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| Mirrors > Home > MPE Home > Th. List > mul4d | Structured version Visualization version GIF version | ||
| Description: Rearrangement of 4 factors. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| muld.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| addcomd.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| addcand.3 | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| mul4d.4 | ⊢ (𝜑 → 𝐷 ∈ ℂ) |
| Ref | Expression |
|---|---|
| mul4d | ⊢ (𝜑 → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | muld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | addcomd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 3 | addcand.3 | . 2 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 4 | mul4d.4 | . 2 ⊢ (𝜑 → 𝐷 ∈ ℂ) | |
| 5 | mul4 11366 | . 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 851 | 1 ⊢ (𝜑 → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 (class class class)co 7400 ℂcc 11086 · cmul 11093 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 ax-mulcl 11150 ax-mulcom 11152 ax-mulass 11154 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-iota 6481 df-fv 6533 df-ov 7403 |
| This theorem is referenced by: remullem 15167 absmul 15333 binomrisefac 16084 cosadd 16209 tanadd 16211 eulerthlem2 16829 mul4sqlem 17001 odadd2 19907 itgmulc2 25950 plymullem1 26328 chordthmlem4 26954 heron 26957 quartlem1 26976 dchrmulcl 27367 bposlem9 27410 lgsdir 27450 lgsdi 27452 lgsquad2lem1 27502 chtppilimlem1 27591 rplogsumlem1 27602 dchrvmasumlem1 27613 dchrvmasum2lem 27614 chpdifbndlem1 27671 pntlemf 27723 brbtwn2 29160 colinearalglem4 29164 binom2subadd 32994 zringfrac 33756 constrmulcl 34073 madjusmdetlem4 34132 hgt750lemf 34952 hgt750leme 34957 circum 36032 itgmulc2nc 38194 flt4lem5e 43245 pellexlem6 43418 pell1234qrmulcl 43439 rmxyadd 43505 wallispi2lem2 46645 dirkertrigeqlem3 46673 cevathlem1 47440 sin5tlem1 47466 sin5tlem4 47469 itsclc0xyqsolr 49401 |
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