fourierdlem31 - Mathbox for Glauco Siliprandi

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Theorem fourierdlem31 46184

Description: If 𝐴 is finite and for any element in 𝐴 there is a number 𝑚 such that a property holds for all numbers larger than 𝑚, then there is a number 𝑛 such that the property holds for all numbers larger than 𝑛 and for all elements in 𝐴. (Contributed by Glauco Siliprandi, 11-Dec-2019.) (Revised by AV, 29-Sep-2020.)

**Hypotheses**
Ref	Expression
fourierdlem31.i	⊢ Ⅎ𝑖𝜑
fourierdlem31.r	⊢ Ⅎ𝑟𝜑
fourierdlem31.iv	⊢ Ⅎ𝑖𝑉
fourierdlem31.a	⊢ (𝜑 → 𝐴 ∈ Fin)
fourierdlem31.exm	⊢ (𝜑 → ∀𝑖 ∈ 𝐴 ∃𝑚 ∈ ℕ ∀𝑟 ∈ (𝑚(,)+∞)𝜒)
fourierdlem31.m	⊢ 𝑀 = {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}
fourierdlem31.v	⊢ 𝑉 = (𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < ))
fourierdlem31.n	⊢ 𝑁 = sup(ran 𝑉, ℝ, < )

**Assertion**
Ref	Expression
fourierdlem31	⊢ (𝜑 → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)

Distinct variable groups: 𝐴,𝑖,𝑚,𝑟 𝐴,𝑛,𝑖,𝑟 𝑛,𝑁 𝜒,𝑚 𝜒,𝑛 Allowed substitution hints: 𝜑(𝑖,𝑚,𝑛,𝑟) 𝜒(𝑖,𝑟) 𝑀(𝑖,𝑚,𝑛,𝑟) 𝑁(𝑖,𝑚,𝑟) 𝑉(𝑖,𝑚,𝑛,𝑟)

Proof of Theorem fourierdlem31 Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		1nn 12136	. . . 4 ⊢ 1 ∈ ℕ
2		rzal 4456	. . . . 5 ⊢ (𝐴 = ∅ → ∀𝑖 ∈ 𝐴 𝜒)
3	2	ralrimivw 3128	. . . 4 ⊢ (𝐴 = ∅ → ∀𝑟 ∈ (1(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
4		oveq1 7353	. . . . . 6 ⊢ (𝑛 = 1 → (𝑛(,)+∞) = (1(,)+∞))
5	4	raleqdv 3292	. . . . 5 ⊢ (𝑛 = 1 → (∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒 ↔ ∀𝑟 ∈ (1(,)+∞)∀𝑖 ∈ 𝐴 𝜒))
6	5	rspcev 3572	. . . 4 ⊢ ((1 ∈ ℕ ∧ ∀𝑟 ∈ (1(,)+∞)∀𝑖 ∈ 𝐴 𝜒) → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
7	1, 3, 6	sylancr 587	. . 3 ⊢ (𝐴 = ∅ → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
8	7	adantl 481	. 2 ⊢ ((𝜑 ∧ 𝐴 = ∅) → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
9		fourierdlem31.n	. . . 4 ⊢ 𝑁 = sup(ran 𝑉, ℝ, < )
10		fourierdlem31.i	. . . . . . 7 ⊢ Ⅎ𝑖𝜑
11		fourierdlem31.v	. . . . . . 7 ⊢ 𝑉 = (𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < ))
12		fourierdlem31.m	. . . . . . . . . 10 ⊢ 𝑀 = {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}
13	12	a1i 11	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → 𝑀 = {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒})
14	13	infeq1d 9362	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf(𝑀, ℝ, < ) = inf({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}, ℝ, < ))
15		ssrab2 4027	. . . . . . . . 9 ⊢ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ⊆ ℕ
16		nnuz 12775	. . . . . . . . . . 11 ⊢ ℕ = (ℤ_≥‘1)
17	15, 16	sseqtri 3978	. . . . . . . . . 10 ⊢ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ⊆ (ℤ_≥‘1)
18		fourierdlem31.exm	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑖 ∈ 𝐴 ∃𝑚 ∈ ℕ ∀𝑟 ∈ (𝑚(,)+∞)𝜒)
19	18	r19.21bi 3224	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ∃𝑚 ∈ ℕ ∀𝑟 ∈ (𝑚(,)+∞)𝜒)
20		rabn0 4336	. . . . . . . . . . 11 ⊢ ({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ≠ ∅ ↔ ∃𝑚 ∈ ℕ ∀𝑟 ∈ (𝑚(,)+∞)𝜒)
