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Theorem axmulcl 7096
Description: Closure law for multiplication of complex numbers. Axiom for real and complex numbers, derived from set theory. This construction-dependent theorem should not be referenced directly, nor should the proven axiom ax-mulcl 7136 be used later. Instead, in most cases use mulcl 7162. (Contributed by NM, 10-Aug-1995.) (New usage is discouraged.)
Assertion
Ref Expression
axmulcl ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) ∈ ℂ)

Proof of Theorem axmulcl
Dummy variables 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elxpi 4387 . . . . 5 (𝐴 ∈ (R × R) → ∃𝑥𝑦(𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)))
2 df-c 7049 . . . . 5 ℂ = (R × R)
31, 2eleq2s 2174 . . . 4 (𝐴 ∈ ℂ → ∃𝑥𝑦(𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)))
4 elxpi 4387 . . . . 5 (𝐵 ∈ (R × R) → ∃𝑧𝑤(𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R)))
54, 2eleq2s 2174 . . . 4 (𝐵 ∈ ℂ → ∃𝑧𝑤(𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R)))
63, 5anim12i 331 . . 3 ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (∃𝑥𝑦(𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ ∃𝑧𝑤(𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))))
7 ee4anv 1851 . . 3 (∃𝑥𝑦𝑧𝑤((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) ↔ (∃𝑥𝑦(𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ ∃𝑧𝑤(𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))))
86, 7sylibr 132 . 2 ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ∃𝑥𝑦𝑧𝑤((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))))
9 simpll 496 . . . . . . 7 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝐴 = ⟨𝑥, 𝑦⟩)
10 simprl 498 . . . . . . 7 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝐵 = ⟨𝑧, 𝑤⟩)
119, 10oveq12d 5561 . . . . . 6 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝐴 · 𝐵) = (⟨𝑥, 𝑦⟩ · ⟨𝑧, 𝑤⟩))
12 mulcnsr 7065 . . . . . . 7 (((𝑥R𝑦R) ∧ (𝑧R𝑤R)) → (⟨𝑥, 𝑦⟩ · ⟨𝑧, 𝑤⟩) = ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩)
1312ad2ant2l 492 . . . . . 6 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (⟨𝑥, 𝑦⟩ · ⟨𝑧, 𝑤⟩) = ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩)
1411, 13eqtrd 2114 . . . . 5 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝐴 · 𝐵) = ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩)
15 simplrl 502 . . . . . . . . 9 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝑥R)
16 simprrl 506 . . . . . . . . 9 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝑧R)
17 mulclsr 6993 . . . . . . . . 9 ((𝑥R𝑧R) → (𝑥 ·R 𝑧) ∈ R)
1815, 16, 17syl2anc 403 . . . . . . . 8 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝑥 ·R 𝑧) ∈ R)
19 m1r 6991 . . . . . . . . . 10 -1RR
2019a1i 9 . . . . . . . . 9 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → -1RR)
21 simplrr 503 . . . . . . . . . 10 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝑦R)
22 simprrr 507 . . . . . . . . . 10 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → 𝑤R)
23 mulclsr 6993 . . . . . . . . . 10 ((𝑦R𝑤R) → (𝑦 ·R 𝑤) ∈ R)
2421, 22, 23syl2anc 403 . . . . . . . . 9 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝑦 ·R 𝑤) ∈ R)
25 mulclsr 6993 . . . . . . . . 9 ((-1RR ∧ (𝑦 ·R 𝑤) ∈ R) → (-1R ·R (𝑦 ·R 𝑤)) ∈ R)
2620, 24, 25syl2anc 403 . . . . . . . 8 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (-1R ·R (𝑦 ·R 𝑤)) ∈ R)
27 addclsr 6992 . . . . . . . 8 (((𝑥 ·R 𝑧) ∈ R ∧ (-1R ·R (𝑦 ·R 𝑤)) ∈ R) → ((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) ∈ R)
