Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > mul12 | Structured version Visualization version GIF version |
Description: Commutative/associative law for multiplication. (Contributed by NM, 30-Apr-2005.) |
Ref | Expression |
---|---|
mul12 | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · (𝐵 · 𝐶)) = (𝐵 · (𝐴 · 𝐶))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mulcom 10611 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴)) | |
2 | 1 | oveq1d 7160 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐴 · 𝐵) · 𝐶) = ((𝐵 · 𝐴) · 𝐶)) |
3 | 2 | 3adant3 1124 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 · 𝐵) · 𝐶) = ((𝐵 · 𝐴) · 𝐶)) |
4 | mulass 10613 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 · 𝐵) · 𝐶) = (𝐴 · (𝐵 · 𝐶))) | |
5 | mulass 10613 | . . 3 ⊢ ((𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐵 · 𝐴) · 𝐶) = (𝐵 · (𝐴 · 𝐶))) | |
6 | 5 | 3com12 1115 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐵 · 𝐴) · 𝐶) = (𝐵 · (𝐴 · 𝐶))) |
7 | 3, 4, 6 | 3eqtr3d 2861 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · (𝐵 · 𝐶)) = (𝐵 · (𝐴 · 𝐶))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1079 = wceq 1528 ∈ wcel 2105 (class class class)co 7145 ℂcc 10523 · cmul 10530 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-mulcom 10589 ax-mulass 10591 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-rex 3141 df-rab 3144 df-v 3494 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4831 df-br 5058 df-iota 6307 df-fv 6356 df-ov 7148 |
This theorem is referenced by: mul02 10806 mul12i 10823 mul12d 10837 mulre 14468 sqreulem 14707 fsumcube 15402 demoivre 15541 demoivreALT 15542 dvdscmul 15624 dvdscmulr 15626 dvdstr 15634 ablfacrp 19117 nmoleub2lem3 23646 sinperlem 24993 coskpi 25035 sineq0 25036 efif1olem4 25056 rpvmasum2 26015 expgrowthi 40542 |
Copyright terms: Public domain | W3C validator |