Theorem sepfsepc 45660

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 486	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑓 ∈ (𝐽 Cn II))
3		0re 10694	. . . . . . . 8 ⊢ 0 ∈ ℝ
4		1re 10692	. . . . . . . 8 ⊢ 1 ∈ ℝ
5		0le0 11788	. . . . . . . 8 ⊢ 0 ≤ 0
6		3re 11767	. . . . . . . . . 10 ⊢ 3 ∈ ℝ
7		3ne0 11793	. . . . . . . . . 10 ⊢ 3 ≠ 0
8	6, 7	rereccli 11456	. . . . . . . . 9 ⊢ (1 / 3) ∈ ℝ
9		1lt3 11860	. . . . . . . . . . 11 ⊢ 1 < 3
10		recgt1i 11588	. . . . . . . . . . 11 ⊢ ((3 ∈ ℝ ∧ 1 < 3) → (0 < (1 / 3) ∧ (1 / 3) < 1))
11	6, 9, 10	mp2an 691	. . . . . . . . . 10 ⊢ (0 < (1 / 3) ∧ (1 / 3) < 1)
12	11	simpri 489	. . . . . . . . 9 ⊢ (1 / 3) < 1
13	8, 4, 12	ltleii 10814	. . . . . . . 8 ⊢ (1 / 3) ≤ 1
14		iccss 12860	. . . . . . . 8 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ 0 ∧ (1 / 3) ≤ 1)) → (0[,](1 / 3)) ⊆ (0[,]1))
15	3, 4, 5, 13, 14	mp4an 692	. . . . . . 7 ⊢ (0[,](1 / 3)) ⊆ (0[,]1)
16		i0oii 45652	. . . . . . . . 9 ⊢ ((1 / 3) ≤ 1 → (0[,)(1 / 3)) ∈ II)
17	13, 16	ax-mp 5	. . . . . . . 8 ⊢ (0[,)(1 / 3)) ∈ II
18	11	simpli 487	. . . . . . . . . 10 ⊢ 0 < (1 / 3)
19	8	rexri 10750	. . . . . . . . . . . . 13 ⊢ (1 / 3) ∈ ℝ*
20		elico2 12856	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ ∧ (1 / 3) ∈ ℝ*) → (0 ∈ (0[,)(1 / 3)) ↔ (0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3))))
21	3, 19, 20	mp2an 691	. . . . . . . . . . . 12 ⊢ (0 ∈ (0[,)(1 / 3)) ↔ (0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)))
22	21	biimpri 231	. . . . . . . . . . 11 ⊢ ((0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)) → 0 ∈ (0[,)(1 / 3)))
23	22	snssd 4702	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ ∧ 0 ≤ 0 ∧ 0 < (1 / 3)) → {0} ⊆ (0[,)(1 / 3)))
24	3, 5, 18, 23	mp3an 1458	. . . . . . . . 9 ⊢ {0} ⊆ (0[,)(1 / 3))
25		icossicc 12881	. . . . . . . . 9 ⊢ (0[,)(1 / 3)) ⊆ (0[,](1 / 3))
26	24, 25	pm3.2i 474	. . . . . . . 8 ⊢ ({0} ⊆ (0[,)(1 / 3)) ∧ (0[,)(1 / 3)) ⊆ (0[,](1 / 3)))
27		sseq2 3920	. . . . . . . . . 10 ⊢ (𝑔 = (0[,)(1 / 3)) → ({0} ⊆ 𝑔 ↔ {0} ⊆ (0[,)(1 / 3))))
28		sseq1 3919	. . . . . . . . . 10 ⊢ (𝑔 = (0[,)(1 / 3)) → (𝑔 ⊆ (0[,](1 / 3)) ↔ (0[,)(1 / 3)) ⊆ (0[,](1 / 3))))
29	27, 28	anbi12d 633	. . . . . . . . 9 ⊢ (𝑔 = (0[,)(1 / 3)) → (({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3))) ↔ ({0} ⊆ (0[,)(1 / 3)) ∧ (0[,)(1 / 3)) ⊆ (0[,](1 / 3)))))
30	29	rspcev 3543	. . . . . . . 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 691	. . . . . . 7 ⊢ ∃𝑔 ∈ II ({0} ⊆ 𝑔 ∧ 𝑔 ⊆ (0[,](1 / 3)))
32		iitop 23594	. . . . . . . 8 ⊢ II ∈ Top
33	24, 25	sstri 3903	. . . . . . . . 9 ⊢ {0} ⊆ (0[,](1 / 3))
34	33, 15	sstri 3903	. . . . . . . 8 ⊢ {0} ⊆ (0[,]1)
35		iiuni 23595	. . . . . . . . 9 ⊢ (0[,]1) = ∪ II
