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Mirrors > Home > MPE Home > Th. List > root1cj | Structured version Visualization version GIF version |
Description: Within the 𝑁-th roots of unity, the conjugate of the 𝐾-th root is the 𝑁 − 𝐾-th root. (Contributed by Mario Carneiro, 23-Apr-2015.) |
Ref | Expression |
---|---|
root1cj | ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((-1↑𝑐(2 / 𝑁))↑(𝑁 − 𝐾))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neg1cn 12087 | . . . 4 ⊢ -1 ∈ ℂ | |
2 | 2re 12047 | . . . . . 6 ⊢ 2 ∈ ℝ | |
3 | simpl 483 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℕ) | |
4 | nndivre 12014 | . . . . . 6 ⊢ ((2 ∈ ℝ ∧ 𝑁 ∈ ℕ) → (2 / 𝑁) ∈ ℝ) | |
5 | 2, 3, 4 | sylancr 587 | . . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (2 / 𝑁) ∈ ℝ) |
6 | 5 | recnd 11003 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (2 / 𝑁) ∈ ℂ) |
7 | cxpcl 25829 | . . . 4 ⊢ ((-1 ∈ ℂ ∧ (2 / 𝑁) ∈ ℂ) → (-1↑𝑐(2 / 𝑁)) ∈ ℂ) | |
8 | 1, 6, 7 | sylancr 587 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (-1↑𝑐(2 / 𝑁)) ∈ ℂ) |
9 | 1 | a1i 11 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → -1 ∈ ℂ) |
10 | neg1ne0 12089 | . . . . 5 ⊢ -1 ≠ 0 | |
11 | 10 | a1i 11 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → -1 ≠ 0) |
12 | 9, 11, 6 | cxpne0d 25868 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (-1↑𝑐(2 / 𝑁)) ≠ 0) |
13 | simpr 485 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝐾 ∈ ℤ) | |
14 | nnz 12342 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ) | |
15 | 14 | adantr 481 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℤ) |
16 | 8, 12, 13, 15 | expsubd 13875 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑(𝑁 − 𝐾)) = (((-1↑𝑐(2 / 𝑁))↑𝑁) / ((-1↑𝑐(2 / 𝑁))↑𝐾))) |
17 | root1id 25907 | . . . 4 ⊢ (𝑁 ∈ ℕ → ((-1↑𝑐(2 / 𝑁))↑𝑁) = 1) | |
18 | 17 | adantr 481 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝑁) = 1) |
19 | 18 | oveq1d 7290 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (((-1↑𝑐(2 / 𝑁))↑𝑁) / ((-1↑𝑐(2 / 𝑁))↑𝐾)) = (1 / ((-1↑𝑐(2 / 𝑁))↑𝐾))) |
20 | 8, 12, 13 | expclzd 13869 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝐾) ∈ ℂ) |
21 | 8, 12, 13 | expne0d 13870 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝐾) ≠ 0) |
22 | recval 15034 | . . . 4 ⊢ ((((-1↑𝑐(2 / 𝑁))↑𝐾) ∈ ℂ ∧ ((-1↑𝑐(2 / 𝑁))↑𝐾) ≠ 0) → (1 / ((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) / ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2))) | |
23 | 20, 21, 22 | syl2anc 584 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (1 / ((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) / ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2))) |
24 | absexpz 15017 | . . . . . . . 8 ⊢ (((-1↑𝑐(2 / 𝑁)) ∈ ℂ ∧ (-1↑𝑐(2 / 𝑁)) ≠ 0 ∧ 𝐾 ∈ ℤ) → (abs‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((abs‘(-1↑𝑐(2 / 𝑁)))↑𝐾)) | |
25 | 8, 12, 13, 24 | syl3anc 1370 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((abs‘(-1↑𝑐(2 / 𝑁)))↑𝐾)) |
26 | abscxp2 25848 | . . . . . . . . . . 11 ⊢ ((-1 ∈ ℂ ∧ (2 / 𝑁) ∈ ℝ) → (abs‘(-1↑𝑐(2 / 𝑁))) = ((abs‘-1)↑𝑐(2 / 𝑁))) | |
27 | 1, 5, 26 | sylancr 587 | . . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘(-1↑𝑐(2 / 𝑁))) = ((abs‘-1)↑𝑐(2 / 𝑁))) |
28 | ax-1cn 10929 | . . . . . . . . . . . . 13 ⊢ 1 ∈ ℂ | |
29 | 28 | absnegi 15112 | . . . . . . . . . . . 12 ⊢ (abs‘-1) = (abs‘1) |
30 | abs1 15009 | . . . . . . . . . . . 12 ⊢ (abs‘1) = 1 | |
31 | 29, 30 | eqtri 2766 | . . . . . . . . . . 11 ⊢ (abs‘-1) = 1 |
32 | 31 | oveq1i 7285 | . . . . . . . . . 10 ⊢ ((abs‘-1)↑𝑐(2 / 𝑁)) = (1↑𝑐(2 / 𝑁)) |
33 | 27, 32 | eqtrdi 2794 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘(-1↑𝑐(2 / 𝑁))) = (1↑𝑐(2 / 𝑁))) |
34 | 6 | 1cxpd 25862 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (1↑𝑐(2 / 𝑁)) = 1) |
35 | 33, 34 | eqtrd 2778 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘(-1↑𝑐(2 / 𝑁))) = 1) |
