| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dmmcand | Structured version Visualization version GIF version | ||
| Description: Cancellation law for division and multiplication. (Contributed by Glauco Siliprandi, 5-Apr-2020.) |
| Ref | Expression |
|---|---|
| dmmcand.a | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| dmmcand.b | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| dmmcand.c | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| dmmcand.bn0 | ⊢ (𝜑 → 𝐵 ≠ 0) |
| Ref | Expression |
|---|---|
| dmmcand | ⊢ (𝜑 → ((𝐴 / 𝐵) · (𝐵 · 𝐶)) = (𝐴 · 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmcand.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | dmmcand.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 3 | dmmcand.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 4 | 2, 3 | mulcld 11231 | . . 3 ⊢ (𝜑 → (𝐵 · 𝐶) ∈ ℂ) |
| 5 | dmmcand.bn0 | . . 3 ⊢ (𝜑 → 𝐵 ≠ 0) | |
| 6 | 1, 2, 4, 5 | div32d 12016 | . 2 ⊢ (𝜑 → ((𝐴 / 𝐵) · (𝐵 · 𝐶)) = (𝐴 · ((𝐵 · 𝐶) / 𝐵))) |
| 7 | 3, 2, 5 | divcan3d 11998 | . . 3 ⊢ (𝜑 → ((𝐵 · 𝐶) / 𝐵) = 𝐶) |
| 8 | 7 | oveq2d 7429 | . 2 ⊢ (𝜑 → (𝐴 · ((𝐵 · 𝐶) / 𝐵)) = (𝐴 · 𝐶)) |
| 9 | eqidd 2770 | . 2 ⊢ (𝜑 → (𝐴 · 𝐶) = (𝐴 · 𝐶)) | |
| 10 | 6, 8, 9 | 3eqtrd 2808 | 1 ⊢ (𝜑 → ((𝐴 / 𝐵) · (𝐵 · 𝐶)) = (𝐴 · 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 (class class class)co 7413 ℂcc 11100 0cc0 11102 · cmul 11107 / cdiv 11873 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5273 ax-pow 5339 ax-pr 5407 ax-un 7735 ax-resscn 11159 ax-1cn 11160 ax-icn 11161 ax-addcl 11162 ax-addrcl 11163 ax-mulcl 11164 ax-mulrcl 11165 ax-mulcom 11166 ax-addass 11167 ax-mulass 11168 ax-distr 11169 ax-i2m1 11170 ax-1ne0 11171 ax-1rid 11172 ax-rnegex 11173 ax-rrecex 11174 ax-cnre 11175 ax-pre-lttri 11176 ax-pre-lttrn 11177 ax-pre-ltadd 11178 ax-pre-mulgt0 11179 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5559 df-po 5572 df-so 5573 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11445 df-neg 11446 df-div 11874 |
| This theorem is referenced by: dvnprodlem2 46590 |
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