Theorem sepfsepc 46109

Description: If two sets are separated by a continuous function, then they are separated by closed neighborhoods. (Contributed by Zhi Wang, 9-Sep-2024.)

Hypothesis

Ref	Expression
sepfsepc.1	⊢ (𝜑 → ∃𝑓 ∈ (𝐽 Cn II)(𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1})))

Assertion

Ref	Expression
sepfsepc	⊢ (𝜑 → ∃𝑛 ∈ ((nei‘𝐽)‘𝑆)∃𝑚 ∈ ((nei‘𝐽)‘𝑇)(𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅))

Distinct variable groups:   𝑓,𝐽,𝑚,𝑛   𝑆,𝑓,𝑛   𝑇,𝑓,𝑚,𝑛

Allowed substitution hints:   𝜑(𝑓,𝑚,𝑛)   𝑆(𝑚)

Proof of Theorem sepfsepc

Step	Hyp	Ref	Expression
1		sepfsepc.1	. 2 ⊢ (𝜑 → ∃𝑓 ∈ (𝐽 Cn II)(𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1})))
2		simpl 482	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑓 ∈ (𝐽 Cn II))
3		0re 10908	. . . . . . . 8 ⊢ 0 ∈ ℝ
4		1re 10906	. . . . . . . 8 ⊢ 1 ∈ ℝ
5		0le0 12004	. . . . . . . 8 ⊢ 0 ≤ 0
6		3re 11983	. . . . . . . . . 10 ⊢ 3 ∈ ℝ
7		3ne0 12009	. . . . . . . . . 10 ⊢ 3 ≠ 0
8	6, 7	rereccli 11670	. . . . . . . . 9 ⊢ (1 / 3) ∈ ℝ
9		1lt3 12076	. . . . . . . . . . 11 ⊢ 1 < 3
10		recgt1i 11802	. . . . . . . . . . 11 ⊢ ((3 ∈ ℝ ∧ 1 < 3) → (0 < (1 / 3) ∧ (1 / 3) < 1))
11	6, 9, 10	mp2an 688	. . . . . . . . . 10 ⊢ (0 < (1 / 3) ∧ (1 / 3) < 1)
12	11	simpri 485	. . . . . . . . 9 ⊢ (1 / 3) < 1
13	8, 4, 12	ltleii 11028	. . . . . . . 8 ⊢ (1 / 3) ≤ 1
14		iccss 13076	. . . . . . . 8 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ 0 ∧ (1 / 3) ≤ 1)) → (0[,](1 / 3)) ⊆ (0[,]1))
15	3, 4, 5, 13, 14	mp4an 689	. . . . . . 7 ⊢ (0[,](1 / 3)) ⊆ (0[,]1)
16		i0oii 46101	. . . . . . . . 9 ⊢ ((1 / 3) ≤ 1 → (0[,)(1 / 3)) ∈ II)
17	13, 16	ax-mp 5	. . . . . . . 8 ⊢ (0[,)(1 / 3)) ∈ II
18	11	simpli 483	. . . . . . . . . 10 ⊢ 0 < (1 / 3)
19	8	rexri 10964	. . . . . . . . . . . . 13 ⊢ (1 / 3) ∈ ℝ*
20		elico2 13072	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ ∧ (1 / 3) ∈ ℝ*) → (0 ∈ (0[,)(1 / 3)) ↔ (0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3))))
21	3, 19, 20	mp2an 688	. . . . . . . . . . . 12 ⊢ (0 ∈ (0[,)(1 / 3)) ↔ (0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)))
22	21	biimpri 227	. . . . . . . . . . 11 ⊢ ((0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)) → 0 ∈ (0[,)(1 / 3)))
23	22	snssd 4739	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)) → {0} ⊆ (0[,)(1 / 3)))
24	3, 5, 18, 23	mp3an 1459	. . . . . . . . 9 ⊢ {0} ⊆ (0[,)(1 / 3))
25		icossicc 13097	. . . . . . . . 9 ⊢ (0[,)(1 / 3)) ⊆ (0[,](1 / 3))
26	24, 25	pm3.2i 470	. . . . . . . 8 ⊢ ({0} ⊆ (0[,)(1 / 3)) ∧ (0[,)(1 / 3)) ⊆ (0[,](1 / 3)))
27		sseq2 3943	. . . . . . . . . 10 ⊢ (𝑔 = (0[,)(1 / 3)) → ({0} ⊆ 𝑔 ↔ {0} ⊆ (0[,)(1 / 3))))
28		sseq1 3942	. . . . . . . . . 10 ⊢ (𝑔 = (0[,)(1 / 3)) → (𝑔 ⊆ (0[,](1 / 3)) ↔ (0[,)(1 / 3)) ⊆ (0[,](1 / 3))))
29	27, 28	anbi12d 630	. . . . . . . . 9 ⊢ (𝑔 = (0[,)(1 / 3)) → (({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3))) ↔ ({0} ⊆ (0[,)(1 / 3)) ∧ (0[,)(1 / 3)) ⊆ (0[,](1 / 3)))))
30	29	rspcev 3552	. . . . . . . 8 ⊢ (((0[,)(1 / 3)) ∈ II ∧ ({0} ⊆ (0[,)(1 / 3)) ∧ (0[,)(1 / 3)) ⊆ (0[,](1 / 3)))) → ∃𝑔 ∈ II ({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3))))
31	17, 26, 30	mp2an 688	. . . . . . 7 ⊢ ∃𝑔 ∈ II ({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3)))
32		iitop 23949	. . . . . . . 8 ⊢ II ∈ Top
33	24, 25	sstri 3926	. . . . . . . . 9 ⊢ {0} ⊆ (0[,](1 / 3))
34	33, 15	sstri 3926	. . . . . . . 8 ⊢ {0} ⊆ (0[,]1)
35		iiuni 23950	. . . . . . . . 9 ⊢ (0[,]1) = ∪ II
36	35	isnei 22162	. . . . . . . 8 ⊢ ((II ∈ Top ∧ {0} ⊆ (0[,]1)) → ((0[,](1 / 3)) ∈ ((nei‘II)‘{0}) ↔ ((0[,](1 / 3)) ⊆ (0[,]1) ∧ ∃𝑔 ∈ II ({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3))))))
37	32, 34, 36	mp2an 688	. . . . . . 7 ⊢ ((0[,](1 / 3)) ∈ ((nei‘II)‘{0}) ↔ ((0[,](1 / 3)) ⊆ (0[,]1) ∧ ∃𝑔 ∈ II ({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3)))))
