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Theorem axcnre 10904
Description: A complex number can be expressed in terms of two reals. Definition 10-1.1(v) of [Gleason] p. 130. Axiom 17 of 22 for real and complex numbers, derived from ZF set theory. This construction-dependent theorem should not be referenced directly; instead, use ax-cnre 10928. (Contributed by NM, 13-May-1996.) (New usage is discouraged.)
Assertion
Ref Expression
axcnre (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦)))
Distinct variable group:   𝑥,𝑦,𝐴

Proof of Theorem axcnre
Dummy variables 𝑧 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-c 10861 . 2 ℂ = (R × R)
2 eqeq1 2743 . . 3 (⟨𝑧, 𝑤⟩ = 𝐴 → (⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦)) ↔ 𝐴 = (𝑥 + (i · 𝑦))))
322rexbidv 3230 . 2 (⟨𝑧, 𝑤⟩ = 𝐴 → (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦)) ↔ ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦))))
4 opelreal 10870 . . . . . 6 (⟨𝑧, 0R⟩ ∈ ℝ ↔ 𝑧R)
5 opelreal 10870 . . . . . 6 (⟨𝑤, 0R⟩ ∈ ℝ ↔ 𝑤R)
64, 5anbi12i 626 . . . . 5 ((⟨𝑧, 0R⟩ ∈ ℝ ∧ ⟨𝑤, 0R⟩ ∈ ℝ) ↔ (𝑧R𝑤R))
76biimpri 227 . . . 4 ((𝑧R𝑤R) → (⟨𝑧, 0R⟩ ∈ ℝ ∧ ⟨𝑤, 0R⟩ ∈ ℝ))
8 df-i 10864 . . . . . . . . 9 i = ⟨0R, 1R
98oveq1i 7278 . . . . . . . 8 (i · ⟨𝑤, 0R⟩) = (⟨0R, 1R⟩ · ⟨𝑤, 0R⟩)
10 0r 10820 . . . . . . . . . 10 0RR
11 1sr 10821 . . . . . . . . . . 11 1RR
12 mulcnsr 10876 . . . . . . . . . . 11 (((0RR ∧ 1RR) ∧ (𝑤R ∧ 0RR)) → (⟨0R, 1R⟩ · ⟨𝑤, 0R⟩) = ⟨((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))), ((1R ·R 𝑤) +R (0R ·R 0R))⟩)
1310, 11, 12mpanl12 698 . . . . . . . . . 10 ((𝑤R ∧ 0RR) → (⟨0R, 1R⟩ · ⟨𝑤, 0R⟩) = ⟨((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))), ((1R ·R 𝑤) +R (0R ·R 0R))⟩)
1410, 13mpan2 687 . . . . . . . . 9 (𝑤R → (⟨0R, 1R⟩ · ⟨𝑤, 0R⟩) = ⟨((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))), ((1R ·R 𝑤) +R (0R ·R 0R))⟩)
15 mulcomsr 10829 . . . . . . . . . . . . 13 (0R ·R 𝑤) = (𝑤 ·R 0R)
16 00sr 10839 . . . . . . . . . . . . 13 (𝑤R → (𝑤 ·R 0R) = 0R)
1715, 16eqtrid 2791 . . . . . . . . . . . 12 (𝑤R → (0R ·R 𝑤) = 0R)
1817oveq1d 7283 . . . . . . . . . . 11 (𝑤R → ((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))) = (0R +R (-1R ·R (1R ·R 0R))))
19 00sr 10839 . . . . . . . . . . . . . . . 16 (1RR → (1R ·R 0R) = 0R)
2011, 19ax-mp 5 . . . . . . . . . . . . . . 15 (1R ·R 0R) = 0R
2120oveq2i 7279 . . . . . . . . . . . . . 14 (-1R ·R (1R ·R 0R)) = (-1R ·R 0R)
22 m1r 10822 . . . . . . . . . . . . . . 15 -1RR
23 00sr 10839 . . . . . . . . . . . . . . 15 (-1RR → (-1R ·R 0R) = 0R)
2422, 23ax-mp 5 . . . . . . . . . . . . . 14 (-1R ·R 0R) = 0R
2521, 24eqtri 2767 . . . . . . . . . . . . 13 (-1R ·R (1R ·R 0R)) = 0R
2625oveq2i 7279 . . . . . . . . . . . 12 (0R +R (-1R ·R (1R ·R 0R))) = (0R +R 0R)
27 0idsr 10837 . . . . . . . . . . . . 13 (0RR → (0R +R 0R) = 0R)
2810, 27ax-mp 5 . . . . . . . . . . . 12 (0R +R 0R) = 0R
2926, 28eqtri 2767 . . . . . . . . . . 11 (0R +R (-1R ·R (1R ·R 0R))) = 0R