2818, 26, 27syl2anc 403 . . . . . . 7 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → ((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) ∈ R)
29 mulclsr 6993 . . . . . . . . 9 ((𝑦R𝑧R) → (𝑦 ·R 𝑧) ∈ R)
3021, 16, 29syl2anc 403 . . . . . . . 8 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝑦 ·R 𝑧) ∈ R)
31 mulclsr 6993 . . . . . . . . 9 ((𝑥R𝑤R) → (𝑥 ·R 𝑤) ∈ R)
3215, 22, 31syl2anc 403 . . . . . . . 8 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝑥 ·R 𝑤) ∈ R)
33 addclsr 6992 . . . . . . . 8 (((𝑦 ·R 𝑧) ∈ R ∧ (𝑥 ·R 𝑤) ∈ R) → ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) ∈ R)
3430, 32, 33syl2anc 403 . . . . . . 7 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) ∈ R)
35 opelxpi 4402 . . . . . . 7 ((((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) ∈ R ∧ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) ∈ R) → ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩ ∈ (R × R))
3628, 34, 35syl2anc 403 . . . . . 6 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩ ∈ (R × R))
3736, 2syl6eleqr 2173 . . . . 5 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → ⟨((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))⟩ ∈ ℂ)
3814, 37eqeltrd 2156 . . . 4 (((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝐴 · 𝐵) ∈ ℂ)
3938exlimivv 1818 . . 3 (∃𝑧𝑤((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝐴 · 𝐵) ∈ ℂ)
4039exlimivv 1818 . 2 (∃𝑥𝑦𝑧𝑤((𝐴 = ⟨𝑥, 𝑦⟩ ∧ (𝑥R𝑦R)) ∧ (𝐵 = ⟨𝑧, 𝑤⟩ ∧ (𝑧R𝑤R))) → (𝐴 · 𝐵) ∈ ℂ)
418, 40syl 14 1 ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) ∈ ℂ)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 102   = wceq 1285  wex 1422  wcel 1434  cop 3409   × cxp 4369  (class class class)co 5543  Rcnr 6549  -1Rcm1r 6552   +R cplr 6553   ·R cmr 6554  cc 7041   · cmul 7048
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 577  ax-in2 578  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-13 1445  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2064  ax-coll 3901  ax-sep 3904  ax-nul 3912  ax-pow 3956  ax-pr 3972  ax-un 4196  ax-setind 4288  ax-iinf 4337
This theorem depends on definitions:  df-bi 115  df-dc 777  df-3or 921  df-3an 922  df-tru 1288  df-fal 1291  df-nf 1391  df-sb 1687  df-eu 1945  df-mo 1946  df-clab 2069  df-cleq 2075  df-clel 2078  df-nfc 2209  df-ne 2247  df-ral 2354  df-rex 2355  df-reu 2356  df-rab 2358  df-v 2604  df-sbc 2817  df-csb 2910  df-dif 2976  df-un 2978  df-in 2980  df-ss 2987  df-nul 3259  df-pw 3392  df-sn 3412  df-pr 3413  df-op 3415  df-uni 3610  df-int 3645  df-iun 3688  df-br 3794  df-opab 3848  df-mpt 3849  df-tr 3884  df-eprel 4052  df-id 4056  df-po 4059  df-iso 4060  df-iord 4129  df-on 4131  df-suc 4134  df-iom 4340  df-xp 4377  df-rel 4378  df-cnv 4379  df-co 4380  df-dm 4381  df-rn 4382  df-res 4383  df-ima 4384  df-iota 4897  df-fun 4934  df-fn 4935  df-f 4936  df-f1 4937  df-fo 4938  df-f1o 4939  df-fv 4940  df-ov 5546  df-oprab 5547  df-mpt2 5548  df-1st 5798  df-2nd 5799  df-recs 5954  df-irdg 6019  df-1o 6065  df-2o 6066  df-oadd 6069  df-omul 6070  df-er 6172  df-ec 6174  df-qs 6178  df-ni 6556  df-pli 6557  df-mi 6558  df-lti 6559  df-plpq 6596  df-mpq 6597  df-enq 6599  df-nqqs 6600  df-plqqs 6601  df-mqqs 6602  df-1nqqs 6603  df-rq 6604  df-ltnqqs 6605  df-enq0 6676  df-nq0 6677  df-0nq0 6678  df-plq0 6679  df-mq0 6680  df-inp 6718  df-i1p 6719  df-iplp 6720  df-imp 6721  df-enr 6965  df-nr 6966  df-plr 6967  df-mr 6968  df-m1r 6972  df-c 7049  df-mul 7055
This theorem is referenced by: (None)
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