21	19, 20	sylibr 234	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ≠ ∅)
22		infssuzcl 12830	. . . . . . . . . 10 ⊢ (({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ⊆ (ℤ_≥‘1) ∧ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ≠ ∅) → inf({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}, ℝ, < ) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒})
23	17, 21, 22	sylancr 587	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}, ℝ, < ) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒})
24	15, 23	sselid 3927	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf({𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}, ℝ, < ) ∈ ℕ)
25	14, 24	eqeltrd 2831	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf(𝑀, ℝ, < ) ∈ ℕ)
26	10, 11, 25	rnmptssd 45241	. . . . . 6 ⊢ (𝜑 → ran 𝑉 ⊆ ℕ)
27	26	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ran 𝑉 ⊆ ℕ)
28		ltso 11193	. . . . . . 7 ⊢ < Or ℝ
29	28	a1i 11	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → < Or ℝ)
30		fourierdlem31.a	. . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ∈ Fin)
31		mptfi 9235	. . . . . . . . . 10 ⊢ (𝐴 ∈ Fin → (𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < )) ∈ Fin)
32	30, 31	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < )) ∈ Fin)
33	11, 32	eqeltrid 2835	. . . . . . . 8 ⊢ (𝜑 → 𝑉 ∈ Fin)
34		rnfi 9224	. . . . . . . 8 ⊢ (𝑉 ∈ Fin → ran 𝑉 ∈ Fin)
35	33, 34	syl 17	. . . . . . 7 ⊢ (𝜑 → ran 𝑉 ∈ Fin)
36	35	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ran 𝑉 ∈ Fin)
37		neqne 2936	. . . . . . . . 9 ⊢ (¬ 𝐴 = ∅ → 𝐴 ≠ ∅)
38		n0 4300	. . . . . . . . 9 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑖 𝑖 ∈ 𝐴)
39	37, 38	sylib 218	. . . . . . . 8 ⊢ (¬ 𝐴 = ∅ → ∃𝑖 𝑖 ∈ 𝐴)
40	39	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ∃𝑖 𝑖 ∈ 𝐴)
41		nfv 1915	. . . . . . . . 9 ⊢ Ⅎ𝑖 ¬ 𝐴 = ∅
42	10, 41	nfan 1900	. . . . . . . 8 ⊢ Ⅎ𝑖(𝜑 ∧ ¬ 𝐴 = ∅)
43		fourierdlem31.iv	. . . . . . . . . 10 ⊢ Ⅎ𝑖𝑉
44	43	nfrn 5891	. . . . . . . . 9 ⊢ Ⅎ𝑖ran 𝑉
45		nfcv 2894	. . . . . . . . 9 ⊢ Ⅎ𝑖∅
46	44, 45	nfne 3029	. . . . . . . 8 ⊢ Ⅎ𝑖ran 𝑉 ≠ ∅
47		simpr 484	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → 𝑖 ∈ 𝐴)
48	11	elrnmpt1 5899	. . . . . . . . . . . 12 ⊢ ((𝑖 ∈ 𝐴 ∧ inf(𝑀, ℝ, < ) ∈ ℕ) → inf(𝑀, ℝ, < ) ∈ ran 𝑉)
49	47, 25, 48	syl2anc 584	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf(𝑀, ℝ, < ) ∈ ran 𝑉)
50	49	ne0d 4289	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ran 𝑉 ≠ ∅)
51	50	ex 412	. . . . . . . . 9 ⊢ (𝜑 → (𝑖 ∈ 𝐴 → ran 𝑉 ≠ ∅))
52	51	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → (𝑖 ∈ 𝐴 → ran 𝑉 ≠ ∅))
53	42, 46, 52	exlimd 2221	. . . . . . 7 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → (∃𝑖 𝑖 ∈ 𝐴 → ran 𝑉 ≠ ∅))
54	40, 53	mpd 15	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ran 𝑉 ≠ ∅)
55		nnssre 12129	. . . . . . 7 ⊢ ℕ ⊆ ℝ
56	27, 55	sstrdi 3942	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ran 𝑉 ⊆ ℝ)