36	35	isnei 21816	. . . . . . . 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 691	. . . . . . 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 710	. . . . . 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 770	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑆 ⊆ (◡𝑓 “ {0}))
41	2, 39, 40	cnneiima 45649	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ∈ ((nei‘𝐽)‘𝑆))
42		halfge0 11904	. . . . . . . 8 ⊢ 0 ≤ (1 / 2)
43		1le1 11319	. . . . . . . 8 ⊢ 1 ≤ 1
44		iccss 12860	. . . . . . . 8 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ (1 / 2) ∧ 1 ≤ 1)) → ((1 / 2)[,]1) ⊆ (0[,]1))
45	3, 4, 42, 43, 44	mp4an 692	. . . . . . 7 ⊢ ((1 / 2)[,]1) ⊆ (0[,]1)
46		io1ii 45653	. . . . . . . . 9 ⊢ (0 ≤ (1 / 2) → ((1 / 2)(,]1) ∈ II)
47	42, 46	ax-mp 5	. . . . . . . 8 ⊢ ((1 / 2)(,]1) ∈ II
48		halflt1 11905	. . . . . . . . . 10 ⊢ (1 / 2) < 1
49		halfre 11901	. . . . . . . . . . . . . 14 ⊢ (1 / 2) ∈ ℝ
50	49	rexri 10750	. . . . . . . . . . . . 13 ⊢ (1 / 2) ∈ ℝ*
51		elioc2 12855	. . . . . . . . . . . . 13 ⊢ (((1 / 2) ∈ ℝ* ∧ 1 ∈ ℝ) → (1 ∈ ((1 / 2)(,]1) ↔ (1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1)))
52	50, 4, 51	mp2an 691	. . . . . . . . . . . 12 ⊢ (1 ∈ ((1 / 2)(,]1) ↔ (1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1))
53	52	biimpri 231	. . . . . . . . . . 11 ⊢ ((1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1) → 1 ∈ ((1 / 2)(,]1))
54	53	snssd 4702	. . . . . . . . . 10 ⊢ ((1 ∈ ℝ ∧ (1 / 2) < 1 ∧ 1 ≤ 1) → {1} ⊆ ((1 / 2)(,]1))
55	4, 48, 43, 54	mp3an 1458	. . . . . . . . 9 ⊢ {1} ⊆ ((1 / 2)(,]1)
56		iocssicc 12882	. . . . . . . . 9 ⊢ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1)
57	55, 56	pm3.2i 474	. . . . . . . 8 ⊢ ({1} ⊆ ((1 / 2)(,]1) ∧ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1))
58		sseq2 3920	. . . . . . . . . 10 ⊢ (ℎ = ((1 / 2)(,]1) → ({1} ⊆ ℎ ↔ {1} ⊆ ((1 / 2)(,]1)))
59		sseq1 3919	. . . . . . . . . 10 ⊢ (ℎ = ((1 / 2)(,]1) → (ℎ ⊆ ((1 / 2)[,]1) ↔ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1)))
60	58, 59	anbi12d 633	. . . . . . . . 9 ⊢ (ℎ = ((1 / 2)(,]1) → (({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1)) ↔ ({1} ⊆ ((1 / 2)(,]1) ∧ ((1 / 2)(,]1) ⊆ ((1 / 2)[,]1))))
61	60	rspcev 3543	. . . . . . . 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 691	. . . . . . 7 ⊢ ∃ℎ ∈ II ({1} ⊆ ℎ ∧ ℎ ⊆ ((1 / 2)[,]1))
63	55, 56	sstri 3903	. . . . . . . . 9 ⊢ {1} ⊆ ((1 / 2)[,]1)
64	63, 45	sstri 3903	. . . . . . . 8 ⊢ {1} ⊆ (0[,]1)
65	35	isnei 21816	. . . . . . . 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 691	. . . . . . 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 710	. . . . . 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 772	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → 𝑇 ⊆ (◡𝑓 “ {1}))
70	2, 68, 69	cnneiima 45649	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ ((nei‘𝐽)‘𝑇))
71		icccldii 45651	. . . . . 6 ⊢ ((0 ≤ 0 ∧ (1 / 3) ≤ 1) → (0[,](1 / 3)) ∈ (Clsd‘II))
72	5, 13, 71	mp2an 691	. . . . 5 ⊢ (0[,](1 / 3)) ∈ (Clsd‘II)
