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Mirrors > Home > MPE Home > Th. List > divcan3 | Structured version Visualization version GIF version |
Description: A cancellation law for division. (Contributed by NM, 3-Feb-2004.) (Proof shortened by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
divcan3 | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → ((𝐵 · 𝐴) / 𝐵) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2738 | . 2 ⊢ (𝐵 · 𝐴) = (𝐵 · 𝐴) | |
2 | simp2 1136 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → 𝐵 ∈ ℂ) | |
3 | simp1 1135 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → 𝐴 ∈ ℂ) | |
4 | 2, 3 | mulcld 10995 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 · 𝐴) ∈ ℂ) |
5 | 3simpc 1149 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) | |
6 | divmul 11636 | . . 3 ⊢ (((𝐵 · 𝐴) ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 ≠ 0)) → (((𝐵 · 𝐴) / 𝐵) = 𝐴 ↔ (𝐵 · 𝐴) = (𝐵 · 𝐴))) | |
7 | 4, 3, 5, 6 | syl3anc 1370 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (((𝐵 · 𝐴) / 𝐵) = 𝐴 ↔ (𝐵 · 𝐴) = (𝐵 · 𝐴))) |
8 | 1, 7 | mpbiri 257 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → ((𝐵 · 𝐴) / 𝐵) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 (class class class)co 7275 ℂcc 10869 0cc0 10871 · cmul 10876 / cdiv 11632 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 |
This theorem is referenced by: divcan4 11660 muldivdir 11668 subdivcomb1 11670 divmuldiv 11675 divcan3zi 11714 divcan3d 11756 ltdiv23 11866 lediv23 11867 2halves 12201 halfaddsub 12206 zdiv 12390 sqdivid 13842 reim 14820 crim 14826 cnpart 14951 absmax 15041 efival 15861 cosadd 15874 cosmul 15882 pythagtriplem12 16527 pythagtriplem14 16529 pythagtriplem15 16530 pythagtriplem16 16531 pythagtriplem17 16532 ovolunlem1a 24660 ovolunlem1 24661 efif1olem2 25699 cxpsqrtlem 25857 leibpilem2 26091 bcmax 26426 logdivsum 26681 ipidsq 29072 dpfrac1 31166 cos2h 35768 isbnd2 35941 lhe4.4ex1a 41947 ltdiv23neg 42934 2zrngnmrid 45508 |
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