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| Mirrors > Home > MPE Home > Th. List > Mathboxes > int-mulcomd | Structured version Visualization version GIF version | ||
| Description: MultiplicationCommutativity generator rule. (Contributed by Stanislas Polu, 7-Apr-2020.) |
| Ref | Expression |
|---|---|
| int-mulcomd.1 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| int-mulcomd.2 | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| int-mulcomd.3 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| int-mulcomd | ⊢ (𝜑 → (𝐵 · 𝐶) = (𝐶 · 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | int-mulcomd.1 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 2 | 1 | recnd 11150 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 3 | int-mulcomd.2 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 4 | 3 | recnd 11150 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 5 | 2, 4 | mulcomd 11143 | . 2 ⊢ (𝜑 → (𝐵 · 𝐶) = (𝐶 · 𝐵)) |
| 6 | int-mulcomd.3 | . . . 4 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 7 | 6 | eqcomd 2739 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐴) |
| 8 | 7 | oveq2d 7371 | . 2 ⊢ (𝜑 → (𝐶 · 𝐵) = (𝐶 · 𝐴)) |
| 9 | 5, 8 | eqtrd 2768 | 1 ⊢ (𝜑 → (𝐵 · 𝐶) = (𝐶 · 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 (class class class)co 7355 ℝcr 11015 · cmul 11021 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2705 ax-resscn 11073 ax-mulcom 11080 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2712 df-cleq 2725 df-clel 2808 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4285 df-if 4477 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-iota 6445 df-fv 6497 df-ov 7358 |
| This theorem is referenced by: (None) |
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