fourierdlem67 - Mathbox for Glauco Siliprandi

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Theorem fourierdlem67 46161

Description: 𝐺 is a function. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
fourierdlem67.f	⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
fourierdlem67.x	⊢ (𝜑 → 𝑋 ∈ ℝ)
fourierdlem67.y	⊢ (𝜑 → 𝑌 ∈ ℝ)
fourierdlem67.w	⊢ (𝜑 → 𝑊 ∈ ℝ)
fourierdlem67.h	⊢ 𝐻 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 0, (((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑌, 𝑊)) / 𝑠)))
fourierdlem67.k	⊢ 𝐾 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))
fourierdlem67.u	⊢ 𝑈 = (𝑠 ∈ (-π[,]π) ↦ ((𝐻‘𝑠) · (𝐾‘𝑠)))
fourierdlem67.n	⊢ (𝜑 → 𝑁 ∈ ℝ)
fourierdlem67.s	⊢ 𝑆 = (𝑠 ∈ (-π[,]π) ↦ (sin‘((𝑁 + (1 / 2)) · 𝑠)))
fourierdlem67.g	⊢ 𝐺 = (𝑠 ∈ (-π[,]π) ↦ ((𝑈‘𝑠) · (𝑆‘𝑠)))

**Assertion**
Ref	Expression
fourierdlem67	⊢ (𝜑 → 𝐺:(-π[,]π)⟶ℝ)

Distinct variable groups: 𝑁,𝑠 𝜑,𝑠 Allowed substitution hints: 𝑆(𝑠) 𝑈(𝑠) 𝐹(𝑠) 𝐺(𝑠) 𝐻(𝑠) 𝐾(𝑠) 𝑊(𝑠) 𝑋(𝑠) 𝑌(𝑠)

**Proof of Theorem fourierdlem67**
Step	Hyp	Ref	Expression
1		fourierdlem67.f	. . . . 5 ⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
2		fourierdlem67.x	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ ℝ)
3		fourierdlem67.y	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ ℝ)
4		fourierdlem67.w	. . . . 5 ⊢ (𝜑 → 𝑊 ∈ ℝ)
5		fourierdlem67.h	. . . . 5 ⊢ 𝐻 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 0, (((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑌, 𝑊)) / 𝑠)))
6		fourierdlem67.k	. . . . 5 ⊢ 𝐾 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))
7		fourierdlem67.u	. . . . 5 ⊢ 𝑈 = (𝑠 ∈ (-π[,]π) ↦ ((𝐻‘𝑠) · (𝐾‘𝑠)))
8	1, 2, 3, 4, 5, 6, 7	fourierdlem55 46149	. . . 4 ⊢ (𝜑 → 𝑈:(-π[,]π)⟶ℝ)
9	8	ffvelcdmda 7102	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → (𝑈‘𝑠) ∈ ℝ)
10		fourierdlem67.n	. . . . 5 ⊢ (𝜑 → 𝑁 ∈ ℝ)
11		fourierdlem67.s	. . . . . 6 ⊢ 𝑆 = (𝑠 ∈ (-π[,]π) ↦ (sin‘((𝑁 + (1 / 2)) · 𝑠)))
12	11	fourierdlem5 46100	. . . . 5 ⊢ (𝑁 ∈ ℝ → 𝑆:(-π[,]π)⟶ℝ)
13	10, 12	syl 17	. . . 4 ⊢ (𝜑 → 𝑆:(-π[,]π)⟶ℝ)
14	13	ffvelcdmda 7102	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → (𝑆‘𝑠) ∈ ℝ)
15	9, 14	remulcld 11287	. 2 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → ((𝑈‘𝑠) · (𝑆‘𝑠)) ∈ ℝ)
16		fourierdlem67.g	. 2 ⊢ 𝐺 = (𝑠 ∈ (-π[,]π) ↦ ((𝑈‘𝑠) · (𝑆‘𝑠)))
17	15, 16	fmptd 7132	1 ⊢ (𝜑 → 𝐺:(-π[,]π)⟶ℝ)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 ifcif 4524 class class class wbr 5141 ↦ cmpt 5223 ⟶wf 6555 ‘cfv 6559 (class class class)co 7429 ℝcr 11150 0cc0 11151 1c1 11152 + caddc 11154 · cmul 11156 < clt 11291 − cmin 11488 -cneg 11489 / cdiv 11916 2c2 12317 [,]cicc 13386 sincsin 16095 πcpi 16098