57		fisupcl 9354	. . . . . 6 ⊢ (( < Or ℝ ∧ (ran 𝑉 ∈ Fin ∧ ran 𝑉 ≠ ∅ ∧ ran 𝑉 ⊆ ℝ)) → sup(ran 𝑉, ℝ, < ) ∈ ran 𝑉)
58	29, 36, 54, 56, 57	syl13anc 1374	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → sup(ran 𝑉, ℝ, < ) ∈ ran 𝑉)
59	27, 58	sseldd 3930	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → sup(ran 𝑉, ℝ, < ) ∈ ℕ)
60	9, 59	eqeltrid 2835	. . 3 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → 𝑁 ∈ ℕ)
61		fourierdlem31.r	. . . . 5 ⊢ Ⅎ𝑟𝜑
62		nfcv 2894	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖ℝ
63		nfcv 2894	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖 <
64	44, 62, 63	nfsup 9335	. . . . . . . . . . 11 ⊢ Ⅎ𝑖sup(ran 𝑉, ℝ, < )
65	9, 64	nfcxfr 2892	. . . . . . . . . 10 ⊢ Ⅎ𝑖𝑁
66		nfcv 2894	. . . . . . . . . 10 ⊢ Ⅎ𝑖(,)
67		nfcv 2894	. . . . . . . . . 10 ⊢ Ⅎ𝑖+∞
68	65, 66, 67	nfov 7376	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝑁(,)+∞)
69	68	nfcri 2886	. . . . . . . 8 ⊢ Ⅎ𝑖 𝑟 ∈ (𝑁(,)+∞)
70	10, 69	nfan 1900	. . . . . . 7 ⊢ Ⅎ𝑖(𝜑 ∧ 𝑟 ∈ (𝑁(,)+∞))
71	11	fvmpt2 6940	. . . . . . . . . . . . . 14 ⊢ ((𝑖 ∈ 𝐴 ∧ inf(𝑀, ℝ, < ) ∈ ℕ) → (𝑉‘𝑖) = inf(𝑀, ℝ, < ))
72	47, 25, 71	syl2anc 584	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) = inf(𝑀, ℝ, < ))
73	25	nnxrd 45323	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf(𝑀, ℝ, < ) ∈ ℝ^*)
74	72, 73	eqeltrd 2831	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ∈ ℝ^*)
75	74	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → (𝑉‘𝑖) ∈ ℝ^*)
76		pnfxr 11166	. . . . . . . . . . . 12 ⊢ +∞ ∈ ℝ^*
77	76	a1i 11	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → +∞ ∈ ℝ^*)
78		elioore 13275	. . . . . . . . . . . 12 ⊢ (𝑟 ∈ (𝑁(,)+∞) → 𝑟 ∈ ℝ)
79	78	adantl 481	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑟 ∈ ℝ)
80	72, 25	eqeltrd 2831	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ∈ ℕ)
81	80	nnred 12140	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ∈ ℝ)
82	81	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → (𝑉‘𝑖) ∈ ℝ)
83		ne0i 4288	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 ∈ 𝐴 → 𝐴 ≠ ∅)
84	83	adantl 481	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → 𝐴 ≠ ∅)
85	84	neneqd 2933	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ¬ 𝐴 = ∅)
86	85, 60	syldan 591	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → 𝑁 ∈ ℕ)
87	86	nnred 12140	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → 𝑁 ∈ ℝ)
88	87	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑁 ∈ ℝ)
89	85, 56	syldan 591	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ran 𝑉 ⊆ ℝ)
90	26, 55	sstrdi 3942	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ran 𝑉 ⊆ ℝ)
91		fimaxre2 12067	. . . . . . . . . . . . . . . . 17 ⊢ ((ran 𝑉 ⊆ ℝ ∧ ran 𝑉 ∈ Fin) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran 𝑉 𝑦 ≤ 𝑥)
92	90, 35, 91	syl2anc 584	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran 𝑉 𝑦 ≤ 𝑥)
93	92	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran 𝑉 𝑦 ≤ 𝑥)
94	72, 49	eqeltrd 2831	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ∈ ran 𝑉)
