fourierdlem68 - Mathbox for Glauco Siliprandi

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Theorem fourierdlem68 42021

Description: The derivative of 𝑂 is bounded on the given interval. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
fourierdlem68.f	⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
fourierdlem68.xre	⊢ (𝜑 → 𝑋 ∈ ℝ)
fourierdlem68.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
fourierdlem68.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
fourierdlem68.altb	⊢ (𝜑 → 𝐴 < 𝐵)
fourierdlem68.ab	⊢ (𝜑 → (𝐴[,]𝐵) ⊆ (-π[,]π))
fourierdlem68.n0	⊢ (𝜑 → ¬ 0 ∈ (𝐴[,]𝐵))
fourierdlem68.fdv	⊢ (𝜑 → (ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))):((𝑋 + 𝐴)(,)(𝑋 + 𝐵))⟶ℝ)
fourierdlem68.d	⊢ (𝜑 → 𝐷 ∈ ℝ)
fourierdlem68.fbd	⊢ ((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘(𝐹‘𝑡)) ≤ 𝐷)
fourierdlem68.e	⊢ (𝜑 → 𝐸 ∈ ℝ)
fourierdlem68.fdvbd	⊢ ((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡)) ≤ 𝐸)
fourierdlem68.c	⊢ (𝜑 → 𝐶 ∈ ℝ)
fourierdlem68.o	⊢ 𝑂 = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2)))))

**Assertion**
Ref	Expression
fourierdlem68	⊢ (𝜑 → (dom (ℝ D 𝑂) = (𝐴(,)𝐵) ∧ ∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D 𝑂)‘𝑠)) ≤ 𝑏))

Distinct variable groups: 𝐴,𝑏,𝑠 𝑡,𝐴,𝑠 𝐵,𝑏,𝑠 𝑡,𝐵 𝐶,𝑏,𝑠 𝐷,𝑏,𝑠 𝑡,𝐷 𝐸,𝑏,𝑠 𝑡,𝐸 𝐹,𝑏,𝑠 𝑡,𝐹 𝑋,𝑏,𝑠 𝑡,𝑋 𝜑,𝑏,𝑠 𝜑,𝑡 Allowed substitution hints: 𝐶(𝑡) 𝑂(𝑡,𝑠,𝑏)

Proof of Theorem fourierdlem68 Dummy variable 𝑐 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		fourierdlem68.f	. . . . . 6 ⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
2		fourierdlem68.xre	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ ℝ)
3		fourierdlem68.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ)
4		fourierdlem68.b	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ)
5		fourierdlem68.fdv	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))):((𝑋 + 𝐴)(,)(𝑋 + 𝐵))⟶ℝ)
6		ioossicc 12672	. . . . . . 7 ⊢ (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵)
7		fourierdlem68.ab	. . . . . . 7 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ (-π[,]π))
8	6, 7	syl5ss 3900	. . . . . 6 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ (-π[,]π))
9		fourierdlem68.n0	. . . . . . 7 ⊢ (𝜑 → ¬ 0 ∈ (𝐴[,]𝐵))
10	6	sseli 3885	. . . . . . 7 ⊢ (0 ∈ (𝐴(,)𝐵) → 0 ∈ (𝐴[,]𝐵))
11	9, 10	nsyl 142	. . . . . 6 ⊢ (𝜑 → ¬ 0 ∈ (𝐴(,)𝐵))
12		fourierdlem68.c	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℝ)
13		fourierdlem68.o	. . . . . 6 ⊢ 𝑂 = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2)))))
14	1, 2, 3, 4, 5, 8, 11, 12, 13	fourierdlem57 42010	. . . . 5 ⊢ ((𝜑 → ((ℝ D 𝑂):(𝐴(,)𝐵)⟶ℝ ∧ (ℝ D 𝑂) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) · (2 · (sin‘(𝑠 / 2)))) − ((cos‘(𝑠 / 2)) · ((𝐹‘(𝑋 + 𝑠)) − 𝐶))) / ((2 · (sin‘(𝑠 / 2)))↑2))))) ∧ (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (2 · (sin‘(𝑠 / 2))))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (cos‘(𝑠 / 2))))
15	14	simpli 484	. . . 4 ⊢ (𝜑 → ((ℝ D 𝑂):(𝐴(,)𝐵)⟶ℝ ∧ (ℝ D 𝑂) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) · (2 · (sin‘(𝑠 / 2)))) − ((cos‘(𝑠 / 2)) · ((𝐹‘(𝑋 + 𝑠)) − 𝐶))) / ((2 · (sin‘(𝑠 / 2)))↑2)))))
16	15	simpld 495	. . 3 ⊢ (𝜑 → (ℝ D 𝑂):(𝐴(,)𝐵)⟶ℝ)
17	16	fdmd 6391	. 2 ⊢ (𝜑 → dom (ℝ D 𝑂) = (𝐴(,)𝐵))
18		eqid 2795	. . . . . 6 ⊢ (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2))))
19		fourierdlem68.altb	. . . . . . 7 ⊢ (𝜑 → 𝐴 < 𝐵)
20	3, 4, 19	ltled 10635	. . . . . 6 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
21		2re 11559	. . . . . . . . . . 11 ⊢ 2 ∈ ℝ
22	21	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 2 ∈ ℝ)
23	3, 4	iccssred 41341	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
24	23	sselda 3889	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑡 ∈ ℝ)
25	24	rehalfcld 11732	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (𝑡 / 2) ∈ ℝ)
