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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 12017 | . . . 4 ⊢ -1 ∈ ℂ | |
2 | 2re 11977 | . . . . . 6 ⊢ 2 ∈ ℝ | |
3 | simpl 482 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℕ) | |
4 | nndivre 11944 | . . . . . 6 ⊢ ((2 ∈ ℝ ∧ 𝑁 ∈ ℕ) → (2 / 𝑁) ∈ ℝ) | |
5 | 2, 3, 4 | sylancr 586 | . . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (2 / 𝑁) ∈ ℝ) |
6 | 5 | recnd 10934 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (2 / 𝑁) ∈ ℂ) |
7 | cxpcl 25734 | . . . 4 ⊢ ((-1 ∈ ℂ ∧ (2 / 𝑁) ∈ ℂ) → (-1↑𝑐(2 / 𝑁)) ∈ ℂ) | |
8 | 1, 6, 7 | sylancr 586 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (-1↑𝑐(2 / 𝑁)) ∈ ℂ) |
9 | 1 | a1i 11 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → -1 ∈ ℂ) |
10 | neg1ne0 12019 | . . . . 5 ⊢ -1 ≠ 0 | |
11 | 10 | a1i 11 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → -1 ≠ 0) |
12 | 9, 11, 6 | cxpne0d 25773 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (-1↑𝑐(2 / 𝑁)) ≠ 0) |
13 | simpr 484 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝐾 ∈ ℤ) | |
14 | nnz 12272 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ) | |
15 | 14 | adantr 480 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℤ) |
16 | 8, 12, 13, 15 | expsubd 13803 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑(𝑁 − 𝐾)) = (((-1↑𝑐(2 / 𝑁))↑𝑁) / ((-1↑𝑐(2 / 𝑁))↑𝐾))) |
17 | root1id 25812 | . . . 4 ⊢ (𝑁 ∈ ℕ → ((-1↑𝑐(2 / 𝑁))↑𝑁) = 1) | |
18 | 17 | adantr 480 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝑁) = 1) |
19 | 18 | oveq1d 7270 | . 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 13797 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝐾) ∈ ℂ) |
21 | 8, 12, 13 | expne0d 13798 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((-1↑𝑐(2 / 𝑁))↑𝐾) ≠ 0) |
22 | recval 14962 | . . . 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 583 | . . 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 14945 | . . . . . . . 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 1369 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘((-1↑𝑐(2 / 𝑁))↑𝐾)) = ((abs‘(-1↑𝑐(2 / 𝑁)))↑𝐾)) |
26 | abscxp2 25753 | . . . . . . . . . . 11 ⊢ ((-1 ∈ ℂ ∧ (2 / 𝑁) ∈ ℝ) → (abs‘(-1↑𝑐(2 / 𝑁))) = ((abs‘-1)↑𝑐(2 / 𝑁))) | |
27 | 1, 5, 26 | sylancr 586 | . . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘(-1↑𝑐(2 / 𝑁))) = ((abs‘-1)↑𝑐(2 / 𝑁))) |
28 | ax-1cn 10860 | . . . . . . . . . . . . 13 ⊢ 1 ∈ ℂ | |
29 | 28 | absnegi 15040 | . . . . . . . . . . . 12 ⊢ (abs‘-1) = (abs‘1) |
30 | abs1 14937 | . . . . . . . . . . . 12 ⊢ (abs‘1) = 1 | |
31 | 29, 30 | eqtri 2766 | . . . . . . . . . . 11 ⊢ (abs‘-1) = 1 |
32 | 31 | oveq1i 7265 | . . . . . . . . . 10 ⊢ ((abs‘-1)↑𝑐(2 / 𝑁)) = (1↑𝑐(2 / 𝑁)) |
33 | 27, 32 | eqtrdi 2795 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (abs‘(-1↑𝑐(2 / 𝑁))) = (1↑𝑐(2 / 𝑁))) |
34 | 6 | 1cxpd 25767 | . . . . . . . . 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 7270 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘(-1↑𝑐(2 / 𝑁)))↑𝐾) = (1↑𝐾)) |
37 | 1exp 13740 | . . . . . . . 8 ⊢ (𝐾 ∈ ℤ → (1↑𝐾) = 1) | |
38 | 37 | adantl 481 | . . . . . . 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 7270 | . . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2) = (1↑2)) |
41 | sq1 13840 | . . . . 5 ⊢ (1↑2) = 1 | |
42 | 40, 41 | eqtrdi 2795 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → ((abs‘((-1↑𝑐(2 / 𝑁))↑𝐾))↑2) = 1) |
43 | 42 | oveq2d 7271 | . . 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 14835 | . . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝐾 ∈ ℤ) → (∗‘((-1↑𝑐(2 / 𝑁))↑𝐾)) ∈ ℂ) |
45 | 44 | div1d 11673 | . . 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 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ‘cfv 6418 (class class class)co 7255 ℂcc 10800 ℝcr 10801 0cc0 10802 1c1 10803 − cmin 11135 -cneg 11136 / cdiv 11562 ℕcn 11903 2c2 11958 ℤcz 12249 ↑cexp 13710 ∗ccj 14735 abscabs 14873 ↑𝑐ccxp 25616 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 ax-addf 10881 ax-mulf 10882 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-supp 7949 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-pm 8576 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fsupp 9059 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-ioo 13012 df-ioc 13013 df-ico 13014 df-icc 13015 df-fz 13169 df-fzo 13312 df-fl 13440 df-mod 13518 df-seq 13650 df-exp 13711 df-fac 13916 df-bc 13945 df-hash 13973 df-shft 14706 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-limsup 15108 df-clim 15125 df-rlim 15126 df-sum 15326 df-ef 15705 df-sin 15707 df-cos 15708 df-pi 15710 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-starv 16903 df-sca 16904 df-vsca 16905 df-ip 16906 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-hom 16912 df-cco 16913 df-rest 17050 df-topn 17051 df-0g 17069 df-gsum 17070 df-topgen 17071 df-pt 17072 df-prds 17075 df-xrs 17130 df-qtop 17135 df-imas 17136 df-xps 17138 df-mre 17212 df-mrc 17213 df-acs 17215 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-submnd 18346 df-mulg 18616 df-cntz 18838 df-cmn 19303 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-fbas 20507 df-fg 20508 df-cnfld 20511 df-top 21951 df-topon 21968 df-topsp 21990 df-bases 22004 df-cld 22078 df-ntr 22079 df-cls 22080 df-nei 22157 df-lp 22195 df-perf 22196 df-cn 22286 df-cnp 22287 df-haus 22374 df-tx 22621 df-hmeo 22814 df-fil 22905 df-fm 22997 df-flim 22998 df-flf 22999 df-xms 23381 df-ms 23382 df-tms 23383 df-cncf 23947 df-limc 24935 df-dv 24936 df-log 25617 df-cxp 25618 |
This theorem is referenced by: 1cubrlem 25896 |
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