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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cos9thpiminplylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for cos9thpiminply 34187. (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 11165 | . . . . . . . . . . 11 ⊢ i ∈ ℂ | |
| 4 | 2cn 12322 | . . . . . . . . . . . 12 ⊢ 2 ∈ ℂ | |
| 5 | picn 26632 | . . . . . . . . . . . 12 ⊢ π ∈ ℂ | |
| 6 | 4, 5 | mulcli 11222 | . . . . . . . . . . 11 ⊢ (2 · π) ∈ ℂ |
| 7 | 3, 6 | mulcli 11222 | . . . . . . . . . 10 ⊢ (i · (2 · π)) ∈ ℂ |
| 8 | 3cn 12328 | . . . . . . . . . 10 ⊢ 3 ∈ ℂ | |
| 9 | 3ne0 12356 | . . . . . . . . . 10 ⊢ 3 ≠ 0 | |
| 10 | 7, 8, 9 | divcli 11963 | . . . . . . . . 9 ⊢ ((i · (2 · π)) / 3) ∈ ℂ |
| 11 | efcl 16142 | . . . . . . . . 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 11951 | . . . . . . 7 ⊢ (1 / 3) ∈ ℂ |
| 15 | cxpcl 26850 | . . . . . . 7 ⊢ ((𝑂 ∈ ℂ ∧ (1 / 3) ∈ ℂ) → (𝑂↑𝑐(1 / 3)) ∈ ℂ) | |
| 16 | 13, 14, 15 | mp2an 704 | . . . . . 6 ⊢ (𝑂↑𝑐(1 / 3)) ∈ ℂ |
| 17 | 1, 16 | eqeltri 2858 | . . . . 5 ⊢ 𝑍 ∈ ℂ |
| 18 | 3nn0 12528 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 19 | 2nn0 12527 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 20 | expmul 14150 | . . . . 5 ⊢ ((𝑍 ∈ ℂ ∧ 3 ∈ ℕ0 ∧ 2 ∈ ℕ0) → (𝑍↑(3 · 2)) = ((𝑍↑3)↑2)) | |
| 21 | 17, 18, 19, 20 | mp3an 1489 | . . . 4 ⊢ (𝑍↑(3 · 2)) = ((𝑍↑3)↑2) |
| 22 | 3t2e6 12412 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 23 | 22 | oveq2i 7423 | . . . 4 ⊢ (𝑍↑(3 · 2)) = (𝑍↑6) |
| 24 | 1 | oveq1i 7422 | . . . . . . 7 ⊢ (𝑍↑3) = ((𝑂↑𝑐(1 / 3))↑3) |
| 25 | cxpmul2 26865 | . . . . . . . 8 ⊢ ((𝑂 ∈ ℂ ∧ (1 / 3) ∈ ℂ ∧ 3 ∈ ℕ0) → (𝑂↑𝑐((1 / 3) · 3)) = ((𝑂↑𝑐(1 / 3))↑3)) | |
| 26 | 13, 14, 18, 25 | mp3an 1489 | . . . . . . 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 11164 | . . . . . . . 8 ⊢ 1 ∈ ℂ | |
| 29 | 28, 8, 9 | divcan1i 11965 | . . . . . . 7 ⊢ ((1 / 3) · 3) = 1 |
| 30 | 29 | oveq2i 7423 | . . . . . 6 ⊢ (𝑂↑𝑐((1 / 3) · 3)) = (𝑂↑𝑐1) |
| 31 | cxp1 26847 | . . . . . . 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 7422 | . . . 4 ⊢ ((𝑍↑3)↑2) = (𝑂↑2) |
| 35 | 21, 23, 34 | 3eqtr3i 2793 | . . 3 ⊢ (𝑍↑6) = (𝑂↑2) |
| 36 | 35, 33 | oveq12i 7424 | . 2 ⊢ ((𝑍↑6) + (𝑍↑3)) = ((𝑂↑2) + 𝑂) |
| 37 | 13 | sqcli 14224 | . . . . 5 ⊢ (𝑂↑2) ∈ ℂ |
| 38 | 37, 13 | addcli 11221 | . . . 4 ⊢ ((𝑂↑2) + 𝑂) ∈ ℂ |
| 39 | 38, 28 | pm3.2i 475 | . . 3 ⊢ (((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) |
| 40 | 37, 13, 28 | addassi 11225 | . . . 4 ⊢ (((𝑂↑2) + 𝑂) + 1) = ((𝑂↑2) + (𝑂 + 1)) |
| 41 | 2 | cos9thpiminplylem3 34183 | . . . 4 ⊢ ((𝑂↑2) + (𝑂 + 1)) = 0 |
| 42 | 40, 41 | eqtri 2785 | . . 3 ⊢ (((𝑂↑2) + 𝑂) + 1) = 0 |
| 43 | addeq0 11643 | . . . 4 ⊢ ((((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) → ((((𝑂↑2) + 𝑂) + 1) = 0 ↔ ((𝑂↑2) + 𝑂) = -1)) | |