26	25	resincld 15329	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (sin‘(𝑡 / 2)) ∈ ℝ)
27	22, 26	remulcld 10517	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (2 · (sin‘(𝑡 / 2))) ∈ ℝ)
28		2cnd 11563	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 2 ∈ ℂ)
29	26	recnd 10515	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (sin‘(𝑡 / 2)) ∈ ℂ)
30		2ne0 11589	. . . . . . . . . . 11 ⊢ 2 ≠ 0
31	30	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 2 ≠ 0)
32	7	sselda 3889	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑡 ∈ (-π[,]π))
33		eqcom 2802	. . . . . . . . . . . . . . . . 17 ⊢ (𝑡 = 0 ↔ 0 = 𝑡)
34	33	biimpi 217	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 = 0 → 0 = 𝑡)
35	34	adantl 482	. . . . . . . . . . . . . . 15 ⊢ ((𝑡 ∈ (𝐴[,]𝐵) ∧ 𝑡 = 0) → 0 = 𝑡)
36		simpl 483	. . . . . . . . . . . . . . 15 ⊢ ((𝑡 ∈ (𝐴[,]𝐵) ∧ 𝑡 = 0) → 𝑡 ∈ (𝐴[,]𝐵))
37	35, 36	eqeltrd 2883	. . . . . . . . . . . . . 14 ⊢ ((𝑡 ∈ (𝐴[,]𝐵) ∧ 𝑡 = 0) → 0 ∈ (𝐴[,]𝐵))
38	37	adantll 710	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) ∧ 𝑡 = 0) → 0 ∈ (𝐴[,]𝐵))
39	9	ad2antrr 722	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) ∧ 𝑡 = 0) → ¬ 0 ∈ (𝐴[,]𝐵))
40	38, 39	pm2.65da 813	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → ¬ 𝑡 = 0)
41	40	neqned 2991	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑡 ≠ 0)
42		fourierdlem44 41998	. . . . . . . . . . 11 ⊢ ((𝑡 ∈ (-π[,]π) ∧ 𝑡 ≠ 0) → (sin‘(𝑡 / 2)) ≠ 0)
43	32, 41, 42	syl2anc 584	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (sin‘(𝑡 / 2)) ≠ 0)
44	28, 29, 31, 43	mulne0d 11140	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (2 · (sin‘(𝑡 / 2))) ≠ 0)
45		eldifsn 4626	. . . . . . . . 9 ⊢ ((2 · (sin‘(𝑡 / 2))) ∈ (ℝ ∖ {0}) ↔ ((2 · (sin‘(𝑡 / 2))) ∈ ℝ ∧ (2 · (sin‘(𝑡 / 2))) ≠ 0))
46	27, 44, 45	sylanbrc 583	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (2 · (sin‘(𝑡 / 2))) ∈ (ℝ ∖ {0}))
47	46, 18	fmptd 6741	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))):(𝐴[,]𝐵)⟶(ℝ ∖ {0}))
48		difss 4029	. . . . . . . . . 10 ⊢ (ℝ ∖ {0}) ⊆ ℝ
49		ax-resscn 10440	. . . . . . . . . 10 ⊢ ℝ ⊆ ℂ
50	48, 49	sstri 3898	. . . . . . . . 9 ⊢ (ℝ ∖ {0}) ⊆ ℂ
51	50	a1i 11	. . . . . . . 8 ⊢ (𝜑 → (ℝ ∖ {0}) ⊆ ℂ)
52	23, 49	syl6ss 3901	. . . . . . . . . 10 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℂ)
53		2cnd 11563	. . . . . . . . . 10 ⊢ (𝜑 → 2 ∈ ℂ)
54		ssid 3910	. . . . . . . . . . 11 ⊢ ℂ ⊆ ℂ
55	54	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℂ ⊆ ℂ)
56	52, 53, 55	constcncfg 41715	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ 2) ∈ ((𝐴[,]𝐵)–cn→ℂ))
57		sincn 24715	. . . . . . . . . . 11 ⊢ sin ∈ (ℂ–cn→ℂ)
58	57	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → sin ∈ (ℂ–cn→ℂ))
59	52, 55	idcncfg 41716	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ 𝑡) ∈ ((𝐴[,]𝐵)–cn→ℂ))
60		eldifsn 4626	. . . . . . . . . . . . . 14 ⊢ (2 ∈ (ℂ ∖ {0}) ↔ (2 ∈ ℂ ∧ 2 ≠ 0))
61	28, 31, 60	sylanbrc 583	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 2 ∈ (ℂ ∖ {0}))
62		eqid 2795	. . . . . . . . . . . . 13 ⊢ (𝑡 ∈ (𝐴[,]𝐵) ↦ 2) = (𝑡 ∈ (𝐴[,]𝐵) ↦ 2)
63	61, 62	fmptd 6741	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ 2):(𝐴[,]𝐵)⟶(ℂ ∖ {0}))
64		difssd 4030	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℂ ∖ {0}) ⊆ ℂ)
65		cncffvrn 23189	. . . . . . . . . . . . 13 ⊢ (((ℂ ∖ {0}) ⊆ ℂ ∧ (𝑡 ∈ (𝐴[,]𝐵) ↦ 2) ∈ ((𝐴[,]𝐵)–cn→ℂ)) → ((𝑡 ∈ (𝐴[,]𝐵) ↦ 2) ∈ ((𝐴[,]𝐵)–cn→(ℂ ∖ {0})) ↔ (𝑡 ∈ (𝐴[,]𝐵) ↦ 2):(𝐴[,]𝐵)⟶(ℂ ∖ {0})))
66	64, 56, 65	syl2anc 584	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ 2) ∈ ((𝐴[,]𝐵)–cn→(ℂ ∖ {0})) ↔ (𝑡 ∈ (𝐴[,]𝐵) ↦ 2):(𝐴[,]𝐵)⟶(ℂ ∖ {0})))
67	63, 66	mpbird 258	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ 2) ∈ ((𝐴[,]𝐵)–cn→(ℂ ∖ {0})))
