ((𝐶𝑚) ⊆ ℂ ↔ (𝐶‘suc 𝑛) ⊆ ℂ))
8 fveq2 6881 . . . 4 (𝑚 = 𝑁 → (𝐶𝑚) = (𝐶𝑁))
98sseq1d 3967 . . 3 (𝑚 = 𝑁 → ((𝐶𝑚) ⊆ ℂ ↔ (𝐶𝑁) ⊆ ℂ))
10 constr0.1 . . . . 5 𝐶 = rec((𝑠 ∈ V ↦ {𝑥 ∈ ℂ ∣ (∃𝑎𝑠𝑏𝑠𝑐𝑠𝑑𝑠𝑡 ∈ ℝ ∃𝑟 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ 𝑥 = (𝑐 + (𝑟 · (𝑑𝑐))) ∧ (ℑ‘((∗‘(𝑏𝑎)) · (𝑑𝑐))) ≠ 0) ∨ ∃𝑎𝑠𝑏𝑠𝑐𝑠𝑒𝑠𝑓𝑠𝑡 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ (abs‘(𝑥𝑐)) = (abs‘(𝑒𝑓))) ∨ ∃𝑎𝑠𝑏𝑠𝑐𝑠𝑑𝑠𝑒𝑠𝑓𝑠 (𝑎𝑑 ∧ (abs‘(𝑥𝑎)) = (abs‘(𝑏𝑐)) ∧ (abs‘(𝑥𝑑)) = (abs‘(𝑒𝑓))))}), {0, 1})
1110constr0 34136 . . . 4 (𝐶‘∅) = {0, 1}
12 0cn 11204 . . . . 5 0 ∈ ℂ
13 ax-1cn 11164 . . . . 5 1 ∈ ℂ
14 prssi 4786 . . . . 5 ((0 ∈ ℂ ∧ 1 ∈ ℂ) → {0, 1} ⊆ ℂ)
1512, 13, 14mp2an 704 . . . 4 {0, 1} ⊆ ℂ
1611, 15eqsstri 3982 . . 3 (𝐶‘∅) ⊆ ℂ
17 simpl 487 . . . . . . . . 9 ((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) → 𝑛 ∈ On)
18 eqid 2762 . . . . . . . . 9 (𝐶𝑛) = (𝐶𝑛)
1910, 17, 18constrsuc 34137 . . . . . . . 8 ((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) → (𝑥 ∈ (𝐶‘suc 𝑛) ↔ (𝑥 ∈ ℂ ∧ (∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑑 ∈ (𝐶𝑛)∃𝑡 ∈ ℝ ∃𝑟 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ 𝑥 = (𝑐 + (𝑟 · (𝑑𝑐))) ∧ (ℑ‘((∗‘(𝑏𝑎)) · (𝑑𝑐))) ≠ 0) ∨ ∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑒 ∈ (𝐶𝑛)∃𝑓 ∈ (𝐶𝑛)∃𝑡 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ (abs‘(𝑥𝑐)) = (abs‘(𝑒𝑓))) ∨ ∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑑 ∈ (𝐶𝑛)∃𝑒 ∈ (𝐶𝑛)∃𝑓 ∈ (𝐶𝑛)(𝑎𝑑 ∧ (abs‘(𝑥𝑎)) = (abs‘(𝑏𝑐)) ∧ (abs‘(𝑥𝑑)) = (abs‘(𝑒𝑓)))))))
2019biimpa 481 . . . . . . 7 (((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) ∧ 𝑥 ∈ (𝐶‘suc 𝑛)) → (𝑥 ∈ ℂ ∧ (∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑑 ∈ (𝐶𝑛)∃𝑡 ∈ ℝ ∃𝑟 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ 𝑥 = (𝑐 + (𝑟 · (𝑑𝑐))) ∧ (ℑ‘((∗‘(𝑏𝑎)) · (𝑑𝑐))) ≠ 0) ∨ ∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑒 ∈ (𝐶𝑛)∃𝑓 ∈ (𝐶𝑛)∃𝑡 ∈ ℝ (𝑥 = (𝑎 + (𝑡 · (𝑏𝑎))) ∧ (abs‘(𝑥𝑐)) = (abs‘(𝑒𝑓))) ∨ ∃𝑎 ∈ (𝐶𝑛)∃𝑏 ∈ (𝐶𝑛)∃𝑐 ∈ (𝐶𝑛)∃𝑑 ∈ (𝐶𝑛)∃𝑒 ∈ (𝐶𝑛)∃𝑓 ∈ (𝐶𝑛)(𝑎𝑑 ∧ (abs‘(𝑥𝑎)) = (abs‘(𝑏𝑐)) ∧ (abs‘(𝑥𝑑)) = (abs‘(𝑒𝑓))))))
2120simpld 499 . . . . . 6 (((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) ∧ 𝑥 ∈ (𝐶‘suc 𝑛)) → 𝑥 ∈ ℂ)
2221ex 417 . . . . 5 ((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) → (𝑥 ∈ (𝐶‘suc 𝑛) → 𝑥 ∈ ℂ))
2322ssrdv 3942 . . . 4 ((𝑛 ∈ On ∧ (𝐶𝑛) ⊆ ℂ) → (𝐶‘suc 𝑛) ⊆ ℂ)
2423ex 417 . . 3 (𝑛 ∈ On → ((𝐶𝑛) ⊆ ℂ → (𝐶‘suc 𝑛) ⊆ ℂ))
25 vex 3458 . . . . . . 7 𝑚 ∈ V
2625a1i 11 . . . . . 6 ((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) → 𝑚 ∈ V)
27 simpl 487 . . . . . 6 ((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) → Lim 𝑚)
