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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 10797 | . 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 1538 ∈ wcel 2111 (class class class)co 7135 ℂcc 10524 · cmul 10531 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 ax-mulcl 10588 ax-mulcom 10590 ax-mulass 10592 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-un 3886 df-in 3888 df-ss 3898 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-iota 6283 df-fv 6332 df-ov 7138 |
This theorem is referenced by: remullem 14479 absmul 14646 binomrisefac 15388 cosadd 15510 tanadd 15512 eulerthlem2 16109 mul4sqlem 16279 odadd2 18962 itgmulc2 24437 plymullem1 24811 chordthmlem4 25421 heron 25424 quartlem1 25443 dchrmulcl 25833 bposlem9 25876 lgsdir 25916 lgsdi 25918 lgsquad2lem1 25968 chtppilimlem1 26057 rplogsumlem1 26068 dchrvmasumlem1 26079 dchrvmasum2lem 26080 chpdifbndlem1 26137 pntlemf 26189 brbtwn2 26699 colinearalglem4 26703 madjusmdetlem4 31183 hgt750lemf 32034 hgt750leme 32039 circum 33030 itgmulc2nc 35125 pellexlem6 39775 pell1234qrmulcl 39796 rmxyadd 39862 wallispi2lem2 42714 dirkertrigeqlem3 42742 cevathlem1 43481 itsclc0xyqsolr 45183 |
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