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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 11238 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 3 | int-mulcomd.2 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 4 | 3 | recnd 11238 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 5 | 2, 4 | mulcomd 11231 | . 2 ⊢ (𝜑 → (𝐵 · 𝐶) = (𝐶 · 𝐵)) |
| 6 | int-mulcomd.3 | . . . 4 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 7 | 6 | eqcomd 2769 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐴) |
| 8 | 7 | oveq2d 7428 | . 2 ⊢ (𝜑 → (𝐶 · 𝐵) = (𝐶 · 𝐴)) |
| 9 | 5, 8 | eqtrd 2798 | 1 ⊢ (𝜑 → (𝐵 · 𝐶) = (𝐶 · 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 (class class class)co 7412 ℝcr 11100 · cmul 11106 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-resscn 11158 ax-mulcom 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-iota 6494 df-fv 6546 df-ov 7415 |
| This theorem is referenced by: (None) |
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