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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cos9thpiminplylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for cos9thpiminply 34339. (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 11216 | . . . . . . . . . . 11 ⊢ i ∈ ℂ | |
| 4 | 2cn 12373 | . . . . . . . . . . . 12 ⊢ 2 ∈ ℂ | |
| 5 | picn 26734 | . . . . . . . . . . . 12 ⊢ π ∈ ℂ | |
| 6 | 4, 5 | mulcli 11273 | . . . . . . . . . . 11 ⊢ (2 · π) ∈ ℂ |
| 7 | 3, 6 | mulcli 11273 | . . . . . . . . . 10 ⊢ (i · (2 · π)) ∈ ℂ |
| 8 | 3cn 12379 | . . . . . . . . . 10 ⊢ 3 ∈ ℂ | |
| 9 | 3ne0 12407 | . . . . . . . . . 10 ⊢ 3 ≠ 0 | |
| 10 | 7, 8, 9 | divcli 12014 | . . . . . . . . 9 ⊢ ((i · (2 · π)) / 3) ∈ ℂ |
| 11 | efcl 16201 | . . . . . . . . 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 2856 | . . . . . . 7 ⊢ 𝑂 ∈ ℂ |
| 14 | 8, 9 | reccli 12002 | . . . . . . 7 ⊢ (1 / 3) ∈ ℂ |
| 15 | cxpcl 26951 | . . . . . . 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 2856 | . . . . 5 ⊢ 𝑍 ∈ ℂ |
| 18 | 3nn0 12579 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 19 | 2nn0 12578 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 20 | expmul 14204 | . . . . 5 ⊢ ((𝑍 ∈ ℂ ∧ 3 ∈ ℕ0 ∧ 2 ∈ ℕ0) → (𝑍↑(3 · 2)) = ((𝑍↑3)↑2)) | |
| 21 | 17, 18, 19, 20 | mp3an 1490 | . . . 4 ⊢ (𝑍↑(3 · 2)) = ((𝑍↑3)↑2) |
| 22 | 3t2e6 12463 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 23 | 22 | oveq2i 7420 | . . . 4 ⊢ (𝑍↑(3 · 2)) = (𝑍↑6) |
| 24 | 1 | oveq1i 7419 | . . . . . . 7 ⊢ (𝑍↑3) = ((𝑂↑𝑐(1 / 3))↑3) |
| 25 | cxpmul2 26966 | . . . . . . . 8 ⊢ ((𝑂 ∈ ℂ ∧ (1 / 3) ∈ ℂ ∧ 3 ∈ ℕ0) → (𝑂↑𝑐((1 / 3) · 3)) = ((𝑂↑𝑐(1 / 3))↑3)) | |
| 26 | 13, 14, 18, 25 | mp3an 1490 | . . . . . . 7 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = ((𝑂↑𝑐(1 / 3))↑3) |
| 27 | 24, 26 | eqtr4i 2786 | . . . . . 6 ⊢ (𝑍↑3) = (𝑂↑𝑐((1 / 3) · 3)) |
| 28 | ax-1cn 11215 | . . . . . . . 8 ⊢ 1 ∈ ℂ | |
| 29 | 28, 8, 9 | divcan1i 12016 | . . . . . . 7 ⊢ ((1 / 3) · 3) = 1 |
| 30 | 29 | oveq2i 7420 | . . . . . 6 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = (𝑂↑𝑐1) |
| 31 | cxp1 26948 | . . . . . . 7 ⊢ (𝑂 ∈ ℂ → (𝑂↑𝑐1) = 𝑂) | |
| 32 | 13, 31 | ax-mp 5 | . . . . . 6 ⊢ (𝑂↑𝑐1) = 𝑂 |
| 33 | 27, 30, 32 | 3eqtri 2787 | . . . . 5 ⊢ (𝑍↑3) = 𝑂 |
| 34 | 33 | oveq1i 7419 | . . . 4 ⊢ ((𝑍↑3)↑2) = (𝑂↑2) |
| 35 | 21, 23, 34 | 3eqtr3i 2791 | . . 3 ⊢ (𝑍↑6) = (𝑂↑2) |
| 36 | 35, 33 | oveq12i 7421 | . 2 ⊢ ((𝑍↑6) + (𝑍↑3)) = ((𝑂↑2) + 𝑂) |
| 37 | 13 | sqcli 14278 | . . . . 5 ⊢ (𝑂↑2) ∈ ℂ |
| 38 | 37, 13 | addcli 11272 | . . . 4 ⊢ ((𝑂↑2) + 𝑂) ∈ ℂ |
| 39 | 38, 28 | pm3.2i 476 | . . 3 ⊢ (((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) |
| 40 | 37, 13, 28 | addassi 11276 | . . . 4 ⊢ (((𝑂↑2) + 𝑂) + 1) = ((𝑂↑2) + (𝑂 + 1)) |
| 41 | 2 | cos9thpiminplylem3 34335 | . . . 4 ⊢ ((𝑂↑2) + (𝑂 + 1)) = 0 |
| 42 | 40, 41 | eqtri 2783 | . . 3 ⊢ (((𝑂↑2) + 𝑂) + 1) = 0 |
