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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rediv23d | Structured version Visualization version GIF version | ||
| Description: A "commutative"/associative law for division. (Contributed by SN, 9-Apr-2026.) |
| Ref | Expression |
|---|---|
| rediv23d.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| rediv23d.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| rediv23d.c | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| rediv23d.z | ⊢ (𝜑 → 𝐶 ≠ 0) |
| Ref | Expression |
|---|---|
| rediv23d | ⊢ (𝜑 → ((𝐴 · 𝐵) /ℝ 𝐶) = ((𝐴 /ℝ 𝐶) · 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rediv23d.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 2 | rediv23d.z | . . . . 5 ⊢ (𝜑 → 𝐶 ≠ 0) | |
| 3 | 1, 2 | sn-rereccld 42933 | . . . 4 ⊢ (𝜑 → (1 /ℝ 𝐶) ∈ ℝ) |
| 4 | 3 | recnd 11171 | . . 3 ⊢ (𝜑 → (1 /ℝ 𝐶) ∈ ℂ) |
| 5 | rediv23d.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 6 | 5 | recnd 11171 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 7 | rediv23d.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 8 | 7 | recnd 11171 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 9 | 4, 6, 8 | mulassd 11166 | . 2 ⊢ (𝜑 → (((1 /ℝ 𝐶) · 𝐴) · 𝐵) = ((1 /ℝ 𝐶) · (𝐴 · 𝐵))) |
| 10 | 5, 1, 2 | redivrec2d 42938 | . . 3 ⊢ (𝜑 → (𝐴 /ℝ 𝐶) = ((1 /ℝ 𝐶) · 𝐴)) |
| 11 | 10 | oveq1d 7378 | . 2 ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) · 𝐵) = (((1 /ℝ 𝐶) · 𝐴) · 𝐵)) |
| 12 | 5, 7 | remulcld 11173 | . . 3 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℝ) |
| 13 | 12, 1, 2 | redivrec2d 42938 | . 2 ⊢ (𝜑 → ((𝐴 · 𝐵) /ℝ 𝐶) = ((1 /ℝ 𝐶) · (𝐴 · 𝐵))) |
| 14 | 9, 11, 13 | 3eqtr4rd 2786 | 1 ⊢ (𝜑 → ((𝐴 · 𝐵) /ℝ 𝐶) = ((𝐴 /ℝ 𝐶) · 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∈ wcel 2119 ≠ wne 2935 (class class class)co 7363 ℝcr 11035 0cc0 11036 1c1 11037 · cmul 11041 /ℝ crediv 42918 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-ltxr 11182 df-2 12242 df-3 12243 df-resub 42844 df-rediv 42919 |
| This theorem is referenced by: (None) |
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