38	15, 31, 37	mpbir2an 707	. . . . . 6 ⊢ (0[,](1 / 3)) ∈ ((nei‘II)‘{0})
39	38	a1i 11	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (0[,](1 / 3)) ∈ ((nei‘II)‘{0}))
40		simprl 767	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑆 ⊆ (◡𝑓 “ {0}))
41	2, 39, 40	cnneiima 46098	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ∈ ((nei‘𝐽)‘𝑆))
42		halfge0 12120	. . . . . . . 8 ⊢ 0 ≤ (1 / 2)
43		1le1 11533	. . . . . . . 8 ⊢ 1 ≤ 1
44		iccss 13076	. . . . . . . 8 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ (1 / 2) ∧ 1 ≤ 1)) → ((1 / 2)[,]1) ⊆ (0[,]1))
45	3, 4, 42, 43, 44	mp4an 689	. . . . . . 7 ⊢ ((1 / 2)[,]1) ⊆ (0[,]1)
46		io1ii 46102	. . . . . . . . 9 ⊢ (0 ≤ (1 / 2) → ((1 / 2)(,]1) ∈ II)
47	42, 46	ax-mp 5	. . . . . . . 8 ⊢ ((1 / 2)(,]1) ∈ II
48		halflt1 12121	. . . . . . . . . 10 ⊢ (1 / 2) < 1
49		halfre 12117	. . . . . . . . . . . . . 14 ⊢ (1 / 2) ∈ ℝ
50	49	rexri 10964	. . . . . . . . . . . . 13 ⊢ (1 / 2) ∈ ℝ*
51		elioc2 13071	. . . . . . . . . . . . 13 ⊢ (((1 / 2) ∈ ℝ* ∧ 1 ∈ ℝ) → (1 ∈ ((1 / 2)(,]1) ↔ (1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1)))
52	50, 4, 51	mp2an 688	. . . . . . . . . . . 12 ⊢ (1 ∈ ((1 / 2)(,]1) ↔ (1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1))
53	52	biimpri 227	. . . . . . . . . . 11 ⊢ ((1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1) → 1 ∈ ((1 / 2)(,]1))
54	53	snssd 4739	. . . . . . . . . 10 ⊢ ((1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1) → {1} ⊆ ((1 / 2)(,]1))
55	4, 48, 43, 54	mp3an 1459	. . . . . . . . 9 ⊢ {1} ⊆ ((1 / 2)(,]1)
56		iocssicc 13098	. . . . . . . . 9 ⊢ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1)
57	55, 56	pm3.2i 470	. . . . . . . 8 ⊢ ({1} ⊆ ((1 / 2)(,]1) ∧ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1))
58		sseq2 3943	. . . . . . . . . 10 ⊢ (ℎ = ((1 / 2)(,]1) → ({1} ⊆ ℎ ↔ {1} ⊆ ((1 / 2)(,]1)))
59		sseq1 3942	. . . . . . . . . 10 ⊢ (ℎ = ((1 / 2)(,]1) → (ℎ ⊆ ((1 / 2)[,]1) ↔ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1)))
60	58, 59	anbi12d 630	. . . . . . . . 9 ⊢ (ℎ = ((1 / 2)(,]1) → (({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1)) ↔ ({1} ⊆ ((1 / 2)(,]1) ∧ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1))))
61	60	rspcev 3552	. . . . . . . 8 ⊢ ((((1 / 2)(,]1) ∈ II ∧ ({1} ⊆ ((1 / 2)(,]1) ∧ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1))) → ∃ℎ ∈ II ({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1)))
62	47, 57, 61	mp2an 688	. . . . . . 7 ⊢ ∃ℎ ∈ II ({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1))
63	55, 56	sstri 3926	. . . . . . . . 9 ⊢ {1} ⊆ ((1 / 2)[,]1)
64	63, 45	sstri 3926	. . . . . . . 8 ⊢ {1} ⊆ (0[,]1)
65	35	isnei 22162	. . . . . . . 8 ⊢ ((II ∈ Top ∧ {1} ⊆ (0[,]1)) → (((1 / 2)[,]1) ∈ ((nei‘II)‘{1}) ↔ (((1 / 2)[,]1) ⊆ (0[,]1) ∧ ∃ℎ ∈ II ({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1)))))
66	32, 64, 65	mp2an 688	. . . . . . 7 ⊢ (((1 / 2)[,]1) ∈ ((nei‘II)‘{1}) ↔ (((1 / 2)[,]1) ⊆ (0[,]1) ∧ ∃ℎ ∈ II ({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1))))
67	45, 62, 66	mpbir2an 707	. . . . . 6 ⊢ ((1 / 2)[,]1) ∈ ((nei‘II)‘{1})
68	67	a1i 11	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → ((1 / 2)[,]1) ∈ ((nei‘II)‘{1}))
69		simprr 769	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑇 ⊆ (◡𝑓 “ {1}))
70	2, 68, 69	cnneiima 46098	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ ((nei‘𝐽)‘𝑇))
71		icccldii 46100	. . . . . 6 ⊢ ((0 ≤ 0 ∧ (1 / 3) ≤ 1) → (0[,](1 / 3)) ∈ (Clsd‘II))
72	5, 13, 71	mp2an 688	. . . . 5 ⊢ (0[,](1 / 3)) ∈ (Clsd‘II)
73		cnclima 22327	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (0[,](1 / 3)) ∈ (Clsd‘II)) → (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽))
74	2, 72, 73	sylancl 585	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽))
75		icccldii 46100	. . . . . 6 ⊢ ((0 ≤ (1 / 2) ∧ 1 ≤ 1) → ((1 / 2)[,]1) ∈ (Clsd‘II))