68	59, 67	divcncf 23731	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡 / 2)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
69	58, 68	cncfmpt1f 23204	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (sin‘(𝑡 / 2))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
70	56, 69	mulcncf 23730	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
71		cncffvrn 23189	. . . . . . . 8 ⊢ (((ℝ ∖ {0}) ⊆ ℂ ∧ (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) ∈ ((𝐴[,]𝐵)–cn→ℂ)) → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) ∈ ((𝐴[,]𝐵)–cn→(ℝ ∖ {0})) ↔ (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))):(𝐴[,]𝐵)⟶(ℝ ∖ {0})))
72	51, 70, 71	syl2anc 584	. . . . . . 7 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) ∈ ((𝐴[,]𝐵)–cn→(ℝ ∖ {0})) ↔ (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))):(𝐴[,]𝐵)⟶(ℝ ∖ {0})))
73	47, 72	mpbird 258	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (2 · (sin‘(𝑡 / 2)))) ∈ ((𝐴[,]𝐵)–cn→(ℝ ∖ {0})))
74	18, 3, 4, 20, 73	cncficcgt0 41732	. . . . 5 ⊢ (𝜑 → ∃𝑐 ∈ ℝ⁺ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2)))))
75		reelprrecn 10475	. . . . . . . 8 ⊢ ℝ ∈ {ℝ, ℂ}
76	75	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → ℝ ∈ {ℝ, ℂ})
77	1	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐹:ℝ⟶ℝ)
78	2	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑋 ∈ ℝ)
79		elioore 12618	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 𝑠 ∈ ℝ)
80	79	adantl 482	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 ∈ ℝ)
81	78, 80	readdcld 10516	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝑠) ∈ ℝ)
82	77, 81	ffvelrnd 6717	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
83	12	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐶 ∈ ℝ)
84	82, 83	resubcld 10916	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((𝐹‘(𝑋 + 𝑠)) − 𝐶) ∈ ℝ)
85	84	recnd 10515	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((𝐹‘(𝑋 + 𝑠)) − 𝐶) ∈ ℂ)
86	85	3ad2antl1 1178	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((𝐹‘(𝑋 + 𝑠)) − 𝐶) ∈ ℂ)
87	75	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
88	82	recnd 10515	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℂ)
89	5	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))):((𝑋 + 𝐴)(,)(𝑋 + 𝐵))⟶ℝ)
90	2, 3	readdcld 10516	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑋 + 𝐴) ∈ ℝ)
91	90	rexrd 10537	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋 + 𝐴) ∈ ℝ^*)
92	91	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝐴) ∈ ℝ^*)
93	2, 4	readdcld 10516	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑋 + 𝐵) ∈ ℝ)
94	93	rexrd 10537	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋 + 𝐵) ∈ ℝ^*)
95	94	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝐵) ∈ ℝ^*)
96	3	adantr 481	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐴 ∈ ℝ)
97	96	rexrd 10537	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐴 ∈ ℝ^*)
98	4	rexrd 10537	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
99	98	adantr 481	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐵 ∈ ℝ^*)
100		simpr 485	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 ∈ (𝐴(,)𝐵))
101		ioogtlb 41331	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐴 < 𝑠)
102	97, 99, 100, 101	syl3anc 1364	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐴 < 𝑠)
103	96, 80, 78, 102	ltadd2dd 10646	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝐴) < (𝑋 + 𝑠))
104	4	adantr 481	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐵 ∈ ℝ)
105		iooltub 41347	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 < 𝐵)
106	97, 99, 100, 105	syl3anc 1364	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 < 𝐵)
107	80, 104, 78, 106	ltadd2dd 10646	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝑠) < (𝑋 + 𝐵))
