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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cos9thpiminplylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for cos9thpiminply 34285. (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 11186 | . . . . . . . . . . 11 ⊢ i ∈ ℂ | |
| 4 | 2cn 12343 | . . . . . . . . . . . 12 ⊢ 2 ∈ ℂ | |
| 5 | picn 26691 | . . . . . . . . . . . 12 ⊢ π ∈ ℂ | |
| 6 | 4, 5 | mulcli 11243 | . . . . . . . . . . 11 ⊢ (2 · π) ∈ ℂ |
| 7 | 3, 6 | mulcli 11243 | . . . . . . . . . 10 ⊢ (i · (2 · π)) ∈ ℂ |
| 8 | 3cn 12349 | . . . . . . . . . 10 ⊢ 3 ∈ ℂ | |
| 9 | 3ne0 12377 | . . . . . . . . . 10 ⊢ 3 ≠ 0 | |
| 10 | 7, 8, 9 | divcli 11984 | . . . . . . . . 9 ⊢ ((i · (2 · π)) / 3) ∈ ℂ |
| 11 | efcl 16172 | . . . . . . . . 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 2858 | . . . . . . 7 ⊢ 𝑂 ∈ ℂ |
| 14 | 8, 9 | reccli 11972 | . . . . . . 7 ⊢ (1 / 3) ∈ ℂ |
| 15 | cxpcl 26909 | . . . . . . 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 2858 | . . . . 5 ⊢ 𝑍 ∈ ℂ |
| 18 | 3nn0 12549 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 19 | 2nn0 12548 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 20 | expmul 14173 | . . . . 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 12433 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 23 | 22 | oveq2i 7427 | . . . 4 ⊢ (𝑍↑(3 · 2)) = (𝑍↑6) |
| 24 | 1 | oveq1i 7426 | . . . . . . 7 ⊢ (𝑍↑3) = ((𝑂↑𝑐(1 / 3))↑3) |
| 25 | cxpmul2 26924 | . . . . . . . 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 2788 | . . . . . 6 ⊢ (𝑍↑3) = (𝑂↑𝑐((1 / 3) · 3)) |
| 28 | ax-1cn 11185 | . . . . . . . 8 ⊢ 1 ∈ ℂ | |
| 29 | 28, 8, 9 | divcan1i 11986 | . . . . . . 7 ⊢ ((1 / 3) · 3) = 1 |
| 30 | 29 | oveq2i 7427 | . . . . . 6 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = (𝑂↑𝑐1) |
| 31 | cxp1 26906 | . . . . . . 7 ⊢ (𝑂 ∈ ℂ → (𝑂↑𝑐1) = 𝑂) | |
| 32 | 13, 31 | ax-mp 5 | . . . . . 6 ⊢ (𝑂↑𝑐1) = 𝑂 |
| 33 | 27, 30, 32 | 3eqtri 2789 | . . . . 5 ⊢ (𝑍↑3) = 𝑂 |
| 34 | 33 | oveq1i 7426 | . . . 4 ⊢ ((𝑍↑3)↑2) = (𝑂↑2) |
| 35 | 21, 23, 34 | 3eqtr3i 2793 | . . 3 ⊢ (𝑍↑6) = (𝑂↑2) |
| 36 | 35, 33 | oveq12i 7428 | . 2 ⊢ ((𝑍↑6) + (𝑍↑3)) = ((𝑂↑2) + 𝑂) |
| 37 | 13 | sqcli 14247 | . . . . 5 ⊢ (𝑂↑2) ∈ ℂ |
| 38 | 37, 13 | addcli 11242 | . . . 4 ⊢ ((𝑂↑2) + 𝑂) ∈ ℂ |
| 39 | 38, 28 | pm3.2i 476 | . . 3 ⊢ (((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) |
| 40 | 37, 13, 28 | addassi 11246 | . . . 4 ⊢ (((𝑂↑2) + 𝑂) + 1) = ((𝑂↑2) + (𝑂 + 1)) |
| 41 | 2 | cos9thpiminplylem3 34281 | . . . 4 ⊢ ((𝑂↑2) + (𝑂 + 1)) = 0 |
| 42 | 40, 41 | eqtri 2785 | . . 3 ⊢ (((𝑂↑2) + 𝑂) + 1) = 0 |
| 43 | addeq0 11664 | . . . 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 2785 | 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 6537 (class class class)co 7416 ℂcc 11125 0cc0 11127 1c1 11128 ici 11129 + caddc 11130 · cmul 11132 -cneg 11469 / cdiv 11898 2c2 12322 3c3 12323 6c6 12326 ℕ0cn0 12531 ↑cexp 14127 expce 16151 πcpi 16156 ↑𝑐ccxp 26790 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-inf2 9623 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 ax-addf 11206 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-iin 4957 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-se 5613 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-of 7681 df-om 7866 df-1st 7989 df-2nd 7990 df-supp 8162 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8458 df-2o 8459 df-er 8699 df-map 8831 df-pm 8832 df-ixp 8908 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-fsupp 9335 df-fi 9384 df-sup 9415 df-inf 9416 df-oi 9485 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-dec 12740 df-uz 12891 df-q 13001 df-rp 13045 df-xneg 13165 df-xadd 13166 df-xmul 13167 df-ioo 13404 df-ioc 13405 df-ico 13406 df-icc 13407 df-fz 13564 df-fzo 13712 df-fl 13855 df-mod 13933 df-seq 14068 df-exp 14128 df-fac 14340 df-bc 14369 df-hash 14397 df-shft 15142 df-cj 15188 df-re 15189 df-im 15190 df-sqrt 15324 df-abs 15325 df-limsup 15560 df-clim 15577 df-rlim 15578 df-sum 15776 df-ef 16157 df-sin 16159 df-cos 16160 df-pi 16162 df-struct 17243 df-sets 17260 df-slot 17278 df-ndx 17290 df-base 17306 df-ress 17327 df-plusg 17359 df-mulr 17360 df-starv 17361 df-sca 17362 df-vsca 17363 df-ip 17364 df-tset 17365 df-ple 17366 df-ds 17368 df-unif 17369 df-hom 17370 df-cco 17371 df-rest 17511 df-topn 17512 df-0g 17530 df-gsum 17531 df-topgen 17532 df-pt 17533 df-prds 17536 df-xrs 17592 df-qtop 17597 df-imas 17598 df-xps 17600 df-mre 17674 df-mrc 17675 df-acs 17677 df-mgm 18734 df-sgrp 18823 df-mnd 18839 df-submnd 18893 df-mulg 19192 df-cntz 19445 df-cmn 19910 df-psmet 21578 df-xmet 21579 df-met 21580 df-bl 21581 df-mopn 21582 df-fbas 21583 df-fg 21584 df-cnfld 21587 df-top 23120 df-topon 23137 df-topsp 23159 df-bases 23172 df-cld 23245 df-ntr 23246 df-cls 23247 df-nei 23324 df-lp 23362 df-perf 23363 df-cn 23453 df-cnp 23454 df-haus 23541 df-tx 23789 df-hmeo 23982 df-fil 24073 df-fm 24165 df-flim 24166 df-flf 24167 df-xms 24547 df-ms 24548 df-tms 24549 df-cncf 25107 df-limc 26095 df-dv 26096 df-log 26791 df-cxp 26792 |
| This theorem is used by: cos9thpiminplylem5 34283 |
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