fourierdlem67 - Mathbox for Glauco Siliprandi

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Theorem fourierdlem67 43279

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 43267	. . . 4 ⊢ (𝜑 → 𝑈:(-π[,]π)⟶ℝ)
9	8	ffvelrnda 6864	. . 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 43218	. . . . 5 ⊢ (𝑁 ∈ ℝ → 𝑆:(-π[,]π)⟶ℝ)
13	10, 12	syl 17	. . . 4 ⊢ (𝜑 → 𝑆:(-π[,]π)⟶ℝ)
14	13	ffvelrnda 6864	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → (𝑆‘𝑠) ∈ ℝ)
15	9, 14	remulcld 10752	. 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 6891	1 ⊢ (𝜑 → 𝐺:(-π[,]π)⟶ℝ)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 399 = wceq 1542 ∈ wcel 2114 ifcif 4415 class class class wbr 5031 ↦ cmpt 5111 ⟶wf 6336 ‘cfv 6340 (class class class)co 7173 ℝcr 10617 0cc0 10618 1c1 10619 + caddc 10621 · cmul 10623 < clt 10756 − cmin 10951 -cneg 10952 / cdiv 11378 2c2 11774 [,]cicc 12827 sincsin 15512 πcpi 15515

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2711 ax-rep 5155 ax-sep 5168 ax-nul 5175 ax-pow 5233 ax-pr 5297 ax-un 7482 ax-inf2 9180 ax-cnex 10674 ax-resscn 10675 ax-1cn 10676 ax-icn 10677 ax-addcl 10678 ax-addrcl 10679 ax-mulcl 10680 ax-mulrcl 10681 ax-mulcom 10682 ax-addass 10683 ax-mulass 10684 ax-distr 10685 ax-i2m1 10686 ax-1ne0 10687 ax-1rid 10688 ax-rnegex 10689 ax-rrecex 10690 ax-cnre 10691 ax-pre-lttri 10692 ax-pre-lttrn 10693 ax-pre-ltadd 10694 ax-pre-mulgt0 10695 ax-pre-sup 10696 ax-addf 10697 ax-mulf 10698

This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2541 df-eu 2571 df-clab 2718 df-cleq 2731 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3401 df-sbc 3682 df-csb 3792 df-dif 3847 df-un 3849 df-in 3851 df-ss 3861 df-pss 3863 df-nul 4213 df-if 4416 df-pw 4491 df-sn 4518 df-pr 4520 df-tp 4522 df-op 4524 df-uni 4798 df-int 4838 df-iun 4884 df-iin 4885 df-br 5032 df-opab 5094 df-mpt 5112 df-tr 5138 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5484 df-se 5485 df-we 5486 df-xp 5532 df-rel 5533 df-cnv 5534 df-co 5535 df-dm 5536 df-rn 5537 df-res 5538 df-ima 5539 df-pred 6130 df-ord 6176 df-on 6177 df-lim 6178 df-suc 6179 df-iota 6298 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-isom 6349 df-riota 7130 df-ov 7176 df-oprab 7177 df-mpo 7178 df-of 7428 df-om 7603 df-1st 7717 df-2nd 7718 df-supp 7860 df-wrecs 7979 df-recs 8040 df-rdg 8078 df-1o 8134 df-2o 8135 df-er 8323 df-map 8442 df-pm 8443 df-ixp 8511 df-en 8559 df-dom 8560 df-sdom 8561 df-fin 8562 df-fsupp 8910 df-fi 8951 df-sup 8982 df-inf 8983 df-oi 9050 df-card 9444 df-pnf 10758 df-mnf 10759 df-xr 10760 df-ltxr 10761 df-le 10762 df-sub 10953 df-neg 10954 df-div 11379 df-nn 11720 df-2 11782 df-3 11783 df-4 11784 df-5 11785 df-6 11786 df-7 11787 df-8 11788 df-9 11789 df-n0 11980 df-z 12066 df-dec 12183 df-uz 12328 df-q 12434 df-rp 12476 df-xneg 12593 df-xadd 12594 df-xmul 12595 df-ioo 12828 df-ioc 12829 df-ico 12830 df-icc 12831 df-fz 12985 df-fzo 13128 df-fl 13256 df-mod 13332 df-seq 13464 df-exp 13525 df-fac 13729 df-bc 13758 df-hash 13786 df-shft 14519 df-cj 14551 df-re 14552 df-im 14553 df-sqrt 14687 df-abs 14688 df-limsup 14921 df-clim 14938 df-rlim 14939 df-sum 15139 df-ef 15516 df-sin 15518 df-cos 15519 df-pi 15521 df-struct 16591 df-ndx 16592 df-slot 16593 df-base 16595 df-sets 16596 df-ress 16597 df-plusg 16684 df-mulr 16685 df-starv 16686 df-sca 16687 df-vsca 16688 df-ip 16689 df-tset 16690 df-ple 16691 df-ds 16693 df-unif 16694 df-hom 16695 df-cco 16696 df-rest 16802 df-topn 16803 df-0g 16821 df-gsum 16822 df-topgen 16823 df-pt 16824 df-prds 16827 df-xrs 16881 df-qtop 16886 df-imas 16887 df-xps 16889 df-mre 16963 df-mrc 16964 df-acs 16966 df-mgm 17971 df-sgrp 18020 df-mnd 18031 df-submnd 18076 df-mulg 18346 df-cntz 18568 df-cmn 19029 df-psmet 20212 df-xmet 20213 df-met 20214 df-bl 20215 df-mopn 20216 df-fbas 20217 df-fg 20218 df-cnfld 20221 df-top 21648 df-topon 21665 df-topsp 21687 df-bases 21700 df-cld 21773 df-ntr 21774 df-cls 21775 df-nei 21852 df-lp 21890 df-perf 21891 df-cn 21981 df-cnp 21982 df-haus 22069 df-tx 22316 df-hmeo 22509 df-fil 22600 df-fm 22692 df-flim 22693 df-flf 22694 df-xms 23076 df-ms 23077 df-tms 23078 df-cncf 23633 df-limc 24621 df-dv 24622

This theorem is referenced by: fourierdlem87 43299 fourierdlem95 43307 fourierdlem103 43315 fourierdlem104 43316

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