Users' Mathboxes Mathbox for Thierry Arnoux < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  constr0 Structured version   Visualization version   GIF version

Theorem constr0 33750
Description: The first step of the construction of constructible numbers is the pair {0, 1}. In this theorem and the following, we use (𝐶𝑁) for the 𝑁-th intermediate iteration of the constructible number. (Contributed by Thierry Arnoux, 25-Jun-2025.)
Hypothesis
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})
Assertion
Ref Expression
constr0 (𝐶‘∅) = {0, 1}

Proof of Theorem constr0
StepHypRef Expression
1 constr0.1 . . 3 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})
21fveq1i 6823 . 2 (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})‘∅)
3 prex 5373 . . 3 {0, 1} ∈ V
43rdg0 8340 . 2 (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})‘∅) = {0, 1}
52, 4eqtri 2754 1 (𝐶‘∅) = {0, 1}
Colors of variables: wff setvar class
Syntax hints:  wa 395  w3o 1085  w3a 1086   = wceq 1541  wne 2928  wrex 3056  {crab 3395  Vcvv 3436  c0 4280  {cpr 4575  cmpt 5170  cfv 6481  (class class class)co 7346  reccrdg 8328  cc 11004  cr 11005  0cc0 11006  1c1 11007   + caddc 11009   · cmul 11011  cmin 11344  ccj 15003  cim 15005  abscabs 15141
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-sep 5232  ax-nul 5242  ax-pr 5368  ax-un 7668
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-ral 3048  df-rex 3057  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4281  df-if 4473  df-pw 4549  df-sn 4574  df-pr 4576  df-op 4580  df-uni 4857  df-iun 4941  df-br 5090  df-opab 5152  df-mpt 5171  df-tr 5197  df-id 5509  df-eprel 5514  df-po 5522  df-so 5523  df-fr 5567  df-we 5569  df-xp 5620  df-rel 5621  df-cnv 5622  df-co 5623  df-dm 5624  df-rn 5625  df-res 5626  df-ima 5627  df-pred 6248  df-ord 6309  df-on 6310  df-lim 6311  df-suc 6312  df-iota 6437  df-fun 6483  df-fn 6484  df-f 6485  df-f1 6486  df-fo 6487  df-f1o 6488  df-fv 6489  df-ov 7349  df-om 7797  df-2nd 7922  df-frecs 8211  df-wrecs 8242  df-recs 8291  df-rdg 8329
This theorem is referenced by:  constrsscn  33753  constr01  33755  constrconj  33758  constrfin  33759  constrextdg2  33762  nn0constr  33774
  Copyright terms: Public domain W3C validator