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Mirrors > Home > MPE Home > Th. List > axmulcom | Structured version Visualization version GIF version |
Description: Multiplication of complex numbers is commutative. Axiom 8 of 22 for real and complex numbers, derived from ZF set theory. This construction-dependent theorem should not be referenced directly, nor should the proven axiom ax-mulcom 11196 be used later. Instead, use mulcom 11218. (Contributed by NM, 31-Aug-1995.) (New usage is discouraged.) |
Ref | Expression |
---|---|
axmulcom | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfcnqs 11159 | . 2 ⊢ ℂ = ((R × R) / ◡ E ) | |
2 | mulcnsrec 11161 | . 2 ⊢ (((𝑥 ∈ R ∧ 𝑦 ∈ R) ∧ (𝑧 ∈ R ∧ 𝑤 ∈ R)) → ([〈𝑥, 𝑦〉]◡ E · [〈𝑧, 𝑤〉]◡ E ) = [〈((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))), ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤))〉]◡ E ) | |
3 | mulcnsrec 11161 | . 2 ⊢ (((𝑧 ∈ R ∧ 𝑤 ∈ R) ∧ (𝑥 ∈ R ∧ 𝑦 ∈ R)) → ([〈𝑧, 𝑤〉]◡ E · [〈𝑥, 𝑦〉]◡ E ) = [〈((𝑧 ·R 𝑥) +R (-1R ·R (𝑤 ·R 𝑦))), ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦))〉]◡ E ) | |
4 | mulcomsr 11106 | . . 3 ⊢ (𝑥 ·R 𝑧) = (𝑧 ·R 𝑥) | |
5 | mulcomsr 11106 | . . . 4 ⊢ (𝑦 ·R 𝑤) = (𝑤 ·R 𝑦) | |
6 | 5 | oveq2i 7425 | . . 3 ⊢ (-1R ·R (𝑦 ·R 𝑤)) = (-1R ·R (𝑤 ·R 𝑦)) |
7 | 4, 6 | oveq12i 7426 | . 2 ⊢ ((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) = ((𝑧 ·R 𝑥) +R (-1R ·R (𝑤 ·R 𝑦))) |
8 | mulcomsr 11106 | . . . 4 ⊢ (𝑦 ·R 𝑧) = (𝑧 ·R 𝑦) | |
9 | mulcomsr 11106 | . . . 4 ⊢ (𝑥 ·R 𝑤) = (𝑤 ·R 𝑥) | |
10 | 8, 9 | oveq12i 7426 | . . 3 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) |
11 | addcomsr 11104 | . . 3 ⊢ ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) | |
12 | 10, 11 | eqtri 2755 | . 2 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) |
13 | 1, 2, 3, 7, 12 | ecovcom 8835 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1534 ∈ wcel 2099 E cep 5575 ◡ccnv 5671 (class class class)co 7414 Rcnr 10882 -1Rcm1r 10885 +R cplr 10886 ·R cmr 10887 ℂcc 11130 · cmul 11137 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-inf2 9658 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-oadd 8484 df-omul 8485 df-er 8718 df-ec 8720 df-qs 8724 df-ni 10889 df-pli 10890 df-mi 10891 df-lti 10892 df-plpq 10925 df-mpq 10926 df-ltpq 10927 df-enq 10928 df-nq 10929 df-erq 10930 df-plq 10931 df-mq 10932 df-1nq 10933 df-rq 10934 df-ltnq 10935 df-np 10998 df-plp 11000 df-mp 11001 df-ltp 11002 df-enr 11072 df-nr 11073 df-plr 11074 df-mr 11075 df-c 11138 df-mul 11144 |
This theorem is referenced by: (None) |
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