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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 11459 | . 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 2145 (class class class)co 7412 ℂcc 11179 · cmul 11186 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-mulcl 11243 ax-mulcom 11245 ax-mulass 11247 |
| 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 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-iota 6487 df-fv 6539 df-ov 7415 |
| This theorem is used by: remullem 15275 absmul 15441 binomrisefac 16188 cosadd 16313 tanadd 16315 eulerthlem2 16939 mul4sqlem 17111 odadd2 20043 itgmulc2 26134 plymullem1 26513 chordthmlem4 27145 heron 27148 quartlem1 27167 dchrmulcl 27558 bposlem9 27601 lgsdir 27641 lgsdi 27643 lgsquad2lem1 27693 chtppilimlem1 27782 rplogsumlem1 27793 dchrvmasumlem1 27804 dchrvmasum2lem 27805 chpdifbndlem1 27862 pntlemf 27914 flt4lem5e 27968 brbtwn2 29465 colinearalglem4 29469 binom2subadd 33315 zringfrac 34068 constrmulcl 34385 madjusmdetlem4 34444 hgt750lemf 35265 hgt750leme 35270 circum 36408 itgmulc2nc 38574 pellexlem6 43794 pell1234qrmulcl 43815 rmxyadd 43881 wallispi2lem2 47026 dirkertrigeqlem3 47054 cevathlem1 47821 sin5tlem1 47863 sin5tlem4 47866 itsclc0xyqsolr 49825 |
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