76	42, 43, 75	mp2an 688	. . . . 5 ⊢ ((1 / 2)[,]1) ∈ (Clsd‘II)
77		cnclima 22327	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ ((1 / 2)[,]1) ∈ (Clsd‘II)) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽))
78	2, 76, 77	sylancl 585	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽))
79		eqid 2738	. . . . . . . 8 ⊢ ∪ 𝐽 = ∪ 𝐽
80	79, 35	cnf 22305	. . . . . . 7 ⊢ (𝑓 ∈ (𝐽 Cn II) → 𝑓:∪ 𝐽⟶(0[,]1))
81	80	ffund 6588	. . . . . 6 ⊢ (𝑓 ∈ (𝐽 Cn II) → Fun 𝑓)
82	2, 81	syl 17	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → Fun 𝑓)
83		0xr 10953	. . . . . . 7 ⊢ 0 ∈ ℝ*
84		1xr 10965	. . . . . . 7 ⊢ 1 ∈ ℝ*
85		2lt3 12075	. . . . . . . 8 ⊢ 2 < 3
86		2re 11977	. . . . . . . . 9 ⊢ 2 ∈ ℝ
87		2pos 12006	. . . . . . . . 9 ⊢ 0 < 2
88		3pos 12008	. . . . . . . . 9 ⊢ 0 < 3
89	86, 6, 87, 88	ltrecii 11821	. . . . . . . 8 ⊢ (2 < 3 ↔ (1 / 3) < (1 / 2))
90	85, 89	mpbi 229	. . . . . . 7 ⊢ (1 / 3) < (1 / 2)
91		iccdisj2 46079	. . . . . . 7 ⊢ ((0 ∈ ℝ* ∧ 1 ∈ ℝ* ∧ (1 / 3) < (1 / 2)) → ((0[,](1 / 3)) ∩ ((1 / 2)[,]1)) = ∅)
92	83, 84, 90, 91	mp3an 1459	. . . . . 6 ⊢ ((0[,](1 / 3)) ∩ ((1 / 2)[,]1)) = ∅
93	92	a1i 11	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → ((0[,](1 / 3)) ∩ ((1 / 2)[,]1)) = ∅)
94		ssidd 3940	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ⊆ (◡𝑓 “ (0[,](1 / 3))))
95		ssidd 3940	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ ((1 / 2)[,]1)) ⊆ (◡𝑓 “ ((1 / 2)[,]1)))
96	82, 93, 94, 95	predisj 46044	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅)
97		eleq1 2826	. . . . . 6 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → (𝑛 ∈ (Clsd‘𝐽) ↔ (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽)))
98		ineq1 4136	. . . . . . 7 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → (𝑛 ∩ 𝑚) = ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚))
99	98	eqeq1d 2740	. . . . . 6 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → ((𝑛 ∩ 𝑚) = ∅ ↔ ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅))
100	97, 99	3anbi13d 1436	. . . . 5 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → ((𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅) ↔ ((◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅)))
101		eleq1 2826	. . . . . 6 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → (𝑚 ∈ (Clsd‘𝐽) ↔ (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽)))
102		ineq2 4137	. . . . . . 7 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))))
103	102	eqeq1d 2740	. . . . . 6 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → (((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅ ↔ ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅))
104	101, 103	3anbi23d 1437	. . . . 5 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → (((◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅) ↔ ((◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽) ∧ (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽) ∧ ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅)))
105	100, 104	rspc2ev 3564	. . . 4 ⊢ (((◡𝑓 “ (0[,](1 / 3))) ∈ ((nei‘𝐽)‘𝑆) ∧ (◡𝑓 “ ((1 / 2)[,]1)) ∈ ((nei‘𝐽)‘𝑇) ∧ ((◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽) ∧ (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽) ∧ ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅)) → ∃𝑛 ∈ ((nei‘𝐽)‘𝑆)∃𝑚 ∈ ((nei‘𝐽)‘𝑇)(𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅))
106	41, 70, 74, 78, 96, 105	syl113anc 1380	. . 3 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → ∃𝑛 ∈ ((nei‘𝐽)‘𝑆)∃𝑚 ∈ ((nei‘𝐽)‘𝑇)(𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅))
107	106	rexlimiva 3209	. 2 ⊢ (∃𝑓 ∈ (𝐽 Cn II)(𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1})) → ∃𝑛 ∈ ((nei‘𝐽)‘𝑆)∃𝑚 ∈ ((nei‘𝐽)‘𝑇)(𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅))
108	1, 107	syl 17	1 ⊢ (𝜑 → ∃𝑛 ∈ ((nei‘𝐽)‘𝑆)∃𝑚 ∈ ((nei‘𝐽)‘𝑇)(𝑛 ∈ (Clsd‘𝐽) ∧ 𝑚 ∈ (Clsd‘𝐽) ∧ (𝑛 ∩ 𝑚) = ∅))

