fourierdlem43 - Mathbox for Glauco Siliprandi

	Mathbox for Glauco Siliprandi		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > fourierdlem43		Structured version Visualization version GIF version

Theorem fourierdlem43 45165

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

**Hypothesis**
Ref	Expression
fourierdlem43.1	⊢ 𝐾 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))

**Assertion**
Ref	Expression
fourierdlem43	⊢ 𝐾:(-π[,]π)⟶ℝ

**Proof of Theorem fourierdlem43**
Step	Hyp	Ref	Expression
1		fourierdlem43.1	. 2 ⊢ 𝐾 = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))
2		1red 11220	. . 3 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 𝑠 = 0) → 1 ∈ ℝ)
3		pire 26205	. . . . . . . 8 ⊢ π ∈ ℝ
4	3	a1i 11	. . . . . . 7 ⊢ (𝑠 ∈ (-π[,]π) → π ∈ ℝ)
5	4	renegcld 11646	. . . . . 6 ⊢ (𝑠 ∈ (-π[,]π) → -π ∈ ℝ)
6		id 22	. . . . . 6 ⊢ (𝑠 ∈ (-π[,]π) → 𝑠 ∈ (-π[,]π))
7		eliccre 44517	. . . . . 6 ⊢ ((-π ∈ ℝ ∧ π ∈ ℝ ∧ 𝑠 ∈ (-π[,]π)) → 𝑠 ∈ ℝ)
8	5, 4, 6, 7	syl3anc 1370	. . . . 5 ⊢ (𝑠 ∈ (-π[,]π) → 𝑠 ∈ ℝ)
9	8	adantr 480	. . . 4 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → 𝑠 ∈ ℝ)
10		2re 12291	. . . . . 6 ⊢ 2 ∈ ℝ
11	10	a1i 11	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → 2 ∈ ℝ)
12	9	rehalfcld 12464	. . . . . 6 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (𝑠 / 2) ∈ ℝ)
13	12	resincld 16091	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (sin‘(𝑠 / 2)) ∈ ℝ)
14	11, 13	remulcld 11249	. . . 4 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (2 · (sin‘(𝑠 / 2))) ∈ ℝ)
15		2cnd 12295	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → 2 ∈ ℂ)
16	13	recnd 11247	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (sin‘(𝑠 / 2)) ∈ ℂ)
17		2ne0 12321	. . . . . 6 ⊢ 2 ≠ 0
18	17	a1i 11	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → 2 ≠ 0)
19		0xr 11266	. . . . . . . . . 10 ⊢ 0 ∈ ℝ^*
20	19	a1i 11	. . . . . . . . 9 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → 0 ∈ ℝ^*)
21	10, 3	remulcli 11235	. . . . . . . . . . 11 ⊢ (2 · π) ∈ ℝ
22	21	rexri 11277	. . . . . . . . . 10 ⊢ (2 · π) ∈ ℝ^*
23	22	a1i 11	. . . . . . . . 9 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → (2 · π) ∈ ℝ^*)
24	8	adantr 480	. . . . . . . . 9 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → 𝑠 ∈ ℝ)
25		simpr 484	. . . . . . . . 9 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → 0 < 𝑠)
26	21	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,]π) → (2 · π) ∈ ℝ)
27	5	rexrd 11269	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,]π) → -π ∈ ℝ^*)
28	4	rexrd 11269	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,]π) → π ∈ ℝ^*)
29		iccleub 13384	. . . . . . . . . . . 12 ⊢ ((-π ∈ ℝ^* ∧ π ∈ ℝ^* ∧ 𝑠 ∈ (-π[,]π)) → 𝑠 ≤ π)
30	27, 28, 6, 29	syl3anc 1370	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,]π) → 𝑠 ≤ π)
31		pirp 26208	. . . . . . . . . . . . 13 ⊢ π ∈ ℝ⁺
32		2timesgt 44297	. . . . . . . . . . . . 13 ⊢ (π ∈ ℝ⁺ → π < (2 · π))
33	31, 32	ax-mp 5	. . . . . . . . . . . 12 ⊢ π < (2 · π)
34	33	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,]π) → π < (2 · π))