2810, 26, 27constrlim 34138 . . . . 5 ((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) → (𝐶𝑚) = 𝑜𝑚 (𝐶𝑜))
29 fveq2 6881 . . . . . . . 8 (𝑛 = 𝑜 → (𝐶𝑛) = (𝐶𝑜))
3029sseq1d 3967 . . . . . . 7 (𝑛 = 𝑜 → ((𝐶𝑛) ⊆ ℂ ↔ (𝐶𝑜) ⊆ ℂ))
31 simplr 780 . . . . . . 7 (((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) ∧ 𝑜𝑚) → ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ)
32 simpr 489 . . . . . . 7 (((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) ∧ 𝑜𝑚) → 𝑜𝑚)
3330, 31, 32rspcdva 3581 . . . . . 6 (((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) ∧ 𝑜𝑚) → (𝐶𝑜) ⊆ ℂ)
3433iunssd 5014 . . . . 5 ((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) → 𝑜𝑚 (𝐶𝑜) ⊆ ℂ)
3528, 34eqsstrd 3970 . . . 4 ((Lim 𝑚 ∧ ∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ) → (𝐶𝑚) ⊆ ℂ)
3635ex 417 . . 3 (Lim 𝑚 → (∀𝑛𝑚 (𝐶𝑛) ⊆ ℂ → (𝐶𝑚) ⊆ ℂ))
373, 5, 7, 9, 16, 24, 36tfinds 7854 . 2 (𝑁 ∈ On → (𝐶𝑁) ⊆ ℂ)
381, 37syl 18 1 (𝜑 → (𝐶𝑁) ⊆ ℂ)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 400  w3o 1101  w3a 1102   = wceq 1569  wcel 2142  wne 2957  wral 3078  wrex 3088  {crab 3415  Vcvv 3454  wss 3904  c0 4285  {cpr 4590   ciun 4955  cmpt 5191  Oncon0 6360  Lim wlim 6361  suc csuc 6362  cfv 6536  (class class class)co 7412  reccrdg 8394  cc 11104  cr 11105  0cc0 11106  1c1 11107   + caddc 11109   · cmul 11111  cmin 11447  ccj 15154  cim 15156  abscabs 15292
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-rep 5237  ax-sep 5256  ax-nul 5268  ax-pr 5403  ax-un 7734  ax-cnex 11162  ax-1cn 11164  ax-icn 11165  ax-addcl 11166  ax-mulcl 11168  ax-i2m1 11174
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1103  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-nf 1813  df-sb 2096  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3079  df-rex 3089  df-reu 3369  df-rab 3416  df-v 3456  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-iun 4957  df-br 5109  df-opab 5173  df-mpt 5192  df-tr 5218  df-id 5555  df-eprel 5560  df-po 5568  df-so 5569  df-fr 5613  df-we 5615  df-xp 5666  df-rel 5667  df-cnv 5668  df-co 5669  df-dm 5670  df-rn 5671  df-res 5672  df-ima 5673  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-ov 7415  df-om 7861  df-2nd 7985  df-frecs 8276  df-wrecs 8307  df-recs 8356  df-rdg 8395
This theorem is used by:  constrsslem  34140  constrconj  34144  constrfin  34145  constrelextdg2  34146  constrextdg2lem  34147  constrext2chnlem  34149  constrcn  34159
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