95		suprub 12083	. . . . . . . . . . . . . . 15 ⊢ (((ran 𝑉 ⊆ ℝ ∧ ran 𝑉 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran 𝑉 𝑦 ≤ 𝑥) ∧ (𝑉‘𝑖) ∈ ran 𝑉) → (𝑉‘𝑖) ≤ sup(ran 𝑉, ℝ, < ))
96	89, 50, 93, 94, 95	syl31anc 1375	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ≤ sup(ran 𝑉, ℝ, < ))
97	96, 9	breqtrrdi 5131	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ≤ 𝑁)
98	97	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → (𝑉‘𝑖) ≤ 𝑁)
99	88	rexrd 11162	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑁 ∈ ℝ^*)
100		simpr 484	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑟 ∈ (𝑁(,)+∞))
101		ioogtlb 45543	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℝ^* ∧ +∞ ∈ ℝ^* ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑁 < 𝑟)
102	99, 77, 100, 101	syl3anc 1373	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑁 < 𝑟)
103	82, 88, 79, 98, 102	lelttrd 11271	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → (𝑉‘𝑖) < 𝑟)
104	79	ltpnfd 13020	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑟 < +∞)
105	75, 77, 79, 103, 104	eliood 45546	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝑟 ∈ ((𝑉‘𝑖)(,)+∞))
106	14, 23	eqeltrd 2831	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → inf(𝑀, ℝ, < ) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒})
107	72, 106	eqeltrd 2831	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → (𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒})
108		nfcv 2894	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑚𝐴
109		nfrab1 3415	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑚{𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}
110	12, 109	nfcxfr 2892	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑚𝑀
111		nfcv 2894	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑚ℝ
112		nfcv 2894	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑚 <
113	110, 111, 112	nfinf 9367	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑚inf(𝑀, ℝ, < )
114	108, 113	nfmpt 5187	. . . . . . . . . . . . . . . . 17 ⊢ Ⅎ𝑚(𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < ))
115	11, 114	nfcxfr 2892	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑚𝑉
116		nfcv 2894	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑚𝑖
117	115, 116	nffv 6832	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑚(𝑉‘𝑖)
118	117, 109	nfel 2909	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑚(𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}
119	117	nfel1 2911	. . . . . . . . . . . . . . . . 17 ⊢ Ⅎ𝑚(𝑉‘𝑖) ∈ ℕ
120		nfcv 2894	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑚(,)
121		nfcv 2894	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑚+∞
122	117, 120, 121	nfov 7376	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑚((𝑉‘𝑖)(,)+∞)
123		nfv 1915	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑚𝜒
124	122, 123	nfralw 3279	. . . . . . . . . . . . . . . . 17 ⊢ Ⅎ𝑚∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒
125	119, 124	nfan 1900	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑚((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒)
126	118, 125	nfbi 1904	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑚((𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒))
127		eleq1 2819	. . . . . . . . . . . . . . . 16 ⊢ (𝑚 = (𝑉‘𝑖) → (𝑚 ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ (𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}))
128		eleq1 2819	. . . . . . . . . . . . . . . . 17 ⊢ (𝑚 = (𝑉‘𝑖) → (𝑚 ∈ ℕ ↔ (𝑉‘𝑖) ∈ ℕ))
129		oveq1 7353	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑚 = (𝑉‘𝑖) → (𝑚(,)+∞) = ((𝑉‘𝑖)(,)+∞))
130		nfcv 2894	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑟(𝑚(,)+∞)
131		nfcv 2894	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ Ⅎ𝑟𝐴
132		nfra1 3256	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ Ⅎ𝑟∀𝑟 ∈ (𝑚(,)+∞)𝜒
133		nfcv 2894	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ Ⅎ𝑟ℕ
134	132, 133	nfrabw 3432	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ Ⅎ𝑟{𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒}
135	12, 134	nfcxfr 2892	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ Ⅎ𝑟𝑀
136		nfcv 2894	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ Ⅎ𝑟ℝ
137		nfcv 2894	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ Ⅎ𝑟 <
138	135, 136, 137	nfinf 9367	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ Ⅎ𝑟inf(𝑀, ℝ, < )
139	131, 138	nfmpt 5187	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ Ⅎ𝑟(𝑖 ∈ 𝐴 ↦ inf(𝑀, ℝ, < ))
140	11, 139	nfcxfr 2892	. . . . . . . . . . . . . . . . . . . . 21 ⊢ Ⅎ𝑟𝑉
141		nfcv 2894	. . . . . . . . . . . . . . . . . . . . 21 ⊢ Ⅎ𝑟𝑖
142	140, 141	nffv 6832	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑟(𝑉‘𝑖)
143		nfcv 2894	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑟(,)
144		nfcv 2894	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑟+∞
145	142, 143, 144	nfov 7376	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑟((𝑉‘𝑖)(,)+∞)
146	130, 145	raleqf 3321	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑚(,)+∞) = ((𝑉‘𝑖)(,)+∞) → (∀𝑟 ∈ (𝑚(,)+∞)𝜒 ↔ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒))
147	129, 146	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (𝑚 = (𝑉‘𝑖) → (∀𝑟 ∈ (𝑚(,)+∞)𝜒 ↔ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒))
148	128, 147	anbi12d 632	. . . . . . . . . . . . . . . 16 ⊢ (𝑚 = (𝑉‘𝑖) → ((𝑚 ∈ ℕ ∧ ∀𝑟 ∈ (𝑚(,)+∞)𝜒) ↔ ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒)))
149	127, 148	bibi12d 345	. . . . . . . . . . . . . . 15 ⊢ (𝑚 = (𝑉‘𝑖) → ((𝑚 ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ (𝑚 ∈ ℕ ∧ ∀𝑟 ∈ (𝑚(,)+∞)𝜒)) ↔ ((𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒))))
150		rabid 3416	. . . . . . . . . . . . . . 15 ⊢ (𝑚 ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ (𝑚 ∈ ℕ ∧ ∀𝑟 ∈ (𝑚(,)+∞)𝜒))
151	117, 126, 149, 150	vtoclgf 3521	. . . . . . . . . . . . . 14 ⊢ ((𝑉‘𝑖) ∈ ℕ → ((𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒)))