108	92, 95, 81, 103, 107	eliood 41334	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))
109	89, 108	ffvelrnd 6717	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) ∈ ℝ)
110		eqid 2795	. . . . . . . . . . 11 ⊢ (ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))) = (ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))
111	1, 2, 3, 4, 110, 5	fourierdlem28 41982	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (𝐹‘(𝑋 + 𝑠)))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))))
112	83	recnd 10515	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐶 ∈ ℂ)
113		0red 10490	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 0 ∈ ℝ)
114		iooretop 23057	. . . . . . . . . . . . 13 ⊢ (𝐴(,)𝐵) ∈ (topGen‘ran (,))
115		eqid 2795	. . . . . . . . . . . . . 14 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
116	115	tgioo2 23094	. . . . . . . . . . . . 13 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
117	114, 116	eleqtri 2881	. . . . . . . . . . . 12 ⊢ (𝐴(,)𝐵) ∈ ((TopOpen‘ℂ_fld) ↾_t ℝ)
118	117	a1i 11	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐴(,)𝐵) ∈ ((TopOpen‘ℂ_fld) ↾_t ℝ))
119	12	recnd 10515	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ ℂ)
120	87, 118, 119	dvmptconst 41760	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ 𝐶)) = (𝑠 ∈ (𝐴(,)𝐵) ↦ 0))
121	87, 88, 109, 111, 112, 113, 120	dvmptsub 24247	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘(𝑋 + 𝑠)) − 𝐶))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) − 0)))
122	109	recnd 10515	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) ∈ ℂ)
123	122	subid1d 10834	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) − 0) = ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)))
124	123	mpteq2dva 5055	. . . . . . . . 9 ⊢ (𝜑 → (𝑠 ∈ (𝐴(,)𝐵) ↦ (((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) − 0)) = (𝑠 ∈ (𝐴(,)𝐵) ↦ ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))))
125	121, 124	eqtrd 2831	. . . . . . . 8 ⊢ (𝜑 → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘(𝑋 + 𝑠)) − 𝐶))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))))
126	125	3ad2ant1 1126	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘(𝑋 + 𝑠)) − 𝐶))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))))
127	122	3ad2antl1 1178	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)) ∈ ℂ)
128		2cnd 11563	. . . . . . . . 9 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 2 ∈ ℂ)
129	79	recnd 10515	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 𝑠 ∈ ℂ)
130	129	halfcld 11730	. . . . . . . . . 10 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (𝑠 / 2) ∈ ℂ)
131	130	sincld 15316	. . . . . . . . 9 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (sin‘(𝑠 / 2)) ∈ ℂ)
132	128, 131	mulcld 10507	. . . . . . . 8 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (2 · (sin‘(𝑠 / 2))) ∈ ℂ)
133	132	adantl 482	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (2 · (sin‘(𝑠 / 2))) ∈ ℂ)
134		fourierdlem68.e	. . . . . . . 8 ⊢ (𝜑 → 𝐸 ∈ ℝ)
135	134	3ad2ant1 1126	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → 𝐸 ∈ ℝ)
136		1re 10487	. . . . . . . . 9 ⊢ 1 ∈ ℝ
137	21, 136	remulcli 10503	. . . . . . . 8 ⊢ (2 · 1) ∈ ℝ
138	137	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → (2 · 1) ∈ ℝ)
139		1red 10488	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → 1 ∈ ℝ)
140		fourierdlem68.d	. . . . . . . . 9 ⊢ (𝜑 → 𝐷 ∈ ℝ)
141	119	abscld 14630	. . . . . . . . 9 ⊢ (𝜑 → (abs‘𝐶) ∈ ℝ)
142	140, 141	readdcld 10516	. . . . . . . 8 ⊢ (𝜑 → (𝐷 + (abs‘𝐶)) ∈ ℝ)
143	142	3ad2ant1 1126	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → (𝐷 + (abs‘𝐶)) ∈ ℝ)
144		simpl 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝜑)
145	144, 108	jca 512	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))
