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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cos9thpiminplylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for cos9thpiminply 34487. (Contributed by Thierry Arnoux, 14-Nov-2025.) |
| Ref | Expression |
|---|---|
| cos9thpiminplylem3.1 | ⊢ 𝑂 = (exp‘((i · (2 · π)) / 3)) |
| cos9thpiminplylem4.2 | ⊢ 𝑍 = (𝑂↑𝑐(1 / 3)) |
| Ref | Expression |
|---|---|
| cos9thpiminplylem4 | ⊢ ((𝑍↑6) + (𝑍↑3)) = -1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cos9thpiminplylem4.2 | . . . . . 6 ⊢ 𝑍 = (𝑂↑𝑐(1 / 3)) | |
| 2 | cos9thpiminplylem3.1 | . . . . . . . 8 ⊢ 𝑂 = (exp‘((i · (2 · π)) / 3)) | |
| 3 | ax-icn 11283 | . . . . . . . . . . 11 ⊢ i ∈ ℂ | |
| 4 | 2cn 12442 | . . . . . . . . . . . 12 ⊢ 2 ∈ ℂ | |
| 5 | picn 26812 | . . . . . . . . . . . 12 ⊢ π ∈ ℂ | |
| 6 | 4, 5 | mulcli 11340 | . . . . . . . . . . 11 ⊢ (2 · π) ∈ ℂ |
| 7 | 3, 6 | mulcli 11340 | . . . . . . . . . 10 ⊢ (i · (2 · π)) ∈ ℂ |
| 8 | 3cn 12448 | . . . . . . . . . 10 ⊢ 3 ∈ ℂ | |
| 9 | 3ne0 12476 | . . . . . . . . . 10 ⊢ 3 ≠ 0 | |
| 10 | 7, 8, 9 | divcli 12083 | . . . . . . . . 9 ⊢ ((i · (2 · π)) / 3) ∈ ℂ |
| 11 | efcl 16274 | . . . . . . . . 9 ⊢ (((i · (2 · π)) / 3) ∈ ℂ → (exp‘((i · (2 · π)) / 3)) ∈ ℂ) | |
| 12 | 10, 11 | ax-mp 5 | . . . . . . . 8 ⊢ (exp‘((i · (2 · π)) / 3)) ∈ ℂ |
| 13 | 2, 12 | eqeltri 2860 | . . . . . . 7 ⊢ 𝑂 ∈ ℂ |
| 14 | 8, 9 | reccli 12071 | . . . . . . 7 ⊢ (1 / 3) ∈ ℂ |
| 15 | cxpcl 27029 | . . . . . . 7 ⊢ ((𝑂 ∈ ℂ ∧ (1 / 3) ∈ ℂ) → (𝑂↑𝑐(1 / 3)) ∈ ℂ) | |
| 16 | 13, 14, 15 | mp2an 705 | . . . . . 6 ⊢ (𝑂↑𝑐(1 / 3)) ∈ ℂ |
| 17 | 1, 16 | eqeltri 2860 | . . . . 5 ⊢ 𝑍 ∈ ℂ |
| 18 | 3nn0 12648 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 19 | 2nn0 12647 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 20 | expmul 14274 | . . . . 5 ⊢ ((𝑍 ∈ ℂ ∧ 3 ∈ ℕ0 ∧ 2 ∈ ℕ0) → (𝑍↑(3 · 2)) = ((𝑍↑3)↑2)) | |
| 21 | 17, 18, 19, 20 | mp3an 1491 | . . . 4 ⊢ (𝑍↑(3 · 2)) = ((𝑍↑3)↑2) |
| 22 | 3t2e6 12532 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 23 | 22 | oveq2i 7451 | . . . 4 ⊢ (𝑍↑(3 · 2)) = (𝑍↑6) |
| 24 | 1 | oveq1i 7450 | . . . . . . 7 ⊢ (𝑍↑3) = ((𝑂↑𝑐(1 / 3))↑3) |
| 25 | cxpmul2 27044 | . . . . . . . 8 ⊢ ((𝑂 ∈ ℂ ∧ (1 / 3) ∈ ℂ ∧ 3 ∈ ℕ0) → (𝑂↑𝑐((1 / 3) · 3)) = ((𝑂↑𝑐(1 / 3))↑3)) | |
| 26 | 13, 14, 18, 25 | mp3an 1491 | . . . . . . 7 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = ((𝑂↑𝑐(1 / 3))↑3) |
| 27 | 24, 26 | eqtr4i 2789 | . . . . . 6 ⊢ (𝑍↑3) = (𝑂↑𝑐((1 / 3) · 3)) |
| 28 | ax-1cn 11282 | . . . . . . . 8 ⊢ 1 ∈ ℂ | |
| 29 | 28, 8, 9 | divcan1i 12085 | . . . . . . 7 ⊢ ((1 / 3) · 3) = 1 |
| 30 | 29 | oveq2i 7451 | . . . . . 6 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = (𝑂↑𝑐1) |
| 31 | cxp1 27026 | . . . . . . 7 ⊢ (𝑂 ∈ ℂ → (𝑂↑𝑐1) = 𝑂) | |
| 32 | 13, 31 | ax-mp 5 | . . . . . 6 ⊢ (𝑂↑𝑐1) = 𝑂 |
| 33 | 27, 30, 32 | 3eqtri 2790 | . . . . 5 ⊢ (𝑍↑3) = 𝑂 |
| 34 | 33 | oveq1i 7450 | . . . 4 ⊢ ((𝑍↑3)↑2) = (𝑂↑2) |
| 35 | 21, 23, 34 | 3eqtr3i 2794 | . . 3 ⊢ (𝑍↑6) = (𝑂↑2) |
| 36 | 35, 33 | oveq12i 7452 | . 2 ⊢ ((𝑍↑6) + (𝑍↑3)) = ((𝑂↑2) + 𝑂) |
| 37 | 13 | sqcli 14348 | . . . . 5 ⊢ (𝑂↑2) ∈ ℂ |
| 38 | 37, 13 | addcli 11339 | . . . 4 ⊢ ((𝑂↑2) + 𝑂) ∈ ℂ |
| 39 | 38, 28 | pm3.2i 476 | . . 3 ⊢ (((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) |