| 43 | addeq0 11694 | . . . 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 2783 | 1 ⊢ ((𝑍↑6) + (𝑍↑3)) = -1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 ‘cfv 6528 (class class class)co 7409 ℂcc 11155 0cc0 11157 1c1 11158 ici 11159 + caddc 11160 · cmul 11162 -cneg 11499 / cdiv 11928 2c2 12352 3c3 12353 6c6 12356 ℕ0cn0 12561 ↑cexp 14158 expce 16180 πcpi 16185 ↑𝑐ccxp 26832 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7735 ax-inf2 9620 ax-cnex 11213 ax-resscn 11214 ax-1cn 11215 ax-icn 11216 ax-addcl 11217 ax-addrcl 11218 ax-mulcl 11219 ax-mulrcl 11220 ax-mulcom 11221 ax-addass 11222 ax-mulass 11223 ax-distr 11224 ax-i2m1 11225 ax-1ne0 11226 ax-1rid 11227 ax-rnegex 11228 ax-rrecex 11229 ax-cnre 11230 ax-pre-lttri 11231 ax-pre-lttrn 11232 ax-pre-ltadd 11233 ax-pre-mulgt0 11234 ax-pre-sup 11235 ax-addf 11236 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-se 5602 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6294 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 df-isom 6537 df-riota 7366 df-ov 7412 df-oprab 7413 df-mpo 7414 df-of 7677 df-om 7862 df-1st 7985 df-2nd 7986 df-supp 8157 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8455 df-2o 8456 df-er 8696 df-map 8828 df-pm 8829 df-ixp 8905 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-fsupp 9332 df-fi 9381 df-sup 9412 df-inf 9413 df-oi 9482 df-card 9977 df-pnf 11302 df-mnf 11303 df-xr 11304 df-ltxr 11305 df-le 11306 df-sub 11500 df-neg 11501 df-div 11929 df-nn 12291 df-2 12360 df-3 12361 df-4 12362 df-5 12363 df-6 12364 df-7 12365 df-8 12366 df-9 12367 df-n0 12562 df-z 12649 df-dec 12770 df-uz 12921 df-q 13031 df-rp 13076 df-xneg 13196 df-xadd 13197 df-xmul 13198 df-ioo 13435 df-ioc 13436 df-ico 13437 df-icc 13438 df-fz 13595 df-fzo 13743 df-fl 13886 df-mod 13964 df-seq 14099 df-exp 14159 df-fac 14371 df-bc 14400 df-hash 14428 df-shft 15173 df-cj 15219 df-re 15220 df-im 15221 df-sqrt 15355 df-abs 15356 df-limsup 15591 df-clim 15608 df-rlim 15609 df-sum 15807 df-ef 16186 df-sin 16188 df-cos 16189 df-pi 16191 df-struct 17272 df-sets 17289 df-slot 17307 df-ndx 17319 df-base 17335 df-ress 17356 df-plusg 17388 df-mulr 17389 df-starv 17390 df-sca 17391 df-vsca 17392 df-ip 17393 df-tset 17394 df-ple 17395 df-ds 17397 df-unif 17398 df-hom 17399 df-cco 17400 df-rest 17540 df-topn 17541 df-0g 17559 df-gsum 17560 df-topgen 17561 df-pt 17562 df-prds 17565 df-xrs 17621 df-qtop 17626 df-imas 17627 df-xps 17629 df-mre 17703 df-mrc 17704 df-acs 17706 df-mgm 18763 df-sgrp 18855 df-mnd 18871 df-submnd 18926 df-mulg 19225 df-cntz 19478 df-cmn 19943 df-psmet 21617 df-xmet 21618 df-met 21619 df-bl 21620 df-mopn 21621 df-fbas 21622 df-fg 21623 df-cnfld 21626 df-top 23159 df-topon 23176 df-topsp 23198 df-bases 23211 df-cld 23284 df-ntr 23285 df-cls 23286 df-nei 23363 df-lp 23401 df-perf 23402 df-cn 23492 df-cnp 23493 df-haus 23580 df-tx 23828 df-hmeo 24021 df-fil 24112 df-fm 24204 df-flim 24205 df-flf 24206 df-xms 24586 df-ms 24587 df-tms 24588 df-cncf 25146 df-limc 26133 df-dv 26134 df-log 26833 df-cxp 26834 |
| This theorem is used by: cos9thpiminplylem5 34337 |
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