73		cnclima 21981	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (0[,](1 / 3)) ∈ (Clsd‘II)) → (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽))
74	2, 72, 73	sylancl 589	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽))
75		icccldii 45651	. . . . . 6 ⊢ ((0 ≤ (1 / 2) ∧ 1 ≤ 1) → ((1 / 2)[,]1) ∈ (Clsd‘II))
76	42, 43, 75	mp2an 691	. . . . 5 ⊢ ((1 / 2)[,]1) ∈ (Clsd‘II)
77		cnclima 21981	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ ((1 / 2)[,]1) ∈ (Clsd‘II)) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽))
78	2, 76, 77	sylancl 589	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽))
79		eqid 2758	. . . . . . . 8 ⊢ ∪ 𝐽 = ∪ 𝐽
80	79, 35	cnf 21959	. . . . . . 7 ⊢ (𝑓 ∈ (𝐽 Cn II) → 𝑓:∪ 𝐽⟶(0[,]1))
81	80	ffund 6507	. . . . . 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 10739	. . . . . . 7 ⊢ 0 ∈ ℝ*
84		1xr 10751	. . . . . . 7 ⊢ 1 ∈ ℝ*
85		2lt3 11859	. . . . . . . 8 ⊢ 2 < 3
86		2re 11761	. . . . . . . . 9 ⊢ 2 ∈ ℝ
87		2pos 11790	. . . . . . . . 9 ⊢ 0 < 2
88		3pos 11792	. . . . . . . . 9 ⊢ 0 < 3
89	86, 6, 87, 88	ltrecii 11607	. . . . . . . 8 ⊢ (2 < 3 ↔ (1 / 3) < (1 / 2))
90	85, 89	mpbi 233	. . . . . . 7 ⊢ (1 / 3) < (1 / 2)
91		iccdisj2 45632	. . . . . . 7 ⊢ ((0 ∈ ℝ* ∧ 1 ∈ ℝ* ∧ (1 / 3) < (1 / 2)) → ((0[,](1 / 3)) ∩ ((1 / 2)[,]1)) = ∅)
92	83, 84, 90, 91	mp3an 1458	. . . . . 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 3917	. . . . 5 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → (◡𝑓 “ (0[,](1 / 3))) ⊆ (◡𝑓 “ (0[,](1 / 3))))
95		ssidd 3917	. . . . 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 45630	. . . 4 ⊢ ((𝑓 ∈ (𝐽 Cn II) ∧ (𝑆 ⊆ (◡𝑓 “ {0}) ∧ 𝑇 ⊆ (◡𝑓 “ {1}))) → ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅)
97		eleq1 2839	. . . . . 6 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → (𝑛 ∈ (Clsd‘𝐽) ↔ (◡𝑓 “ (0[,](1 / 3))) ∈ (Clsd‘𝐽)))
98		ineq1 4111	. . . . . . 7 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → (𝑛 ∩ 𝑚) = ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚))
99	98	eqeq1d 2760	. . . . . 6 ⊢ (𝑛 = (◡𝑓 “ (0[,](1 / 3))) → ((𝑛 ∩ 𝑚) = ∅ ↔ ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅))
100	97, 99	3anbi13d 1435	. . . . 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 2839	. . . . . 6 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → (𝑚 ∈ (Clsd‘𝐽) ↔ (◡𝑓 “ ((1 / 2)[,]1)) ∈ (Clsd‘𝐽)))
102		ineq2 4113	. . . . . . 7 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → ((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))))
103	102	eqeq1d 2760	. . . . . 6 ⊢ (𝑚 = (◡𝑓 “ ((1 / 2)[,]1)) → (((◡𝑓 “ (0[,](1 / 3))) ∩ 𝑚) = ∅ ↔ ((◡𝑓 “ (0[,](1 / 3))) ∩ (◡𝑓 “ ((1 / 2)[,]1))) = ∅))