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 395   ∧ w3a 1085   = wceq 1539   ∈ wcel 2108  ∃wrex 3064   ∩ cin 3882   ⊆ wss 3883  ∅c0 4253  {csn 4558  ∪ cuni 4836   class class class wbr 5070  ^◡ccnv 5579   “ cima 5583  Fun wfun 6412  ‘cfv 6418  (class class class)co 7255  ℝcr 10801  0cc0 10802  1c1 10803  ℝ^*cxr 10939   < clt 10940   ≤ cle 10941   / cdiv 11562  2c2 11958  3c3 11959  (,]cioc 13009  [,)cico 13010  [,]cicc 13011  Topctop 21950  Clsdccld 22075  neicnei 22156   Cn ccn 22283  IIcii 23944

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879  ax-pre-sup 10880

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-iin 4924  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-om 7688  df-1st 7804  df-2nd 7805  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-1o 8267  df-er 8456  df-map 8575  df-en 8692  df-dom 8693  df-sdom 8694  df-fin 8695  df-fi 9100  df-sup 9131  df-inf 9132  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-div 11563  df-nn 11904  df-2 11966  df-3 11967  df-n0 12164  df-z 12250  df-uz 12512  df-q 12618  df-rp 12660  df-xneg 12777  df-xadd 12778  df-xmul 12779  df-ioo 13012  df-ioc 13013  df-ico 13014  df-icc 13015  df-seq 13650  df-exp 13711  df-cj 14738  df-re 14739  df-im 14740  df-sqrt 14874  df-abs 14875  df-rest 17050  df-topgen 17071  df-ordt 17129  df-ps 18199  df-tsr 18200  df-psmet 20502  df-xmet 20503  df-met 20504  df-bl 20505  df-mopn 20506  df-top 21951  df-topon 21968  df-bases 22004  df-cld 22078  df-ntr 22079  df-nei 22157  df-cn 22286  df-ii 23946

This theorem is referenced by: (None)