146		eleq1 2870	. . . . . . . . . . . 12 ⊢ (𝑡 = (𝑋 + 𝑠) → (𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)) ↔ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))
147	146	anbi2d 628	. . . . . . . . . . 11 ⊢ (𝑡 = (𝑋 + 𝑠) → ((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) ↔ (𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)))))
148		fveq2 6538	. . . . . . . . . . . . 13 ⊢ (𝑡 = (𝑋 + 𝑠) → ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡) = ((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠)))
149	148	fveq2d 6542	. . . . . . . . . . . 12 ⊢ (𝑡 = (𝑋 + 𝑠) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡)) = (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))))
150	149	breq1d 4972	. . . . . . . . . . 11 ⊢ (𝑡 = (𝑋 + 𝑠) → ((abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡)) ≤ 𝐸 ↔ (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))) ≤ 𝐸))
151	147, 150	imbi12d 346	. . . . . . . . . 10 ⊢ (𝑡 = (𝑋 + 𝑠) → (((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡)) ≤ 𝐸) ↔ ((𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))) ≤ 𝐸)))
152		fourierdlem68.fdvbd	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘𝑡)) ≤ 𝐸)
153	151, 152	vtoclg 3510	. . . . . . . . 9 ⊢ ((𝑋 + 𝑠) ∈ ℝ → ((𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))) ≤ 𝐸))
154	81, 145, 153	sylc 65	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))) ≤ 𝐸)
155	154	3ad2antl1 1178	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((ℝ D (𝐹 ↾ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))))‘(𝑋 + 𝑠))) ≤ 𝐸)
156	128, 131	absmuld 14648	. . . . . . . . 9 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (abs‘(2 · (sin‘(𝑠 / 2)))) = ((abs‘2) · (abs‘(sin‘(𝑠 / 2)))))
157		0le2 11587	. . . . . . . . . . . 12 ⊢ 0 ≤ 2
158		absid 14490	. . . . . . . . . . . 12 ⊢ ((2 ∈ ℝ ∧ 0 ≤ 2) → (abs‘2) = 2)
159	21, 157, 158	mp2an 688	. . . . . . . . . . 11 ⊢ (abs‘2) = 2
160	159	oveq1i 7026	. . . . . . . . . 10 ⊢ ((abs‘2) · (abs‘(sin‘(𝑠 / 2)))) = (2 · (abs‘(sin‘(𝑠 / 2))))
161	131	abscld 14630	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (abs‘(sin‘(𝑠 / 2))) ∈ ℝ)
162		1red 10488	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 1 ∈ ℝ)
163	21	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 2 ∈ ℝ)
164	157	a1i 11	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → 0 ≤ 2)
165	79	rehalfcld 11732	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (𝑠 / 2) ∈ ℝ)
166		abssinbd 41122	. . . . . . . . . . . 12 ⊢ ((𝑠 / 2) ∈ ℝ → (abs‘(sin‘(𝑠 / 2))) ≤ 1)
167	165, 166	syl 17	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (abs‘(sin‘(𝑠 / 2))) ≤ 1)
168	161, 162, 163, 164, 167	lemul2ad 11428	. . . . . . . . . 10 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (2 · (abs‘(sin‘(𝑠 / 2)))) ≤ (2 · 1))
169	160, 168	eqbrtrid 4997	. . . . . . . . 9 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → ((abs‘2) · (abs‘(sin‘(𝑠 / 2)))) ≤ (2 · 1))
170	156, 169	eqbrtrd 4984	. . . . . . . 8 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (abs‘(2 · (sin‘(𝑠 / 2)))) ≤ (2 · 1))
171	170	adantl 482	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘(2 · (sin‘(𝑠 / 2)))) ≤ (2 · 1))
172		abscosbd 41104	. . . . . . . . 9 ⊢ ((𝑠 / 2) ∈ ℝ → (abs‘(cos‘(𝑠 / 2))) ≤ 1)
173	100, 165, 172	3syl 18	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘(cos‘(𝑠 / 2))) ≤ 1)
174	173	3ad2antl1 1178	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘(cos‘(𝑠 / 2))) ≤ 1)
175	85	abscld 14630	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((𝐹‘(𝑋 + 𝑠)) − 𝐶)) ∈ ℝ)
176	88	abscld 14630	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘(𝐹‘(𝑋 + 𝑠))) ∈ ℝ)
177	112	abscld 14630	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘𝐶) ∈ ℝ)
178	176, 177	readdcld 10516	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((abs‘(𝐹‘(𝑋 + 𝑠))) + (abs‘𝐶)) ∈ ℝ)