36 | 35 | oveq1d 7290 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘(-1↑𝑐(2 / 𝑁)))↑𝐾) = (1↑𝐾)) |
37 | 1exp 13812 | . . . . . . . 8 ⊢ (𝐾 ∈ ℤ → (1↑𝐾) = 1) | |
38 | 37 | adantl 482 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (1↑𝐾) = 1) |
39 | 25, 36, 38 | 3eqtrd 2782 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = 1) |
40 | 39 | oveq1d 7290 | . . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2) = (1↑2)) |
41 | sq1 13912 | . . . . 5 ⊢ (1↑2) = 1 | |
42 | 40, 41 | eqtrdi 2794 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2) = 1) |
43 | 42 | oveq2d 7291 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) / ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2)) = ((∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) / 1)) |
44 | 20 | cjcld 14907 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) ∈ ℂ) |
45 | 44 | div1d 11743 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) / 1) = (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾))) |
46 | 23, 43, 45 | 3eqtrd 2782 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (1 / ((-1↑𝑐(2 / 𝑁))↑𝐾)) = (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾))) |
47 | 16, 19, 46 | 3eqtrrd 2783 | 1 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((-1↑𝑐(2 / 𝑁))↑(𝑁 − 𝐾))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 1c1 10872 − cmin 11205 -cneg 11206 / cdiv 11632 ℕcn 11973 2c2 12028 ℤcz 12319 ↑cexp 13782 ∗ccj 14807 abscabs 14945 ↑𝑐ccxp 25711 |
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-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 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 ax-pre-sup 10949 ax-addf 10950 ax-mulf 10951 |
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-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 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-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 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-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-of 7533 df-om 7713 df-1st 7831 df-2nd 7832 df-supp 7978 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-map 8617 df-pm 8618 df-ixp 8686 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fsupp 9129 df-fi 9170 df-sup 9201 df-inf 9202 df-oi 9269 df-card 9697 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-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-z 12320 df-dec 12438 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ioo 13083 df-ioc 13084 df-ico 13085 df-icc 13086 df-fz 13240 df-fzo 13383 df-fl 13512 df-mod 13590 df-seq 13722 df-exp 13783 df-fac 13988 df-bc 14017 df-hash 14045 df-shft 14778 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-limsup 15180 df-clim 15197 df-rlim 15198 df-sum 15398 df-ef 15777 df-sin 15779 df-cos 15780 df-pi 15782 df-struct 16848 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-starv 16977 df-sca 16978 df-vsca 16979 df-ip 16980 df-tset 16981 df-ple 16982 df-ds 16984 df-unif 16985 df-hom 16986 df-cco 16987 df-rest 17133 df-topn 17134 df-0g 17152 df-gsum 17153 df-topgen 17154 df-pt 17155 df-prds 17158 df-xrs 17213 df-qtop 17218 df-imas 17219 df-xps 17221 df-mre 17295 df-mrc 17296 df-acs 17298 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-submnd 18431 df-mulg 18701 df-cntz 18923 df-cmn 19388 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-fbas 20594 df-fg 20595 df-cnfld 20598 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-cld 22170 df-ntr 22171 df-cls 22172 df-nei 22249 df-lp 22287 df-perf 22288 df-cn 22378 df-cnp 22379 df-haus 22466 df-tx 22713 df-hmeo 22906 df-fil 22997 df-fm 23089 df-flim 23090 df-flf 23091 df-xms 23473 df-ms 23474 df-tms 23475 df-cncf 24041 df-limc 25030 df-dv 25031 df-log 25712 df-cxp 25713 |
This theorem is referenced by: 1cubrlem 25991 |
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