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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 11193 be used later. Instead, use mulcom 11215. (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 11156 | . 2 ⊢ ℂ = ((R × R) / ◡ E ) | |
| 2 | mulcnsrec 11158 | . 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 11158 | . 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 11103 | . . 3 ⊢ (𝑥 ·R 𝑧) = (𝑧 ·R 𝑥) | |
| 5 | mulcomsr 11103 | . . . 4 ⊢ (𝑦 ·R 𝑤) = (𝑤 ·R 𝑦) | |
| 6 | 5 | oveq2i 7416 | . . 3 ⊢ (-1R ·R (𝑦 ·R 𝑤)) = (-1R ·R (𝑤 ·R 𝑦)) |
| 7 | 4, 6 | oveq12i 7417 | . 2 ⊢ ((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) = ((𝑧 ·R 𝑥) +R (-1R ·R (𝑤 ·R 𝑦))) |
| 8 | mulcomsr 11103 | . . . 4 ⊢ (𝑦 ·R 𝑧) = (𝑧 ·R 𝑦) | |
| 9 | mulcomsr 11103 | . . . 4 ⊢ (𝑥 ·R 𝑤) = (𝑤 ·R 𝑥) | |
| 10 | 8, 9 | oveq12i 7417 | . . 3 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) |
| 11 | addcomsr 11101 | . . 3 ⊢ ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) | |
| 12 | 10, 11 | eqtri 2758 | . 2 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) |
| 13 | 1, 2, 3, 7, 12 | ecovcom 8837 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 E cep 5552 ◡ccnv 5653 (class class class)co 7405 Rcnr 10879 -1Rcm1r 10882 +R cplr 10883 ·R cmr 10884 ℂcc 11127 · cmul 11134 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-inf2 9655 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-int 4923 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7862 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-oadd 8484 df-omul 8485 df-er 8719 df-ec 8721 df-qs 8725 df-ni 10886 df-pli 10887 df-mi 10888 df-lti 10889 df-plpq 10922 df-mpq 10923 df-ltpq 10924 df-enq 10925 df-nq 10926 df-erq 10927 df-plq 10928 df-mq 10929 df-1nq 10930 df-rq 10931 df-ltnq 10932 df-np 10995 df-plp 10997 df-mp 10998 df-ltp 10999 df-enr 11069 df-nr 11070 df-plr 11071 df-mr 11072 df-c 11135 df-mul 11141 |
| This theorem is referenced by: (None) |
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