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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 11508 | . 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 852 | 1 ⊢ (𝜑 → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 (class class class)co 7446 ℂcc 11228 · cmul 11235 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-mulcl 11292 ax-mulcom 11294 ax-mulass 11296 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-iota 6515 df-fv 6569 df-ov 7449 |
| This theorem is used by: remullem 15327 absmul 15493 binomrisefac 16240 cosadd 16365 tanadd 16367 eulerthlem2 16991 mul4sqlem 17163 odadd2 20096 itgmulc2 26187 plymullem1 26566 chordthmlem4 27196 heron 27199 quartlem1 27218 dchrmulcl 27609 bposlem9 27652 lgsdir 27692 lgsdi 27694 lgsquad2lem1 27744 chtppilimlem1 27833 rplogsumlem1 27844 dchrvmasumlem1 27855 dchrvmasum2lem 27856 chpdifbndlem1 27913 pntlemf 27965 flt4lem5e 28019 brbtwn2 29516 colinearalglem4 29520 binom2subadd 33406 zringfrac 34169 constrmulcl 34486 madjusmdetlem4 34545 hgt750lemf 35365 hgt750leme 35370 circum 36619 itgmulc2nc 38811 pellexlem6 44045 pell1234qrmulcl 44066 rmxyadd 44132 wallispi2lem2 47297 dirkertrigeqlem3 47325 cevathlem1 48092 sin5tlem1 48134 sin5tlem4 48137 itsclc0xyqsolr 50096 coshadd 51139 |
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