152	80, 151	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ((𝑉‘𝑖) ∈ {𝑚 ∈ ℕ ∣ ∀𝑟 ∈ (𝑚(,)+∞)𝜒} ↔ ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒)))
153	107, 152	mpbid 232	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ((𝑉‘𝑖) ∈ ℕ ∧ ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒))
154	153	simprd 495	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐴) → ∀𝑟 ∈ ((𝑉‘𝑖)(,)+∞)𝜒)
155	154	r19.21bi 3224	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ ((𝑉‘𝑖)(,)+∞)) → 𝜒)
156	105, 155	syldan 591	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐴) ∧ 𝑟 ∈ (𝑁(,)+∞)) → 𝜒)
157	156	an32s 652	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑟 ∈ (𝑁(,)+∞)) ∧ 𝑖 ∈ 𝐴) → 𝜒)
158	157	ex 412	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (𝑁(,)+∞)) → (𝑖 ∈ 𝐴 → 𝜒))
159	70, 158	ralrimi 3230	. . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (𝑁(,)+∞)) → ∀𝑖 ∈ 𝐴 𝜒)
160	159	ex 412	. . . . 5 ⊢ (𝜑 → (𝑟 ∈ (𝑁(,)+∞) → ∀𝑖 ∈ 𝐴 𝜒))
161	61, 160	ralrimi 3230	. . . 4 ⊢ (𝜑 → ∀𝑟 ∈ (𝑁(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
162	161	adantr 480	. . 3 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ∀𝑟 ∈ (𝑁(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
163		oveq1 7353	. . . . 5 ⊢ (𝑛 = 𝑁 → (𝑛(,)+∞) = (𝑁(,)+∞))
164		nfcv 2894	. . . . . 6 ⊢ Ⅎ𝑟(𝑛(,)+∞)
165	140	nfrn 5891	. . . . . . . . 9 ⊢ Ⅎ𝑟ran 𝑉
166	165, 136, 137	nfsup 9335	. . . . . . . 8 ⊢ Ⅎ𝑟sup(ran 𝑉, ℝ, < )
167	9, 166	nfcxfr 2892	. . . . . . 7 ⊢ Ⅎ𝑟𝑁
168	167, 143, 144	nfov 7376	. . . . . 6 ⊢ Ⅎ𝑟(𝑁(,)+∞)
169	164, 168	raleqf 3321	. . . . 5 ⊢ ((𝑛(,)+∞) = (𝑁(,)+∞) → (∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒 ↔ ∀𝑟 ∈ (𝑁(,)+∞)∀𝑖 ∈ 𝐴 𝜒))
170	163, 169	syl 17	. . . 4 ⊢ (𝑛 = 𝑁 → (∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒 ↔ ∀𝑟 ∈ (𝑁(,)+∞)∀𝑖 ∈ 𝐴 𝜒))
171	170	rspcev 3572	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ ∀𝑟 ∈ (𝑁(,)+∞)∀𝑖 ∈ 𝐴 𝜒) → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
172	60, 162, 171	syl2anc 584	. 2 ⊢ ((𝜑 ∧ ¬ 𝐴 = ∅) → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)
173	8, 172	pm2.61dan 812	1 ⊢ (𝜑 → ∃𝑛 ∈ ℕ ∀𝑟 ∈ (𝑛(,)+∞)∀𝑖 ∈ 𝐴 𝜒)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∃wex 1780 Ⅎwnf 1784 ∈ wcel 2111 Ⅎwnfc 2879 ≠ wne 2928 ∀wral 3047 ∃wrex 3056 {crab 3395 ⊆ wss 3897 ∅c0 4280 class class class wbr 5089 ↦ cmpt 5170 Or wor 5521 ran crn 5615 ‘cfv 6481 (class class class)co 7346 Fincfn 8869 supcsup 9324 infcinf 9325 ℝcr 11005 1c1 11007 +∞cpnf 11143 ℝ^*cxr 11145 < clt 11146 ≤ cle 11147 ℕcn 12125 ℤ_≥cuz 12732 (,)cioo 13245

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 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083 ax-pre-sup 11084

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-sup 9326 df-inf 9327 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-nn 12126 df-n0 12382 df-z 12469 df-uz 12733 df-ioo 13249

This theorem is referenced by: fourierdlem73 46225

W3C validator