| 44 | 43 | biimpa 481 | . . 3 ⊢ (((((𝑂↑2) + 𝑂) ∈ ℂ ∧ 1 ∈ ℂ) ∧ (((𝑂↑2) + 𝑂) + 1) = 0) → ((𝑂↑2) + 𝑂) = -1) |
| 45 | 39, 42, 44 | mp2an 704 | . 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 400 = wceq 1569 ∈ wcel 2142 ‘cfv 6536 (class class class)co 7412 ℂcc 11104 0cc0 11106 1c1 11107 ici 11108 + caddc 11109 · cmul 11111 -cneg 11448 / cdiv 11877 2c2 12301 3c3 12302 6c6 12305 ℕ0cn0 12510 ↑cexp 14104 expce 16121 πcpi 16126 ↑𝑐ccxp 26731 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-inf2 9608 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 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 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-iin 4958 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-se 5614 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7676 df-om 7861 df-1st 7984 df-2nd 7985 df-supp 8155 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-1o 8451 df-2o 8452 df-er 8692 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9320 df-fi 9369 df-sup 9400 df-inf 9401 df-oi 9470 df-card 9932 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-div 11878 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-9 12316 df-n0 12511 df-z 12598 df-dec 12718 df-uz 12869 df-q 12979 df-rp 13023 df-xneg 13143 df-xadd 13144 df-xmul 13145 df-ioo 13382 df-ioc 13383 df-ico 13384 df-icc 13385 df-fz 13542 df-fzo 13690 df-fl 13832 df-mod 13910 df-seq 14045 df-exp 14105 df-fac 14317 df-bc 14346 df-hash 14374 df-shft 15111 df-cj 15157 df-re 15158 df-im 15159 df-sqrt 15293 df-abs 15294 df-limsup 15529 df-clim 15546 df-rlim 15547 df-sum 15745 df-ef 16127 df-sin 16129 df-cos 16130 df-pi 16132 df-struct 17213 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-ress 17297 df-plusg 17329 df-mulr 17330 df-starv 17331 df-sca 17332 df-vsca 17333 df-ip 17334 df-tset 17335 df-ple 17336 df-ds 17338 df-unif 17339 df-hom 17340 df-cco 17341 df-rest 17481 df-topn 17482 df-0g 17500 df-gsum 17501 df-topgen 17502 df-pt 17503 df-prds 17506 df-xrs 17562 df-qtop 17567 df-imas 17568 df-xps 17570 df-mre 17644 df-mrc 17645 df-acs 17647 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-submnd 18848 df-mulg 19140 df-cntz 19393 df-cmn 19858 df-psmet 21525 df-xmet 21526 df-met 21527 df-bl 21528 df-mopn 21529 df-fbas 21530 df-fg 21531 df-cnfld 21534 df-top 23062 df-topon 23079 df-topsp 23101 df-bases 23114 df-cld 23187 df-ntr 23188 df-cls 23189 df-nei 23266 df-lp 23304 df-perf 23305 df-cn 23395 df-cnp 23396 df-haus 23483 df-tx 23730 df-hmeo 23923 df-fil 24014 df-fm 24106 df-flim 24107 df-flf 24108 df-xms 24488 df-ms 24489 df-tms 24490 df-cncf 25048 df-limc 26036 df-dv 26037 df-log 26732 df-cxp 26733 |
| This theorem is used by: cos9thpiminplylem5 34185 |
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