Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > divcan8d | Structured version Visualization version GIF version |
Description: A cancellation law for division. (Contributed by Glauco Siliprandi, 5-Apr-2020.) |
Ref | Expression |
---|---|
divcan8d.a | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
divcan8d.b | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
divcan8d.a0 | ⊢ (𝜑 → 𝐴 ≠ 0) |
divcan8d.b0 | ⊢ (𝜑 → 𝐵 ≠ 0) |
Ref | Expression |
---|---|
divcan8d | ⊢ (𝜑 → (𝐵 / (𝐴 · 𝐵)) = (1 / 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | divcan8d.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
2 | divcan8d.a | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
3 | 2, 1 | mulcld 11075 | . . . 4 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℂ) |
4 | divcan8d.a0 | . . . . 5 ⊢ (𝜑 → 𝐴 ≠ 0) | |
5 | divcan8d.b0 | . . . . 5 ⊢ (𝜑 → 𝐵 ≠ 0) | |
6 | 2, 1, 4, 5 | mulne0d 11707 | . . . 4 ⊢ (𝜑 → (𝐴 · 𝐵) ≠ 0) |
7 | 2, 1, 6 | mulne0bbd 11711 | . . . 4 ⊢ (𝜑 → 𝐵 ≠ 0) |
8 | 1, 3, 1, 6, 7 | divcan7d 11859 | . . 3 ⊢ (𝜑 → ((𝐵 / 𝐵) / ((𝐴 · 𝐵) / 𝐵)) = (𝐵 / (𝐴 · 𝐵))) |
9 | 8 | eqcomd 2743 | . 2 ⊢ (𝜑 → (𝐵 / (𝐴 · 𝐵)) = ((𝐵 / 𝐵) / ((𝐴 · 𝐵) / 𝐵))) |
10 | 1, 5 | dividd 11829 | . . 3 ⊢ (𝜑 → (𝐵 / 𝐵) = 1) |
11 | 2, 1, 5 | divcan4d 11837 | . . 3 ⊢ (𝜑 → ((𝐴 · 𝐵) / 𝐵) = 𝐴) |
12 | 10, 11 | oveq12d 7335 | . 2 ⊢ (𝜑 → ((𝐵 / 𝐵) / ((𝐴 · 𝐵) / 𝐵)) = (1 / 𝐴)) |
13 | eqidd 2738 | . 2 ⊢ (𝜑 → (1 / 𝐴) = (1 / 𝐴)) | |
14 | 9, 12, 13 | 3eqtrd 2781 | 1 ⊢ (𝜑 → (𝐵 / (𝐴 · 𝐵)) = (1 / 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2105 ≠ wne 2941 (class class class)co 7317 ℂcc 10949 0cc0 10951 1c1 10952 · cmul 10956 / cdiv 11712 |
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 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2708 ax-sep 5238 ax-nul 5245 ax-pow 5303 ax-pr 5367 ax-un 7630 ax-resscn 11008 ax-1cn 11009 ax-icn 11010 ax-addcl 11011 ax-addrcl 11012 ax-mulcl 11013 ax-mulrcl 11014 ax-mulcom 11015 ax-addass 11016 ax-mulass 11017 ax-distr 11018 ax-i2m1 11019 ax-1ne0 11020 ax-1rid 11021 ax-rnegex 11022 ax-rrecex 11023 ax-cnre 11024 ax-pre-lttri 11025 ax-pre-lttrn 11026 ax-pre-ltadd 11027 ax-pre-mulgt0 11028 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3350 df-reu 3351 df-rab 3405 df-v 3443 df-sbc 3727 df-csb 3843 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4268 df-if 4472 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4851 df-br 5088 df-opab 5150 df-mpt 5171 df-id 5507 df-po 5521 df-so 5522 df-xp 5614 df-rel 5615 df-cnv 5616 df-co 5617 df-dm 5618 df-rn 5619 df-res 5620 df-ima 5621 df-iota 6418 df-fun 6468 df-fn 6469 df-f 6470 df-f1 6471 df-fo 6472 df-f1o 6473 df-fv 6474 df-riota 7274 df-ov 7320 df-oprab 7321 df-mpo 7322 df-er 8548 df-en 8784 df-dom 8785 df-sdom 8786 df-pnf 11091 df-mnf 11092 df-xr 11093 df-ltxr 11094 df-le 11095 df-sub 11287 df-neg 11288 df-div 11713 |
This theorem is referenced by: dvnxpaek 43733 |
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