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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 11189 | . 2 ⊢ (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) ∧ (𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ)) → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) | |
6 | 1, 2, 3, 4, 5 | syl22anc 837 | 1 ⊢ (𝜑 → ((𝐴 · 𝐵) · (𝐶 · 𝐷)) = ((𝐴 · 𝐶) · (𝐵 · 𝐷))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2104 (class class class)co 7307 ℂcc 10915 · cmul 10922 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-ext 2707 ax-mulcl 10979 ax-mulcom 10981 ax-mulass 10983 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-sb 2066 df-clab 2714 df-cleq 2728 df-clel 2814 df-rab 3287 df-v 3439 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-br 5082 df-iota 6410 df-fv 6466 df-ov 7310 |
This theorem is referenced by: remullem 14884 absmul 15051 binomrisefac 15797 cosadd 15919 tanadd 15921 eulerthlem2 16528 mul4sqlem 16699 odadd2 19495 itgmulc2 25043 plymullem1 25420 chordthmlem4 26030 heron 26033 quartlem1 26052 dchrmulcl 26442 bposlem9 26485 lgsdir 26525 lgsdi 26527 lgsquad2lem1 26577 chtppilimlem1 26666 rplogsumlem1 26677 dchrvmasumlem1 26688 dchrvmasum2lem 26689 chpdifbndlem1 26746 pntlemf 26798 brbtwn2 27318 colinearalglem4 27322 madjusmdetlem4 31825 hgt750lemf 32678 hgt750leme 32683 circum 33677 itgmulc2nc 35889 flt4lem5e 40530 pellexlem6 40693 pell1234qrmulcl 40714 rmxyadd 40781 wallispi2lem2 43662 dirkertrigeqlem3 43690 cevathlem1 44441 itsclc0xyqsolr 46173 |
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