35	8, 4, 26, 30, 34	lelttrd 11377	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,]π) → 𝑠 < (2 · π))
36	35	adantr 480	. . . . . . . . 9 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → 𝑠 < (2 · π))
37	20, 23, 24, 25, 36	eliood 44510	. . . . . . . 8 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → 𝑠 ∈ (0(,)(2 · π)))
38		sinaover2ne0 44883	. . . . . . . 8 ⊢ (𝑠 ∈ (0(,)(2 · π)) → (sin‘(𝑠 / 2)) ≠ 0)
39	37, 38	syl 17	. . . . . . 7 ⊢ ((𝑠 ∈ (-π[,]π) ∧ 0 < 𝑠) → (sin‘(𝑠 / 2)) ≠ 0)
40	39	adantlr 712	. . . . . 6 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ 0 < 𝑠) → (sin‘(𝑠 / 2)) ≠ 0)
41	8	ad2antrr 723	. . . . . . . 8 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → 𝑠 ∈ ℝ)
42		iccgelb 13385	. . . . . . . . . 10 ⊢ ((-π ∈ ℝ^* ∧ π ∈ ℝ^* ∧ 𝑠 ∈ (-π[,]π)) → -π ≤ 𝑠)
43	27, 28, 6, 42	syl3anc 1370	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,]π) → -π ≤ 𝑠)
44	43	ad2antrr 723	. . . . . . . 8 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → -π ≤ 𝑠)
45		0red 11222	. . . . . . . . 9 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → 0 ∈ ℝ)
46		neqne 2947	. . . . . . . . . 10 ⊢ (¬ 𝑠 = 0 → 𝑠 ≠ 0)
47	46	ad2antlr 724	. . . . . . . . 9 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → 𝑠 ≠ 0)
48		simpr 484	. . . . . . . . 9 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → ¬ 0 < 𝑠)
49	41, 45, 47, 48	lttri5d 44308	. . . . . . . 8 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → 𝑠 < 0)
50	5	ad2antrr 723	. . . . . . . . 9 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → -π ∈ ℝ)
51		elico2 13393	. . . . . . . . 9 ⊢ ((-π ∈ ℝ ∧ 0 ∈ ℝ^*) → (𝑠 ∈ (-π[,)0) ↔ (𝑠 ∈ ℝ ∧ -π ≤ 𝑠 ∧ 𝑠 < 0)))
52	50, 19, 51	sylancl 585	. . . . . . . 8 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → (𝑠 ∈ (-π[,)0) ↔ (𝑠 ∈ ℝ ∧ -π ≤ 𝑠 ∧ 𝑠 < 0)))
53	41, 44, 49, 52	mpbir3and 1341	. . . . . . 7 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → 𝑠 ∈ (-π[,)0))
54	3	renegcli 11526	. . . . . . . . . . . . . . 15 ⊢ -π ∈ ℝ
55		elicore 13381	. . . . . . . . . . . . . . 15 ⊢ ((-π ∈ ℝ ∧ 𝑠 ∈ (-π[,)0)) → 𝑠 ∈ ℝ)
56	54, 55	mpan 687	. . . . . . . . . . . . . 14 ⊢ (𝑠 ∈ (-π[,)0) → 𝑠 ∈ ℝ)
57	56	recnd 11247	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → 𝑠 ∈ ℂ)
58		2cnd 12295	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → 2 ∈ ℂ)
59	17	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → 2 ≠ 0)
60	57, 58, 59	divnegd 12008	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → -(𝑠 / 2) = (-𝑠 / 2))
61	60	eqcomd 2737	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → (-𝑠 / 2) = -(𝑠 / 2))
62	61	fveq2d 6895	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘(-𝑠 / 2)) = (sin‘-(𝑠 / 2)))
63	62	negeqd 11459	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,)0) → -(sin‘(-𝑠 / 2)) = -(sin‘-(𝑠 / 2)))
64	57	halfcld 12462	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → (𝑠 / 2) ∈ ℂ)
65		sinneg 16094	. . . . . . . . . . 11 ⊢ ((𝑠 / 2) ∈ ℂ → (sin‘-(𝑠 / 2)) = -(sin‘(𝑠 / 2)))
66	64, 65	syl 17	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘-(𝑠 / 2)) = -(sin‘(𝑠 / 2)))
67	66	negeqd 11459	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,)0) → -(sin‘-(𝑠 / 2)) = --(sin‘(𝑠 / 2)))