179	140	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝐷 ∈ ℝ)
180	179, 177	readdcld 10516	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (𝐷 + (abs‘𝐶)) ∈ ℝ)
181	88, 112	abs2dif2d 14652	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((𝐹‘(𝑋 + 𝑠)) − 𝐶)) ≤ ((abs‘(𝐹‘(𝑋 + 𝑠))) + (abs‘𝐶)))
182		fveq2 6538	. . . . . . . . . . . . . . 15 ⊢ (𝑡 = (𝑋 + 𝑠) → (𝐹‘𝑡) = (𝐹‘(𝑋 + 𝑠)))
183	182	fveq2d 6542	. . . . . . . . . . . . . 14 ⊢ (𝑡 = (𝑋 + 𝑠) → (abs‘(𝐹‘𝑡)) = (abs‘(𝐹‘(𝑋 + 𝑠))))
184	183	breq1d 4972	. . . . . . . . . . . . 13 ⊢ (𝑡 = (𝑋 + 𝑠) → ((abs‘(𝐹‘𝑡)) ≤ 𝐷 ↔ (abs‘(𝐹‘(𝑋 + 𝑠))) ≤ 𝐷))
185	147, 184	imbi12d 346	. . . . . . . . . . . 12 ⊢ (𝑡 = (𝑋 + 𝑠) → (((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘(𝐹‘𝑡)) ≤ 𝐷) ↔ ((𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘(𝐹‘(𝑋 + 𝑠))) ≤ 𝐷)))
186		fourierdlem68.fbd	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘(𝐹‘𝑡)) ≤ 𝐷)
187	185, 186	vtoclg 3510	. . . . . . . . . . 11 ⊢ ((𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵)) → ((𝜑 ∧ (𝑋 + 𝑠) ∈ ((𝑋 + 𝐴)(,)(𝑋 + 𝐵))) → (abs‘(𝐹‘(𝑋 + 𝑠))) ≤ 𝐷))
188	108, 145, 187	sylc 65	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘(𝐹‘(𝑋 + 𝑠))) ≤ 𝐷)
189	176, 179, 177, 188	leadd1dd 11102	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ((abs‘(𝐹‘(𝑋 + 𝑠))) + (abs‘𝐶)) ≤ (𝐷 + (abs‘𝐶)))
190	175, 178, 180, 181, 189	letrd 10644	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((𝐹‘(𝑋 + 𝑠)) − 𝐶)) ≤ (𝐷 + (abs‘𝐶)))
191	190	3ad2antl1 1178	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (abs‘((𝐹‘(𝑋 + 𝑠)) − 𝐶)) ≤ (𝐷 + (abs‘𝐶)))
192	14	simpri 486	. . . . . . . 8 ⊢ (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (2 · (sin‘(𝑠 / 2))))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (cos‘(𝑠 / 2)))
193	192	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (2 · (sin‘(𝑠 / 2))))) = (𝑠 ∈ (𝐴(,)𝐵) ↦ (cos‘(𝑠 / 2))))
194	130	coscld 15317	. . . . . . . 8 ⊢ (𝑠 ∈ (𝐴(,)𝐵) → (cos‘(𝑠 / 2)) ∈ ℂ)
195	194	adantl 482	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → (cos‘(𝑠 / 2)) ∈ ℂ)
196		simp2 1130	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → 𝑐 ∈ ℝ⁺)
197		oveq1 7023	. . . . . . . . . . . . . 14 ⊢ (𝑡 = 𝑠 → (𝑡 / 2) = (𝑠 / 2))
198	197	fveq2d 6542	. . . . . . . . . . . . 13 ⊢ (𝑡 = 𝑠 → (sin‘(𝑡 / 2)) = (sin‘(𝑠 / 2)))
199	198	oveq2d 7032	. . . . . . . . . . . 12 ⊢ (𝑡 = 𝑠 → (2 · (sin‘(𝑡 / 2))) = (2 · (sin‘(𝑠 / 2))))
200	199	fveq2d 6542	. . . . . . . . . . 11 ⊢ (𝑡 = 𝑠 → (abs‘(2 · (sin‘(𝑡 / 2)))) = (abs‘(2 · (sin‘(𝑠 / 2)))))
201	200	breq2d 4974	. . . . . . . . . 10 ⊢ (𝑡 = 𝑠 → (𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2)))) ↔ 𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))))
202	201	cbvralv 3403	. . . . . . . . 9 ⊢ (∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2)))) ↔ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
203		nfv 1892	. . . . . . . . . . 11 ⊢ Ⅎ𝑠𝜑
204		nfra1 3186	. . . . . . . . . . 11 ⊢ Ⅎ𝑠∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))
205	203, 204	nfan 1881	. . . . . . . . . 10 ⊢ Ⅎ𝑠(𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
206		simplr 765	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
207	6, 100	sseldi 3887	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 ∈ (𝐴[,]𝐵))
208	207	adantlr 711	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑠 ∈ (𝐴[,]𝐵))
209		rspa 3173	. . . . . . . . . . . 12 ⊢ ((∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))) ∧ 𝑠 ∈ (𝐴[,]𝐵)) → 𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
210	206, 208, 209	syl2anc 584	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))) ∧ 𝑠 ∈ (𝐴(,)𝐵)) → 𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