| 40 | 37, 13, 28 | addassi 11343 | . . . 4 ⊢ (((𝑂↑2) + 𝑂) + 1) = ((𝑂↑2) + (𝑂 + 1)) |
| 41 | 2 | cos9thpiminplylem3 34483 | . . . 4 ⊢ ((𝑂↑2) + (𝑂 + 1)) = 0 |
| 42 | 40, 41 | eqtri 2786 | . . 3 ⊢ (((𝑂↑2) + 𝑂) + 1) = 0 |
| 43 | addeq0 11763 | . . . 4 ⊢ ((((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) → ((((𝑂↑2) + 𝑂) + 1) = 0 ↔ ((𝑂↑2) + 𝑂) = -1)) | |
| 44 | 43 | biimpa 482 | . . 3 ⊢ (((((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) ∧ (((𝑂↑2) + 𝑂) + 1) = 0) → ((𝑂↑2) + 𝑂) = -1) |
| 45 | 39, 42, 44 | mp2an 705 | . 2 ⊢ ((𝑂↑2) + 𝑂) = -1 |
| 46 | 36, 45 | eqtri 2786 | 1 ⊢ ((𝑍↑6) + (𝑍↑3)) = -1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2147 ‘cfv 6555 (class class class)co 7440 ℂcc 11222 0cc0 11224 1c1 11225 ici 11226 + caddc 11227 · cmul 11229 -cneg 11566 / cdiv 11997 2c2 12421 3c3 12422 6c6 12425 ℕ0cn0 12630 ↑cexp 14228 expce 16253 πcpi 16258 ↑𝑐ccxp 26910 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-inf2 9666 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 ax-pre-sup 11302 ax-addf 11303 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-iin 4957 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-isom 6564 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-of 7714 df-om 7899 df-1st 8022 df-2nd 8023 df-supp 8202 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-1o 8501 df-2o 8502 df-er 8742 df-map 8874 df-pm 8875 df-ixp 8951 df-en 8999 df-dom 9000 df-sdom 9001 df-fin 9002 df-fsupp 9379 df-fi 9427 df-sup 9458 df-inf 9459 df-oi 9528 df-card 10044 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-div 11998 df-nn 12360 df-2 12429 df-3 12430 df-4 12431 df-5 12432 df-6 12433 df-7 12434 df-8 12435 df-9 12436 df-n0 12631 df-z 12718 df-dec 12839 df-uz 12990 df-q 13100 df-rp 13145 df-xneg 13265 df-xadd 13266 df-xmul 13267 df-ioo 13504 df-ioc 13505 df-ico 13506 df-icc 13507 df-fz 13664 df-fzo 13813 df-fl 13956 df-mod 14034 df-seq 14169 df-exp 14229 df-fac 14442 df-bc 14471 df-hash 14499 df-shft 15246 df-cj 15292 df-re 15293 df-im 15294 df-sqrt 15428 df-abs 15429 df-limsup 15664 df-clim 15681 df-rlim 15682 df-sum 15880 df-ef 16259 df-sin 16261 df-cos 16262 df-pi 16264 df-struct 17351 df-sets 17368 df-slot 17386 df-ndx 17398 df-base 17414 df-ress 17435 df-plusg 17467 df-mulr 17468 df-starv 17469 df-sca 17470 df-vsca 17471 df-ip 17472 df-tset 17473 df-ple 17474 df-ds 17476 df-unif 17477 df-hom 17478 df-cco 17479 df-rest 17619 df-topn 17620 df-0g 17638 df-gsum 17639 df-topgen 17640 df-pt 17641 df-prds 17644 df-xrs 17700 df-qtop 17705 df-imas 17706 df-xps 17708 df-mre 17782 df-mrc 17783 df-acs 17785 df-mgm 18842 df-sgrp 18934 df-mnd 18950 df-submnd 19005 df-mulg 19304 df-cntz 19558 df-cmn 20023 df-psmet 21697 df-xmet 21698 df-met 21699 df-bl 21700 df-mopn 21701 df-fbas 21702 df-fg 21703 df-cnfld 21706 df-top 23239 df-topon 23256 df-topsp 23278 df-bases 23291 df-cld 23364 df-ntr 23365 df-cls 23366 df-nei 23443 df-lp 23481 df-perf 23482 df-cn 23572 df-cnp 23573 df-haus 23660 df-tx 23908 df-hmeo 24101 df-fil 24192 df-fm 24284 df-flim 24285 df-flf 24286 df-xms 24666 df-ms 24667 df-tms 24668 df-cncf 25226 df-limc 26213 df-dv 26214 df-log 26911 df-cxp 26912 |
| This theorem is used by: cos9thpiminplylem5 34485 |
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