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5277 ax-sep 5294 ax-nul 5304 ax-pow 5363 ax-pr 5430 ax-un 7751 ax-inf2 9677 ax-cnex 11207 ax-resscn 11208 ax-1cn 11209 ax-icn 11210 ax-addcl 11211 ax-addrcl 11212 ax-mulcl 11213 ax-mulrcl 11214 ax-mulcom 11215 ax-addass 11216 ax-mulass 11217 ax-distr 11218 ax-i2m1 11219 ax-1ne0 11220 ax-1rid 11221 ax-rnegex 11222 ax-rrecex 11223 ax-cnre 11224 ax-pre-lttri 11225 ax-pre-lttrn 11226 ax-pre-ltadd 11227 ax-pre-mulgt0 11228 ax-pre-sup 11229 ax-addf 11230

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3379 df-reu 3380 df-rab 3436 df-v 3481 df-sbc 3788 df-csb 3899 df-dif 3953 df-un 3955 df-in 3957 df-ss 3967 df-pss 3970 df-nul 4333 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-tp 4629 df-op 4631 df-uni 4906 df-int 4945 df-iun 4991 df-iin 4992 df-br 5142 df-opab 5204 df-mpt 5224 df-tr 5258 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5635 df-se 5636 df-we 5637 df-xp 5689 df-rel 5690 df-cnv 5691 df-co 5692 df-dm 5693 df-rn 5694 df-res 5695 df-ima 5696 df-pred 6319 df-ord 6385 df-on 6386 df-lim 6387 df-suc 6388 df-iota 6512 df-fun 6561 df-fn 6562 df-f 6563 df-f1 6564 df-fo 6565 df-f1o 6566 df-fv 6567 df-isom 6568 df-riota 7386 df-ov 7432 df-oprab 7433 df-mpo 7434 df-of 7694 df-om 7884 df-1st 8010 df-2nd 8011 df-supp 8182 df-frecs 8302 df-wrecs 8333 df-recs 8407 df-rdg 8446 df-1o 8502 df-2o 8503 df-er 8741 df-map 8864 df-pm 8865 df-ixp 8934 df-en 8982 df-dom 8983 df-sdom 8984 df-fin 8985 df-fsupp 9398 df-fi 9447 df-sup 9478 df-inf 9479 df-oi 9546 df-card 9975 df-pnf 11293 df-mnf 11294 df-xr 11295 df-ltxr 11296 df-le 11297 df-sub 11490 df-neg 11491 df-div 11917 df-nn 12263 df-2 12325 df-3 12326 df-4 12327 df-5 12328 df-6 12329 df-7 12330 df-8 12331 df-9 12332 df-n0 12523 df-z 12610 df-dec 12730 df-uz 12875 df-q 12987 df-rp 13031 df-xneg 13150 df-xadd 13151 df-xmul 13152 df-ioo 13387 df-ioc 13388 df-ico 13389 df-icc 13390 df-fz 13544 df-fzo 13691 df-fl 13828 df-mod 13906 df-seq 14039 df-exp 14099 df-fac 14309 df-bc 14338 df-hash 14366 df-shft 15102 df-cj 15134 df-re 15135 df-im 15136 df-sqrt 15270 df-abs 15271 df-limsup 15503 df-clim 15520 df-rlim 15521 df-sum 15719 df-ef 16099 df-sin 16101 df-cos 16102 df-pi 16104 df-struct 17180 df-sets 17197 df-slot 17215 df-ndx 17227 df-base 17244 df-ress 17271 df-plusg 17306 df-mulr 17307 df-starv 17308 df-sca 17309 df-vsca 17310 df-ip 17311 df-tset 17312 df-ple 17313 df-ds 17315 df-unif 17316 df-hom 17317 df-cco 17318 df-rest 17463 df-topn 17464 df-0g 17482 df-gsum 17483 df-topgen 17484 df-pt 17485 df-prds 17488 df-xrs 17543 df-qtop 17548 df-imas 17549 df-xps 17551 df-mre 17625 df-mrc 17626 df-acs 17628 df-mgm 18649 df-sgrp 18728 df-mnd 18744 df-submnd 18793 df-mulg 19082 df-cntz 19331 df-cmn 19796 df-psmet 21348 df-xmet 21349 df-met 21350 df-bl 21351 df-mopn 21352 df-fbas 21353 df-fg 21354 df-cnfld 21357 df-top 22890 df-topon 22907 df-topsp 22929 df-bases 22943 df-cld 23017 df-ntr 23018 df-cls 23019 df-nei 23096 df-lp 23134 df-perf 23135 df-cn 23225 df-cnp 23226 df-haus 23313 df-tx 23560 df-hmeo 23753 df-fil 23844 df-fm 23936 df-flim 23937 df-flf 23938 df-xms 24320 df-ms 24321 df-tms 24322 df-cncf 24894 df-limc 25891 df-dv 25892

This theorem is referenced by: fourierdlem87 46181 fourierdlem95 46189 fourierdlem103 46197 fourierdlem104 46198

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