211	210	ex 413	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))) → (𝑠 ∈ (𝐴(,)𝐵) → 𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))))
212	205, 211	ralrimi 3183	. . . . . . . . 9 ⊢ ((𝜑 ∧ ∀𝑠 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2))))) → ∀𝑠 ∈ (𝐴(,)𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
213	202, 212	sylan2b 593	. . . . . . . 8 ⊢ ((𝜑 ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → ∀𝑠 ∈ (𝐴(,)𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
214	213	3adant2 1124	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → ∀𝑠 ∈ (𝐴(,)𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑠 / 2)))))
215		eqid 2795	. . . . . . 7 ⊢ (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2)))))) = (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))
216	76, 86, 126, 127, 133, 135, 138, 139, 143, 155, 171, 174, 191, 193, 195, 196, 214, 215	dvdivbd 41769	. . . . . 6 ⊢ ((𝜑 ∧ 𝑐 ∈ ℝ⁺ ∧ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2))))) → ∃𝑏 ∈ ℝ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏)
217	216	rexlimdv3a 3249	. . . . 5 ⊢ (𝜑 → (∃𝑐 ∈ ℝ⁺ ∀𝑡 ∈ (𝐴[,]𝐵)𝑐 ≤ (abs‘(2 · (sin‘(𝑡 / 2)))) → ∃𝑏 ∈ ℝ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
218	74, 217	mpd 15	. . . 4 ⊢ (𝜑 → ∃𝑏 ∈ ℝ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏)
219		nfcv 2949	. . . . . . . . 9 ⊢ Ⅎ𝑠ℝ
220		nfcv 2949	. . . . . . . . 9 ⊢ Ⅎ𝑠 D
221		nfmpt1 5058	. . . . . . . . . 10 ⊢ Ⅎ𝑠(𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2)))))
222	13, 221	nfcxfr 2947	. . . . . . . . 9 ⊢ Ⅎ𝑠𝑂
223	219, 220, 222	nfov 7046	. . . . . . . 8 ⊢ Ⅎ𝑠(ℝ D 𝑂)
224	223	nfdm 5705	. . . . . . 7 ⊢ Ⅎ𝑠dom (ℝ D 𝑂)
225		nfcv 2949	. . . . . . 7 ⊢ Ⅎ𝑠(𝐴(,)𝐵)
226	224, 225	raleqf 3357	. . . . . 6 ⊢ (dom (ℝ D 𝑂) = (𝐴(,)𝐵) → (∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏 ↔ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
227	17, 226	syl 17	. . . . 5 ⊢ (𝜑 → (∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏 ↔ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
228	227	rexbidv 3260	. . . 4 ⊢ (𝜑 → (∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏 ↔ ∃𝑏 ∈ ℝ ∀𝑠 ∈ (𝐴(,)𝐵)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
229	218, 228	mpbird 258	. . 3 ⊢ (𝜑 → ∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏)
230	13	a1i 11	. . . . . . . 8 ⊢ (𝜑 → 𝑂 = (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))
231	230	oveq2d 7032	. . . . . . 7 ⊢ (𝜑 → (ℝ D 𝑂) = (ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2)))))))
232	231	fveq1d 6540	. . . . . 6 ⊢ (𝜑 → ((ℝ D 𝑂)‘𝑠) = ((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠))
233	232	fveq2d 6542	. . . . 5 ⊢ (𝜑 → (abs‘((ℝ D 𝑂)‘𝑠)) = (abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)))
234	233	breq1d 4972	. . . 4 ⊢ (𝜑 → ((abs‘((ℝ D 𝑂)‘𝑠)) ≤ 𝑏 ↔ (abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
235	234	rexralbidv 3264	. . 3 ⊢ (𝜑 → (∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D 𝑂)‘𝑠)) ≤ 𝑏 ↔ ∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D (𝑠 ∈ (𝐴(,)𝐵) ↦ (((𝐹‘(𝑋 + 𝑠)) − 𝐶) / (2 · (sin‘(𝑠 / 2))))))‘𝑠)) ≤ 𝑏))
236	229, 235	mpbird 258	. 2 ⊢ (𝜑 → ∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D 𝑂)‘𝑠)) ≤ 𝑏)
237	17, 236	jca 512	1 ⊢ (𝜑 → (dom (ℝ D 𝑂) = (𝐴(,)𝐵) ∧ ∃𝑏 ∈ ℝ ∀𝑠 ∈ dom (ℝ D 𝑂)(abs‘((ℝ D 𝑂)‘𝑠)) ≤ 𝑏))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 ∧ w3a 1080 = wceq 1522 ∈ wcel 2081 ≠ wne 2984 ∀wral 3105 ∃wrex 3106 ∖ cdif 3856 ⊆ wss 3859 {csn 4472 {cpr 4474 class class class wbr 4962 ↦ cmpt 5041 dom cdm 5443 ran crn 5444 ↾ cres 5445 ⟶wf 6221 ‘cfv 6225 (class class class)co 7016 ℂcc 10381 ℝcr 10382 0cc0 10383 1c1 10384 + caddc 10386 · cmul 10388 ℝ^*cxr 10520 < clt 10521 ≤ cle 10522 − cmin 10717 -cneg 10718 / cdiv 11145 2c2 11540 ℝ⁺crp 12239 (,)cioo 12588 [,]cicc 12591 ↑cexp 13279 abscabs 14427 sincsin 15250 cosccos 15251 πcpi 15253 ↾_t crest 16523 TopOpenctopn 16524 topGenctg 16540 ℂ_fldccnfld 20227 –cn→ccncf 23167 D cdv 24144