68	64	sincld 16078	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘(𝑠 / 2)) ∈ ℂ)
69	68	negnegd 11567	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,)0) → --(sin‘(𝑠 / 2)) = (sin‘(𝑠 / 2)))
70	63, 67, 69	3eqtrd 2775	. . . . . . . 8 ⊢ (𝑠 ∈ (-π[,)0) → -(sin‘(-𝑠 / 2)) = (sin‘(𝑠 / 2)))
71	57	negcld 11563	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → -𝑠 ∈ ℂ)
72	71	halfcld 12462	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,)0) → (-𝑠 / 2) ∈ ℂ)
73	72	sincld 16078	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘(-𝑠 / 2)) ∈ ℂ)
74	19	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → 0 ∈ ℝ^*)
75	22	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → (2 · π) ∈ ℝ^*)
76	56	renegcld 11646	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → -𝑠 ∈ ℝ)
77	54	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝑠 ∈ (-π[,)0) → -π ∈ ℝ)
78	77	rexrd 11269	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → -π ∈ ℝ^*)
79		id 22	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → 𝑠 ∈ (-π[,)0))
80		icoltub 44520	. . . . . . . . . . . . 13 ⊢ ((-π ∈ ℝ^* ∧ 0 ∈ ℝ^* ∧ 𝑠 ∈ (-π[,)0)) → 𝑠 < 0)
81	78, 74, 79, 80	syl3anc 1370	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → 𝑠 < 0)
82	56	lt0neg1d 11788	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → (𝑠 < 0 ↔ 0 < -𝑠))
83	81, 82	mpbid 231	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → 0 < -𝑠)
84	3	a1i 11	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → π ∈ ℝ)
85	21	a1i 11	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → (2 · π) ∈ ℝ)
86		icogelb 13380	. . . . . . . . . . . . . 14 ⊢ ((-π ∈ ℝ^* ∧ 0 ∈ ℝ^* ∧ 𝑠 ∈ (-π[,)0)) → -π ≤ 𝑠)
87	78, 74, 79, 86	syl3anc 1370	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (-π[,)0) → -π ≤ 𝑠)
88	84, 56, 87	lenegcon1d 11801	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → -𝑠 ≤ π)
89	33	a1i 11	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,)0) → π < (2 · π))
90	76, 84, 85, 88, 89	lelttrd 11377	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π[,)0) → -𝑠 < (2 · π))
91	74, 75, 76, 83, 90	eliood 44510	. . . . . . . . . 10 ⊢ (𝑠 ∈ (-π[,)0) → -𝑠 ∈ (0(,)(2 · π)))
92		sinaover2ne0 44883	. . . . . . . . . 10 ⊢ (-𝑠 ∈ (0(,)(2 · π)) → (sin‘(-𝑠 / 2)) ≠ 0)
93	91, 92	syl 17	. . . . . . . . 9 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘(-𝑠 / 2)) ≠ 0)
94	73, 93	negne0d 11574	. . . . . . . 8 ⊢ (𝑠 ∈ (-π[,)0) → -(sin‘(-𝑠 / 2)) ≠ 0)
95	70, 94	eqnetrrd 3008	. . . . . . 7 ⊢ (𝑠 ∈ (-π[,)0) → (sin‘(𝑠 / 2)) ≠ 0)
96	53, 95	syl 17	. . . . . 6 ⊢ (((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) ∧ ¬ 0 < 𝑠) → (sin‘(𝑠 / 2)) ≠ 0)
97	40, 96	pm2.61dan 810	. . . . 5 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (sin‘(𝑠 / 2)) ≠ 0)
98	15, 16, 18, 97	mulne0d 11871	. . . 4 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (2 · (sin‘(𝑠 / 2))) ≠ 0)
99	9, 14, 98	redivcld 12047	. . 3 ⊢ ((𝑠 ∈ (-π[,]π) ∧ ¬ 𝑠 = 0) → (𝑠 / (2 · (sin‘(𝑠 / 2)))) ∈ ℝ)
100	2, 99	ifclda 4563	. 2 ⊢ (𝑠 ∈ (-π[,]π) → if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))) ∈ ℝ)
101	1, 100	fmpti 7113	1 ⊢ 𝐾:(-π[,]π)⟶ℝ

