iunhoiioolem - Mathbox for Glauco Siliprandi

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Theorem iunhoiioolem 42964

Description: A n-dimensional open interval expressed as the indexed union of half-open intervals. One side of the double inclusion. (Contributed by Glauco Siliprandi, 8-Apr-2021.)

**Hypotheses**
Ref	Expression
iunhoiioolem.K	⊢ Ⅎ𝑘𝜑
iunhoiioolem.x	⊢ (𝜑 → 𝑋 ∈ Fin)
iunhoiioolem.n	⊢ (𝜑 → 𝑋 ≠ ∅)
iunhoiioolem.a	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ)
iunhoiioolem.b	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ^*)
iunhoiioolem.f	⊢ (𝜑 → 𝐹 ∈ X𝑘 ∈ 𝑋 (𝐴(,)𝐵))
iunhoiioolem.c	⊢ 𝐶 = inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < )

**Assertion**
Ref	Expression
iunhoiioolem	⊢ (𝜑 → 𝐹 ∈ ∪ 𝑛 ∈ ℕ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵))

Distinct variable groups: 𝐶,𝑛 𝑘,𝐹,𝑛 𝑘,𝑋 𝜑,𝑛 Allowed substitution hints: 𝜑(𝑘) 𝐴(𝑘,𝑛) 𝐵(𝑘,𝑛) 𝐶(𝑘) 𝑋(𝑛)