3018, 29eqtrdi 2795 . . . . . . . . . 10 (𝑤R → ((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))) = 0R)
31 mulcomsr 10829 . . . . . . . . . . . . 13 (1R ·R 𝑤) = (𝑤 ·R 1R)
32 1idsr 10838 . . . . . . . . . . . . 13 (𝑤R → (𝑤 ·R 1R) = 𝑤)
3331, 32eqtrid 2791 . . . . . . . . . . . 12 (𝑤R → (1R ·R 𝑤) = 𝑤)
3433oveq1d 7283 . . . . . . . . . . 11 (𝑤R → ((1R ·R 𝑤) +R (0R ·R 0R)) = (𝑤 +R (0R ·R 0R)))
35 00sr 10839 . . . . . . . . . . . . . 14 (0RR → (0R ·R 0R) = 0R)
3610, 35ax-mp 5 . . . . . . . . . . . . 13 (0R ·R 0R) = 0R
3736oveq2i 7279 . . . . . . . . . . . 12 (𝑤 +R (0R ·R 0R)) = (𝑤 +R 0R)
38 0idsr 10837 . . . . . . . . . . . 12 (𝑤R → (𝑤 +R 0R) = 𝑤)
3937, 38eqtrid 2791 . . . . . . . . . . 11 (𝑤R → (𝑤 +R (0R ·R 0R)) = 𝑤)
4034, 39eqtrd 2779 . . . . . . . . . 10 (𝑤R → ((1R ·R 𝑤) +R (0R ·R 0R)) = 𝑤)
4130, 40opeq12d 4817 . . . . . . . . 9 (𝑤R → ⟨((0R ·R 𝑤) +R (-1R ·R (1R ·R 0R))), ((1R ·R 𝑤) +R (0R ·R 0R))⟩ = ⟨0R, 𝑤⟩)
4214, 41eqtrd 2779 . . . . . . . 8 (𝑤R → (⟨0R, 1R⟩ · ⟨𝑤, 0R⟩) = ⟨0R, 𝑤⟩)
439, 42eqtrid 2791 . . . . . . 7 (𝑤R → (i · ⟨𝑤, 0R⟩) = ⟨0R, 𝑤⟩)
4443oveq2d 7284 . . . . . 6 (𝑤R → (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)) = (⟨𝑧, 0R⟩ + ⟨0R, 𝑤⟩))
4544adantl 481 . . . . 5 ((𝑧R𝑤R) → (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)) = (⟨𝑧, 0R⟩ + ⟨0R, 𝑤⟩))
46 addcnsr 10875 . . . . . . 7 (((𝑧R ∧ 0RR) ∧ (0RR𝑤R)) → (⟨𝑧, 0R⟩ + ⟨0R, 𝑤⟩) = ⟨(𝑧 +R 0R), (0R +R 𝑤)⟩)
4710, 46mpanl2 697 . . . . . 6 ((𝑧R ∧ (0RR𝑤R)) → (⟨𝑧, 0R⟩ + ⟨0R, 𝑤⟩) = ⟨(𝑧 +R 0R), (0R +R 𝑤)⟩)
4810, 47mpanr1 699 . . . . 5 ((𝑧R𝑤R) → (⟨𝑧, 0R⟩ + ⟨0R, 𝑤⟩) = ⟨(𝑧 +R 0R), (0R +R 𝑤)⟩)
49 0idsr 10837 . . . . . 6 (𝑧R → (𝑧 +R 0R) = 𝑧)
50 addcomsr 10827 . . . . . . 7 (0R +R 𝑤) = (𝑤 +R 0R)
5150, 38eqtrid 2791 . . . . . 6 (𝑤R → (0R +R 𝑤) = 𝑤)
52 opeq12 4811 . . . . . 6 (((𝑧 +R 0R) = 𝑧 ∧ (0R +R 𝑤) = 𝑤) → ⟨(𝑧 +R 0R), (0R +R 𝑤)⟩ = ⟨𝑧, 𝑤⟩)
5349, 51, 52syl2an 595 . . . . 5 ((𝑧R𝑤R) → ⟨(𝑧 +R 0R), (0R +R 𝑤)⟩ = ⟨𝑧, 𝑤⟩)
5445, 48, 533eqtrrd 2784 . . . 4 ((𝑧R𝑤R) → ⟨𝑧, 𝑤⟩ = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)))
55 opex 5381 . . . . 5 𝑧, 0R⟩ ∈ V
56 opex 5381 . . . . 5 𝑤, 0R⟩ ∈ V
57 eleq1 2827 . . . . . . 7 (𝑥 = ⟨𝑧, 0R⟩ → (𝑥 ∈ ℝ ↔ ⟨𝑧, 0R⟩ ∈ ℝ))
58 eleq1 2827 . . . . . . 7 (𝑦 = ⟨𝑤, 0R⟩ → (𝑦 ∈ ℝ ↔ ⟨𝑤, 0R⟩ ∈ ℝ))
5957, 58bi2anan9 635 . . . . . 6 ((𝑥 = ⟨𝑧, 0R⟩ ∧ 𝑦 = ⟨𝑤, 0R⟩) → ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ↔ (⟨𝑧, 0R⟩ ∈ ℝ ∧ ⟨𝑤, 0R⟩ ∈ ℝ)))
60 oveq1 7275 . . . . . . . 8 (𝑥 = ⟨𝑧, 0R⟩ → (𝑥 + (i · 𝑦)) = (⟨𝑧, 0R⟩ + (i · 𝑦)))
61 oveq2 7276 . . . . . . . . 9 (𝑦 = ⟨𝑤, 0R⟩ → (i · 𝑦) = (i · ⟨𝑤, 0R⟩))
6261oveq2d 7284 . . . . . . . 8 (𝑦 = ⟨𝑤, 0R⟩ → (⟨𝑧, 0R⟩ + (i · 𝑦)) = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)))
6360, 62sylan9eq 2799 . . . . . . 7 ((𝑥 = ⟨𝑧, 0R⟩ ∧ 𝑦 = ⟨𝑤, 0R⟩) → (𝑥 + (i · 𝑦)) = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)))
6463eqeq2d 2750 . . . . . 6 ((𝑥 = ⟨𝑧, 0R⟩ ∧ 𝑦 = ⟨𝑤, 0R⟩) → (⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦)) ↔ ⟨𝑧, 𝑤⟩ = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩))))