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 ↔ wb 205 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2105 ≠ wne 2939 ifcif 4528 class class class wbr 5148 ↦ cmpt 5231 ⟶wf 6539 ‘cfv 6543 (class class class)co 7412 ℂcc 11112 ℝcr 11113 0cc0 11114 1c1 11115 · cmul 11119 ℝ^*cxr 11252 < clt 11253 ≤ cle 11254 -cneg 11450 / cdiv 11876 2c2 12272 ℝ⁺crp 12979 (,)cioo 13329 [,)cico 13331 [,]cicc 13332 sincsin 16012 πcpi 16015

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-inf2 9640 ax-cnex 11170 ax-resscn 11171 ax-1cn 11172 ax-icn 11173 ax-addcl 11174 ax-addrcl 11175 ax-mulcl 11176 ax-mulrcl 11177 ax-mulcom 11178 ax-addass 11179 ax-mulass 11180 ax-distr 11181 ax-i2m1 11182 ax-1ne0 11183 ax-1rid 11184 ax-rnegex 11185 ax-rrecex 11186 ax-cnre 11187 ax-pre-lttri 11188 ax-pre-lttrn 11189 ax-pre-ltadd 11190 ax-pre-mulgt0 11191 ax-pre-sup 11192 ax-addf 11193

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7674 df-om 7860 df-1st 7979 df-2nd 7980 df-supp 8151 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-1o 8470 df-2o 8471 df-er 8707 df-map 8826 df-pm 8827 df-ixp 8896 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-fsupp 9366 df-fi 9410 df-sup 9441 df-inf 9442 df-oi 9509 df-card 9938 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-div 11877 df-nn 12218 df-2 12280 df-3 12281 df-4 12282 df-5 12283 df-6 12284 df-7 12285 df-8 12286 df-9 12287 df-n0 12478 df-z 12564 df-dec 12683 df-uz 12828 df-q 12938 df-rp 12980 df-xneg 13097 df-xadd 13098 df-xmul 13099 df-ioo 13333 df-ioc 13334 df-ico 13335 df-icc 13336 df-fz 13490 df-fzo 13633 df-fl 13762 df-mod 13840 df-seq 13972 df-exp 14033 df-fac 14239 df-bc 14268 df-hash 14296 df-shft 15019 df-cj 15051 df-re 15052 df-im 15053 df-sqrt 15187 df-abs 15188 df-limsup 15420 df-clim 15437 df-rlim 15438 df-sum 15638 df-ef 16016 df-sin 16018 df-cos 16019 df-pi 16021 df-struct 17085 df-sets 17102 df-slot 17120 df-ndx 17132 df-base 17150 df-ress 17179 df-plusg 17215 df-mulr 17216 df-starv 17217 df-sca 17218 df-vsca 17219 df-ip 17220 df-tset 17221 df-ple 17222 df-ds 17224 df-unif 17225 df-hom 17226 df-cco 17227 df-rest 17373 df-topn 17374 df-0g 17392 df-gsum 17393 df-topgen 17394 df-pt 17395 df-prds 17398 df-xrs 17453 df-qtop 17458 df-imas 17459 df-xps 17461 df-mre 17535 df-mrc 17536 df-acs 17538 df-mgm 18566 df-sgrp 18645 df-mnd 18661 df-submnd 18707 df-mulg 18988 df-cntz 19223 df-cmn 19692 df-psmet 21137 df-xmet 21138 df-met 21139 df-bl 21140 df-mopn 21141 df-fbas 21142 df-fg 21143 df-cnfld 21146 df-top 22617 df-topon 22634 df-topsp 22656 df-bases 22670 df-cld 22744 df-ntr 22745 df-cls 22746 df-nei 22823 df-lp 22861 df-perf 22862 df-cn 22952 df-cnp 22953 df-haus 23040 df-tx 23287 df-hmeo 23480 df-fil 23571 df-fm 23663 df-flim 23664 df-flf 23665 df-xms 24047 df-ms 24048 df-tms 24049 df-cncf 24619 df-limc 25616 df-dv 25617

This theorem is referenced by: fourierdlem55 45176 fourierdlem62 45183 fourierdlem66 45187 fourierdlem77 45198 fourierdlem85 45206 fourierdlem88 45209 fourierdlem103 45224 fourierdlem104 45225

W3C validator