**Proof of Theorem iunhoiioolem**
Step	Hyp	Ref	Expression
1		iunhoiioolem.K	. . . . . 6 ⊢ Ⅎ𝑘𝜑
2		eqid 2823	. . . . . 6 ⊢ (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) = (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴))
3		iunhoiioolem.f	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 ∈ X𝑘 ∈ 𝑋 (𝐴(,)𝐵))
4		ixpf 8486	. . . . . . . . . . 11 ⊢ (𝐹 ∈ X𝑘 ∈ 𝑋 (𝐴(,)𝐵) → 𝐹:𝑋⟶∪ 𝑘 ∈ 𝑋 (𝐴(,)𝐵))
5	3, 4	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹:𝑋⟶∪ 𝑘 ∈ 𝑋 (𝐴(,)𝐵))
6		ioossre 12801	. . . . . . . . . . . . 13 ⊢ (𝐴(,)𝐵) ⊆ ℝ
7	6	rgenw 3152	. . . . . . . . . . . 12 ⊢ ∀𝑘 ∈ 𝑋 (𝐴(,)𝐵) ⊆ ℝ
8	7	a1i 11	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑘 ∈ 𝑋 (𝐴(,)𝐵) ⊆ ℝ)
9		iunss 4971	. . . . . . . . . . 11 ⊢ (∪ 𝑘 ∈ 𝑋 (𝐴(,)𝐵) ⊆ ℝ ↔ ∀𝑘 ∈ 𝑋 (𝐴(,)𝐵) ⊆ ℝ)
10	8, 9	sylibr 236	. . . . . . . . . 10 ⊢ (𝜑 → ∪ 𝑘 ∈ 𝑋 (𝐴(,)𝐵) ⊆ ℝ)
11	5, 10	fssd 6530	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:𝑋⟶ℝ)
12	11	ffvelrnda 6853	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ ℝ)
13		iunhoiioolem.a	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ)
14	12, 13	resubcld 11070	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((𝐹‘𝑘) − 𝐴) ∈ ℝ)
15	13	rexrd 10693	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ^*)
16		iunhoiioolem.b	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ^*)
17	3	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐹 ∈ X𝑘 ∈ 𝑋 (𝐴(,)𝐵))
18		simpr 487	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑘 ∈ 𝑋)
19		fvixp2 41468	. . . . . . . . . 10 ⊢ ((𝐹 ∈ X𝑘 ∈ 𝑋 (𝐴(,)𝐵) ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ (𝐴(,)𝐵))
20	17, 18, 19	syl2anc 586	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ (𝐴(,)𝐵))
21		ioogtlb 41777	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐹‘𝑘) ∈ (𝐴(,)𝐵)) → 𝐴 < (𝐹‘𝑘))
22	15, 16, 20, 21	syl3anc 1367	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝐴 < (𝐹‘𝑘))
23	13, 12	posdifd 11229	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴 < (𝐹‘𝑘) ↔ 0 < ((𝐹‘𝑘) − 𝐴)))
24	22, 23	mpbid 234	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 0 < ((𝐹‘𝑘) − 𝐴))
25	14, 24	elrpd 12431	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → ((𝐹‘𝑘) − 𝐴) ∈ ℝ⁺)
26	1, 2, 25	rnmptssd 41465	. . . . 5 ⊢ (𝜑 → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ⊆ ℝ⁺)
27		iunhoiioolem.c	. . . . . 6 ⊢ 𝐶 = inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < )
28		ltso 10723	. . . . . . . 8 ⊢ < Or ℝ
29	28	a1i 11	. . . . . . 7 ⊢ (𝜑 → < Or ℝ)
30		iunhoiioolem.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Fin)
31	2	rnmptfi 41434	. . . . . . . 8 ⊢ (𝑋 ∈ Fin → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ∈ Fin)
32	30, 31	syl 17	. . . . . . 7 ⊢ (𝜑 → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ∈ Fin)
33		iunhoiioolem.n	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ≠ ∅)
34	1, 25, 2, 33	rnmptn0 41491	. . . . . . 7 ⊢ (𝜑 → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ≠ ∅)
35	1, 2, 14	rnmptssd 41465	. . . . . . 7 ⊢ (𝜑 → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ⊆ ℝ)
36		fiinfcl 8967	. . . . . . 7 ⊢ (( < Or ℝ ∧ (ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ∈ Fin ∧ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ≠ ∅ ∧ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ⊆ ℝ)) → inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < ) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
37	29, 32, 34, 35, 36	syl13anc 1368	. . . . . 6 ⊢ (𝜑 → inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < ) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
38	27, 37	eqeltrid 2919	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
39	26, 38	sseldd 3970	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ⁺)
40		rpgtrecnn 41656	. . . 4 ⊢ (𝐶 ∈ ℝ⁺ → ∃𝑛 ∈ ℕ (1 / 𝑛) < 𝐶)
41	39, 40	syl 17	. . 3 ⊢ (𝜑 → ∃𝑛 ∈ ℕ (1 / 𝑛) < 𝐶)
42	3	elexd 3516	. . . . . . . 8 ⊢ (𝜑 → 𝐹 ∈ V)
43	42	ad2antrr 724	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → 𝐹 ∈ V)
44	5	ffnd 6517	. . . . . . . 8 ⊢ (𝜑 → 𝐹 Fn 𝑋)
45	44	ad2antrr 724	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → 𝐹 Fn 𝑋)
46		nfv 1915	. . . . . . . . . 10 ⊢ Ⅎ𝑘 𝑛 ∈ ℕ
47	1, 46	nfan 1900	. . . . . . . . 9 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑛 ∈ ℕ)
48		nfcv 2979	. . . . . . . . . 10 ⊢ Ⅎ𝑘(1 / 𝑛)
49		nfcv 2979	. . . . . . . . . 10 ⊢ Ⅎ𝑘 <
50		nfmpt1 5166	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑘(𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴))
51	50	nfrn 5826	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴))
52		nfcv 2979	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘ℝ
53	51, 52, 49	nfinf 8948	. . . . . . . . . . 11 ⊢ Ⅎ𝑘inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < )
54	27, 53	nfcxfr 2977	. . . . . . . . . 10 ⊢ Ⅎ𝑘𝐶
55	48, 49, 54	nfbr 5115	. . . . . . . . 9 ⊢ Ⅎ𝑘(1 / 𝑛) < 𝐶
56	47, 55	nfan 1900	. . . . . . . 8 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶)
57	13	adantlr 713	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ)
58		nnrecre 11682	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → (1 / 𝑛) ∈ ℝ)
59	58	ad2antlr 725	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → (1 / 𝑛) ∈ ℝ)
60	57, 59	readdcld 10672	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) ∈ ℝ)
61	60	rexrd 10693	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) ∈ ℝ^*)
62	61	adantlr 713	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) ∈ ℝ^*)
63	16	adantlr 713	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ^*)
64	63	adantlr 713	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → 𝐵 ∈ ℝ^*)
