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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 11132 be used later. Instead, use mulcom 11154. (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 11095 | . 2 ⊢ ℂ = ((R × R) / ◡ E ) | |
| 2 | mulcnsrec 11097 | . 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 11097 | . 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 11042 | . . 3 ⊢ (𝑥 ·R 𝑧) = (𝑧 ·R 𝑥) | |
| 5 | mulcomsr 11042 | . . . 4 ⊢ (𝑦 ·R 𝑤) = (𝑤 ·R 𝑦) | |
| 6 | 5 | oveq2i 7398 | . . 3 ⊢ (-1R ·R (𝑦 ·R 𝑤)) = (-1R ·R (𝑤 ·R 𝑦)) |
| 7 | 4, 6 | oveq12i 7399 | . 2 ⊢ ((𝑥 ·R 𝑧) +R (-1R ·R (𝑦 ·R 𝑤))) = ((𝑧 ·R 𝑥) +R (-1R ·R (𝑤 ·R 𝑦))) |
| 8 | mulcomsr 11042 | . . . 4 ⊢ (𝑦 ·R 𝑧) = (𝑧 ·R 𝑦) | |
| 9 | mulcomsr 11042 | . . . 4 ⊢ (𝑥 ·R 𝑤) = (𝑤 ·R 𝑥) | |
| 10 | 8, 9 | oveq12i 7399 | . . 3 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) |
| 11 | addcomsr 11040 | . . 3 ⊢ ((𝑧 ·R 𝑦) +R (𝑤 ·R 𝑥)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) | |
| 12 | 10, 11 | eqtri 2752 | . 2 ⊢ ((𝑦 ·R 𝑧) +R (𝑥 ·R 𝑤)) = ((𝑤 ·R 𝑥) +R (𝑧 ·R 𝑦)) |
| 13 | 1, 2, 3, 7, 12 | ecovcom 8796 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 E cep 5537 ◡ccnv 5637 (class class class)co 7387 Rcnr 10818 -1Rcm1r 10821 +R cplr 10822 ·R cmr 10823 ℂcc 11066 · cmul 11073 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-inf2 9594 |
| 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 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-oadd 8438 df-omul 8439 df-er 8671 df-ec 8673 df-qs 8677 df-ni 10825 df-pli 10826 df-mi 10827 df-lti 10828 df-plpq 10861 df-mpq 10862 df-ltpq 10863 df-enq 10864 df-nq 10865 df-erq 10866 df-plq 10867 df-mq 10868 df-1nq 10869 df-rq 10870 df-ltnq 10871 df-np 10934 df-plp 10936 df-mp 10937 df-ltp 10938 df-enr 11008 df-nr 11009 df-plr 11010 df-mr 11011 df-c 11074 df-mul 11080 |
| This theorem is referenced by: (None) |
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