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| Mirrors > Home > ILE Home > Th. List > mul12d | GIF version | ||
| Description: Commutative/associative law that swaps the first two factors in a triple product. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| muld.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| addcomd.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| mul12d.3 | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| Ref | Expression |
|---|---|
| mul12d | ⊢ (𝜑 → (𝐴 · (𝐵 · 𝐶)) = (𝐵 · (𝐴 · 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | muld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | addcomd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 3 | mul12d.3 | . 2 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 4 | mul12 8208 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · (𝐵 · 𝐶)) = (𝐵 · (𝐴 · 𝐶))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1250 | 1 ⊢ (𝜑 → (𝐴 · (𝐵 · 𝐶)) = (𝐵 · (𝐴 · 𝐶))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1373 ∈ wcel 2177 (class class class)co 5951 ℂcc 7930 · cmul 7937 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2188 ax-mulcom 8033 ax-mulass 8035 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-rex 2491 df-v 2775 df-un 3171 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-br 4048 df-iota 5237 df-fv 5284 df-ov 5954 |
| This theorem is referenced by: mulreim 8684 divrecap 8768 remullem 11226 cvgratnnlemnexp 11879 cvgratnnlemmn 11880 tanval3ap 12069 sinadd 12091 dvdscmulr 12175 bezoutlemnewy 12361 dvdsmulgcd 12390 lcmgcdlem 12443 cncongr1 12469 prmdiv 12601 tangtx 15354 gausslemma2dlem6 15588 lgseisenlem2 15592 lgseisenlem4 15594 lgsquadlem1 15598 2sqlem4 15639 |
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