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Mirrors > Home > MPE Home > Th. List > cjdiv | Structured version Visualization version GIF version |
Description: Complex conjugate distributes over division. (Contributed by NM, 29-Apr-2005.) (Proof shortened by Mario Carneiro, 29-May-2016.) |
Ref | Expression |
---|---|
cjdiv | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘(𝐴 / 𝐵)) = ((∗‘𝐴) / (∗‘𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | divcl 11639 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐴 / 𝐵) ∈ ℂ) | |
2 | cjcl 14816 | . . . 4 ⊢ ((𝐴 / 𝐵) ∈ ℂ → (∗‘(𝐴 / 𝐵)) ∈ ℂ) | |
3 | 1, 2 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘(𝐴 / 𝐵)) ∈ ℂ) |
4 | simp2 1136 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → 𝐵 ∈ ℂ) | |
5 | cjcl 14816 | . . . 4 ⊢ (𝐵 ∈ ℂ → (∗‘𝐵) ∈ ℂ) | |
6 | 4, 5 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘𝐵) ∈ ℂ) |
7 | simp3 1137 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → 𝐵 ≠ 0) | |
8 | cjne0 14874 | . . . . 5 ⊢ (𝐵 ∈ ℂ → (𝐵 ≠ 0 ↔ (∗‘𝐵) ≠ 0)) | |
9 | 4, 8 | syl 17 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐵 ≠ 0 ↔ (∗‘𝐵) ≠ 0)) |
10 | 7, 9 | mpbid 231 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘𝐵) ≠ 0) |
11 | 3, 6, 10 | divcan4d 11757 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (((∗‘(𝐴 / 𝐵)) · (∗‘𝐵)) / (∗‘𝐵)) = (∗‘(𝐴 / 𝐵))) |
12 | cjmul 14853 | . . . . 5 ⊢ (((𝐴 / 𝐵) ∈ ℂ ∧ 𝐵 ∈ ℂ) → (∗‘((𝐴 / 𝐵) · 𝐵)) = ((∗‘(𝐴 / 𝐵)) · (∗‘𝐵))) | |
13 | 1, 4, 12 | syl2anc 584 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘((𝐴 / 𝐵) · 𝐵)) = ((∗‘(𝐴 / 𝐵)) · (∗‘𝐵))) |
14 | divcan1 11642 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → ((𝐴 / 𝐵) · 𝐵) = 𝐴) | |
15 | 14 | fveq2d 6778 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘((𝐴 / 𝐵) · 𝐵)) = (∗‘𝐴)) |
16 | 13, 15 | eqtr3d 2780 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → ((∗‘(𝐴 / 𝐵)) · (∗‘𝐵)) = (∗‘𝐴)) |
17 | 16 | oveq1d 7290 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (((∗‘(𝐴 / 𝐵)) · (∗‘𝐵)) / (∗‘𝐵)) = ((∗‘𝐴) / (∗‘𝐵))) |
18 | 11, 17 | eqtr3d 2780 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (∗‘(𝐴 / 𝐵)) = ((∗‘𝐴) / (∗‘𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 0cc0 10871 · cmul 10876 / cdiv 11632 ∗ccj 14807 |
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 df-2 12036 df-cj 14810 df-re 14811 df-im 14812 |
This theorem is referenced by: cjdivi 14902 cjdivd 14934 dipcj 29076 |
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