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| Mirrors > Home > ILE Home > Th. List > mul32d | GIF version | ||
| Description: Commutative/associative law that swaps the last 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 |
|---|---|
| mul32d | ⊢ (𝜑 → ((𝐴 · 𝐵) · 𝐶) = ((𝐴 · 𝐶) · 𝐵)) |
| 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 | mul32 8309 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 · 𝐵) · 𝐶) = ((𝐴 · 𝐶) · 𝐵)) | |
| 5 | 1, 2, 3, 4 | syl3anc 1273 | 1 ⊢ (𝜑 → ((𝐴 · 𝐵) · 𝐶) = ((𝐴 · 𝐶) · 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∈ wcel 2202 (class class class)co 6018 ℂcc 8030 · cmul 8037 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-mulcom 8133 ax-mulass 8135 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6021 |
| This theorem is referenced by: conjmulap 8909 modqmul1 10640 binom3 10920 bernneq 10923 bcm1k 11023 bcp1n 11024 resqrexlemcalc1 11576 resqrexlemnm 11580 reccn2ap 11875 binomlem 12046 tanaddap 12302 eirraplem 12340 dvds2ln 12387 divgcdcoprm0 12675 modprm0 12829 binom4 15706 gausslemma2d 15801 lgsquadlem1 15809 2lgslem3b 15826 2lgslem3c 15827 2lgslem3d 15828 |
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