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1777 ax-4 1791 ax-5 1888 ax-6 1947 ax-7 1992 ax-8 2083 ax-9 2091 ax-10 2112 ax-11 2126 ax-12 2141 ax-13 2344 ax-ext 2769 ax-rep 5081 ax-sep 5094 ax-nul 5101 ax-pow 5157 ax-pr 5221 ax-un 7319 ax-inf2 8950 ax-cnex 10439 ax-resscn 10440 ax-1cn 10441 ax-icn 10442 ax-addcl 10443 ax-addrcl 10444 ax-mulcl 10445 ax-mulrcl 10446 ax-mulcom 10447 ax-addass 10448 ax-mulass 10449 ax-distr 10450 ax-i2m1 10451 ax-1ne0 10452 ax-1rid 10453 ax-rnegex 10454 ax-rrecex 10455 ax-cnre 10456 ax-pre-lttri 10457 ax-pre-lttrn 10458 ax-pre-ltadd 10459 ax-pre-mulgt0 10460 ax-pre-sup 10461 ax-addf 10462 ax-mulf 10463

This theorem depends on definitions: df-bi 208 df-an 397 df-or 843 df-3or 1081 df-3an 1082 df-tru 1525 df-fal 1535 df-ex 1762 df-nf 1766 df-sb 2043 df-mo 2576 df-eu 2612 df-clab 2776 df-cleq 2788 df-clel 2863 df-nfc 2935 df-ne 2985 df-nel 3091 df-ral 3110 df-rex 3111 df-reu 3112 df-rmo 3113 df-rab 3114 df-v 3439 df-sbc 3707 df-csb 3812 df-dif 3862 df-un 3864 df-in 3866 df-ss 3874 df-pss 3876 df-nul 4212 df-if 4382 df-pw 4455 df-sn 4473 df-pr 4475 df-tp 4477 df-op 4479 df-uni 4746 df-int 4783 df-iun 4827 df-iin 4828 df-br 4963 df-opab 5025 df-mpt 5042 df-tr 5064 df-id 5348 df-eprel 5353 df-po 5362 df-so 5363 df-fr 5402 df-se 5403 df-we 5404 df-xp 5449 df-rel 5450 df-cnv 5451 df-co 5452 df-dm 5453 df-rn 5454 df-res 5455 df-ima 5456 df-pred 6023 df-ord 6069 df-on 6070 df-lim 6071 df-suc 6072 df-iota 6189 df-fun 6227 df-fn 6228 df-f 6229 df-f1 6230 df-fo 6231 df-f1o 6232 df-fv 6233 df-isom 6234 df-riota 6977 df-ov 7019 df-oprab 7020 df-mpo 7021 df-of 7267 df-om 7437 df-1st 7545 df-2nd 7546 df-supp 7682 df-wrecs 7798 df-recs 7860 df-rdg 7898 df-1o 7953 df-2o 7954 df-oadd 7957 df-er 8139 df-map 8258 df-pm 8259 df-ixp 8311 df-en 8358 df-dom 8359 df-sdom 8360 df-fin 8361 df-fsupp 8680 df-fi 8721 df-sup 8752 df-inf 8753 df-oi 8820 df-card 9214 df-pnf 10523 df-mnf 10524 df-xr 10525 df-ltxr 10526 df-le 10527 df-sub 10719 df-neg 10720 df-div 11146 df-nn 11487 df-2 11548 df-3 11549 df-4 11550 df-5 11551 df-6 11552 df-7 11553 df-8 11554 df-9 11555 df-n0 11746 df-z 11830 df-dec 11948 df-uz 12094 df-q 12198 df-rp 12240 df-xneg 12357 df-xadd 12358 df-xmul 12359 df-ioo 12592 df-ioc 12593 df-ico 12594 df-icc 12595 df-fz 12743 df-fzo 12884 df-fl 13012 df-mod 13088 df-seq 13220 df-exp 13280 df-fac 13484 df-bc 13513 df-hash 13541 df-shft 14260 df-cj 14292 df-re 14293 df-im 14294 df-sqrt 14428 df-abs 14429 df-limsup 14662 df-clim 14679 df-rlim 14680 df-sum 14877 df-ef 15254 df-sin 15256 df-cos 15257 df-pi 15259 df-struct 16314 df-ndx 16315 df-slot 16316 df-base 16318 df-sets 16319 df-ress 16320 df-plusg 16407 df-mulr 16408 df-starv 16409 df-sca 16410 df-vsca 16411 df-ip 16412 df-tset 16413 df-ple 16414 df-ds 16416 df-unif 16417 df-hom 16418 df-cco 16419 df-rest 16525 df-topn 16526 df-0g 16544 df-gsum 16545 df-topgen 16546 df-pt 16547 df-prds 16550 df-xrs 16604 df-qtop 16609 df-imas 16610 df-xps 16612 df-mre 16686 df-mrc 16687 df-acs 16689 df-mgm 17681 df-sgrp 17723 df-mnd 17734 df-submnd 17775 df-mulg 17982 df-cntz 18188 df-cmn 18635 df-psmet 20219 df-xmet 20220 df-met 20221 df-bl 20222 df-mopn 20223 df-fbas 20224 df-fg 20225 df-cnfld 20228 df-top 21186 df-topon 21203 df-topsp 21225 df-bases 21238 df-cld 21311 df-ntr 21312 df-cls 21313 df-nei 21390 df-lp 21428 df-perf 21429 df-cn 21519 df-cnp 21520 df-t1 21606 df-haus 21607 df-cmp 21679 df-tx 21854 df-hmeo 22047 df-fil 22138 df-fm 22230 df-flim 22231 df-flf 22232 df-xms 22613 df-ms 22614 df-tms 22615 df-cncf 23169 df-limc 24147 df-dv 24148

This theorem is referenced by: fourierdlem80 42033

W3C validator