65		ressxr 10687	. . . . . . . . . . . . . 14 ⊢ ℝ ⊆ ℝ^*
66	65	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℝ ⊆ ℝ^*)
67	11, 66	fssd 6530	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹:𝑋⟶ℝ^*)
68	67	ad2antrr 724	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → 𝐹:𝑋⟶ℝ^*)
69	68	ffvelrnda 6853	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ ℝ^*)
70	60	adantlr 713	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) ∈ ℝ)
71	12	ad4ant14 750	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ ℝ)
72	59	adantlr 713	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (1 / 𝑛) ∈ ℝ)
73	35, 38	sseldd 3970	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐶 ∈ ℝ)
74	73	ad3antrrr 728	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → 𝐶 ∈ ℝ)
75	14	ad4ant14 750	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → ((𝐹‘𝑘) − 𝐴) ∈ ℝ)
76		simplr 767	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (1 / 𝑛) < 𝐶)
77	35	ad2antrr 724	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ⊆ ℝ)
78	32	ad2antrr 724	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ∈ Fin)
79		id 22	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ 𝑋 → 𝑘 ∈ 𝑋)
80		ovexd 7193	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ 𝑋 → ((𝐹‘𝑘) − 𝐴) ∈ V)
81	2	elrnmpt1 5832	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑘 ∈ 𝑋 ∧ ((𝐹‘𝑘) − 𝐴) ∈ V) → ((𝐹‘𝑘) − 𝐴) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
82	79, 80, 81	syl2anc 586	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ 𝑋 → ((𝐹‘𝑘) − 𝐴) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
83	82	adantl 484	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → ((𝐹‘𝑘) − 𝐴) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)))
84		infrefilb 41658	. . . . . . . . . . . . . . . 16 ⊢ ((ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ⊆ ℝ ∧ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)) ∈ Fin ∧ ((𝐹‘𝑘) − 𝐴) ∈ ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴))) → inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < ) ≤ ((𝐹‘𝑘) − 𝐴))
85	77, 78, 83, 84	syl3anc 1367	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → inf(ran (𝑘 ∈ 𝑋 ↦ ((𝐹‘𝑘) − 𝐴)), ℝ, < ) ≤ ((𝐹‘𝑘) − 𝐴))
86	27, 85	eqbrtrid 5103	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ 𝑋) → 𝐶 ≤ ((𝐹‘𝑘) − 𝐴))
87	86	adantlr 713	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → 𝐶 ≤ ((𝐹‘𝑘) − 𝐴))
88	72, 74, 75, 76, 87	ltletrd 10802	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (1 / 𝑛) < ((𝐹‘𝑘) − 𝐴))
89	57	adantlr 713	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → 𝐴 ∈ ℝ)
90	89, 72, 71	ltaddsub2d 11243	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → ((𝐴 + (1 / 𝑛)) < (𝐹‘𝑘) ↔ (1 / 𝑛) < ((𝐹‘𝑘) − 𝐴)))
91	88, 90	mpbird 259	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) < (𝐹‘𝑘))
92	70, 71, 91	ltled 10790	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐴 + (1 / 𝑛)) ≤ (𝐹‘𝑘))
93		iooltub 41793	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ (𝐹‘𝑘) ∈ (𝐴(,)𝐵)) → (𝐹‘𝑘) < 𝐵)
94	15, 16, 20, 93	syl3anc 1367	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) < 𝐵)
95	94	ad4ant14 750	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) < 𝐵)
96	62, 64, 69, 92, 95	elicod 12790	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) ∧ 𝑘 ∈ 𝑋) → (𝐹‘𝑘) ∈ ((𝐴 + (1 / 𝑛))[,)𝐵))
97	96	ex 415	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → (𝑘 ∈ 𝑋 → (𝐹‘𝑘) ∈ ((𝐴 + (1 / 𝑛))[,)𝐵)))
98	56, 97	ralrimi 3218	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → ∀𝑘 ∈ 𝑋 (𝐹‘𝑘) ∈ ((𝐴 + (1 / 𝑛))[,)𝐵))
99	43, 45, 98	3jca 1124	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → (𝐹 ∈ V ∧ 𝐹 Fn 𝑋 ∧ ∀𝑘 ∈ 𝑋 (𝐹‘𝑘) ∈ ((𝐴 + (1 / 𝑛))[,)𝐵)))
100		elixp2 8467	. . . . . 6 ⊢ (𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵) ↔ (𝐹 ∈ V ∧ 𝐹 Fn 𝑋 ∧ ∀𝑘 ∈ 𝑋 (𝐹‘𝑘) ∈ ((𝐴 + (1 / 𝑛))[,)𝐵)))
101	99, 100	sylibr 236	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (1 / 𝑛) < 𝐶) → 𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵))
102	101	ex 415	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((1 / 𝑛) < 𝐶 → 𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵)))
103	102	reximdva 3276	. . 3 ⊢ (𝜑 → (∃𝑛 ∈ ℕ (1 / 𝑛) < 𝐶 → ∃𝑛 ∈ ℕ 𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵)))
104	41, 103	mpd 15	. 2 ⊢ (𝜑 → ∃𝑛 ∈ ℕ 𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵))
105		eliun 4925	. 2 ⊢ (𝐹 ∈ ∪ 𝑛 ∈ ℕ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵) ↔ ∃𝑛 ∈ ℕ 𝐹 ∈ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵))
106	104, 105	sylibr 236	1 ⊢ (𝜑 → 𝐹 ∈ ∪ 𝑛 ∈ ℕ X𝑘 ∈ 𝑋 ((𝐴 + (1 / 𝑛))[,)𝐵))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 ∧ w3a 1083 = wceq 1537 Ⅎwnf 1784 ∈ wcel 2114 ≠ wne 3018 ∀wral 3140 ∃wrex 3141 Vcvv 3496 ⊆ wss 3938 ∅c0 4293 ∪ ciun 4921 class class class wbr 5068 ↦ cmpt 5148 Or wor 5475 ran crn 5558 Fn wfn 6352 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 Xcixp 8463 Fincfn 8511 infcinf 8907 ℝcr 10538 0cc0 10539 1c1 10540 + caddc 10542 ℝ^*cxr 10676 < clt 10677 ≤ cle 10678 − cmin 10872 / cdiv 11299 ℕcn 11640 ℝ⁺crp 12392 (,)cioo 12741 [,)cico 12743

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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-oadd 8108 df-er 8291 df-ixp 8464 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-sup 8908 df-inf 8909 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-n0 11901 df-z 11985 df-uz 12247 df-rp 12393 df-ioo 12745 df-ico 12747 df-fl 13165

This theorem is referenced by: iunhoiioo 42965

W3C validator