| 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 11166 | . . 3 ⊢ (𝜑 → (𝐵 · 𝐶) ∈ ℂ) |
| 5 | dmmcand.bn0 | . . 3 ⊢ (𝜑 → 𝐵 ≠ 0) | |
| 6 | 1, 2, 4, 5 | div32d 11954 | . 2 ⊢ (𝜑 → ((𝐴 / 𝐵) · (𝐵 · 𝐶)) = (𝐴 · ((𝐵 · 𝐶) / 𝐵))) |
| 7 | 3, 2, 5 | divcan3d 11936 | . . 3 ⊢ (𝜑 → ((𝐵 · 𝐶) / 𝐵) = 𝐶) |
| 8 | 7 | oveq2d 7386 | . 2 ⊢ (𝜑 → (𝐴 · ((𝐵 · 𝐶) / 𝐵)) = (𝐴 · 𝐶)) |
| 9 | eqidd 2738 | . 2 ⊢ (𝜑 → (𝐴 · 𝐶) = (𝐴 · 𝐶)) | |
| 10 | 6, 8, 9 | 3eqtrd 2776 | 1 ⊢ (𝜑 → ((𝐴 / 𝐵) · (𝐵 · 𝐶)) = (𝐴 · 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7370 ℂcc 11038 0cc0 11040 · cmul 11045 / cdiv 11808 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5529 df-po 5542 df-so 5543 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-div 11809 |
| This theorem is referenced by: dvnprodlem2 46334 |
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