6559, 64anbi12d 630 . . . . 5 ((𝑥 = ⟨𝑧, 0R⟩ ∧ 𝑦 = ⟨𝑤, 0R⟩) → (((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦))) ↔ ((⟨𝑧, 0R⟩ ∈ ℝ ∧ ⟨𝑤, 0R⟩ ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩)))))
6655, 56, 65spc2ev 3544 . . . 4 (((⟨𝑧, 0R⟩ ∈ ℝ ∧ ⟨𝑤, 0R⟩ ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (⟨𝑧, 0R⟩ + (i · ⟨𝑤, 0R⟩))) → ∃𝑥𝑦((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦))))
677, 54, 66syl2anc 583 . . 3 ((𝑧R𝑤R) → ∃𝑥𝑦((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦))))
68 r2ex 3233 . . 3 (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦)) ↔ ∃𝑥𝑦((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) ∧ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦))))
6967, 68sylibr 233 . 2 ((𝑧R𝑤R) → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ ⟨𝑧, 𝑤⟩ = (𝑥 + (i · 𝑦)))
701, 3, 69optocl 5679 1 (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1541  wex 1785  wcel 2109  wrex 3066  cop 4572  (class class class)co 7268  Rcnr 10605  0Rc0r 10606  1Rc1r 10607  -1Rcm1r 10608   +R cplr 10609   ·R cmr 10610  cc 10853  cr 10854  ici 10857   + caddc 10858   · cmul 10860
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-10 2140  ax-11 2157  ax-12 2174  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pow 5291  ax-pr 5355  ax-un 7579  ax-inf2 9360
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-nf 1790  df-sb 2071  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2817  df-nfc 2890  df-ne 2945  df-ral 3070  df-rex 3071  df-reu 3072  df-rmo 3073  df-rab 3074  df-v 3432  df-sbc 3720  df-csb 3837  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-pss 3910  df-nul 4262  df-if 4465  df-pw 4540  df-sn 4567  df-pr 4569  df-tp 4571  df-op 4573  df-uni 4845  df-int 4885  df-iun 4931  df-br 5079  df-opab 5141  df-mpt 5162  df-tr 5196  df-id 5488  df-eprel 5494  df-po 5502  df-so 5503  df-fr 5543  df-we 5545  df-xp 5594  df-rel 5595  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-res 5600  df-ima 5601  df-pred 6199  df-ord 6266  df-on 6267  df-lim 6268  df-suc 6269  df-iota 6388  df-fun 6432  df-fn 6433  df-f 6434  df-f1 6435  df-fo 6436  df-f1o 6437  df-fv 6438  df-ov 7271  df-oprab 7272  df-mpo 7273  df-om 7701  df-1st 7817  df-2nd 7818  df-frecs 8081  df-wrecs 8112  df-recs 8186  df-rdg 8225  df-1o 8281  df-oadd 8285  df-omul 8286  df-er 8472  df-ec 8474  df-qs 8478  df-ni 10612  df-pli 10613  df-mi 10614  df-lti 10615  df-plpq 10648  df-mpq 10649  df-ltpq 10650  df-enq 10651  df-nq 10652  df-erq 10653  df-plq 10654  df-mq 10655  df-1nq 10656  df-rq 10657  df-ltnq 10658  df-np 10721  df-1p 10722  df-plp 10723  df-mp 10724  df-ltp 10725  df-enr 10795  df-nr 10796  df-plr 10797  df-mr 10798  df-0r 10800  df-1r 10801  df-m1r 10802  df-c 10861  df-i 10864  df-r 10865  df-add 10866  df-mul 10867
This theorem is referenced by: (None)
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