104	101, 103	3anbi23d 1436	. . . . 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 3555	. . . 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 1379	. . 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 3205	. 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 209   ∧ wa 399   ∧ w3a 1084   = wceq 1538   ∈ wcel 2111  ∃wrex 3071   ∩ cin 3859   ⊆ wss 3860  ∅c0 4227  {csn 4525  ∪ cuni 4801   class class class wbr 5036  ^◡ccnv 5527   “ cima 5531  Fun wfun 6334  ‘cfv 6340  (class class class)co 7156  ℝcr 10587  0cc0 10588  1c1 10589  ℝ^*cxr 10725   < clt 10726   ≤ cle 10727   / cdiv 11348  2c2 11742  3c3 11743  (,]cioc 12793  [,)cico 12794  [,]cicc 12795  Topctop 21606  Clsdccld 21729  neicnei 21810   Cn ccn 21937  IIcii 23589

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-rep 5160  ax-sep 5173  ax-nul 5180  ax-pow 5238  ax-pr 5302  ax-un 7465  ax-cnex 10644  ax-resscn 10645  ax-1cn 10646  ax-icn 10647  ax-addcl 10648  ax-addrcl 10649  ax-mulcl 10650  ax-mulrcl 10651  ax-mulcom 10652  ax-addass 10653  ax-mulass 10654  ax-distr 10655  ax-i2m1 10656  ax-1ne0 10657  ax-1rid 10658  ax-rnegex 10659  ax-rrecex 10660  ax-cnre 10661  ax-pre-lttri 10662  ax-pre-lttrn 10663  ax-pre-ltadd 10664  ax-pre-mulgt0 10665  ax-pre-sup 10666

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-nel 3056  df-ral 3075  df-rex 3076  df-reu 3077  df-rmo 3078  df-rab 3079  df-v 3411  df-sbc 3699  df-csb 3808  df-dif 3863  df-un 3865  df-in 3867  df-ss 3877  df-pss 3879  df-nul 4228  df-if 4424  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4802  df-int 4842  df-iun 4888  df-iin 4889  df-br 5037  df-opab 5099  df-mpt 5117  df-tr 5143  df-id 5434  df-eprel 5439  df-po 5447  df-so 5448  df-fr 5487  df-we 5489  df-xp 5534  df-rel 5535  df-cnv 5536  df-co 5537  df-dm 5538  df-rn 5539  df-res 5540  df-ima 5541  df-pred 6131  df-ord 6177  df-on 6178  df-lim 6179  df-suc 6180  df-iota 6299  df-fun 6342  df-fn 6343  df-f 6344  df-f1 6345  df-fo 6346  df-f1o 6347  df-fv 6348  df-riota 7114  df-ov 7159  df-oprab 7160  df-mpo 7161  df-om 7586  df-1st 7699  df-2nd 7700  df-wrecs 7963  df-recs 8024  df-rdg 8062  df-1o 8118  df-er 8305  df-map 8424  df-en 8541  df-dom 8542  df-sdom 8543  df-fin 8544  df-fi 8921  df-sup 8952  df-inf 8953  df-pnf 10728  df-mnf 10729  df-xr 10730  df-ltxr 10731  df-le 10732  df-sub 10923  df-neg 10924  df-div 11349  df-nn 11688  df-2 11750  df-3 11751  df-n0 11948  df-z 12034  df-uz 12296  df-q 12402  df-rp 12444  df-xneg 12561  df-xadd 12562  df-xmul 12563  df-ioo 12796  df-ioc 12797  df-ico 12798  df-icc 12799  df-seq 13432  df-exp 13493  df-cj 14519  df-re 14520  df-im 14521  df-sqrt 14655  df-abs 14656  df-rest 16767  df-topgen 16788  df-ordt 16845  df-ps 17889  df-tsr 17890  df-psmet 20171  df-xmet 20172  df-met 20173  df-bl 20174  df-mopn 20175  df-top 21607  df-topon 21624  df-bases 21659  df-cld 21732  df-ntr 21733  df-nei 21811  df-cn 21940  df-ii 23591

This theorem is referenced by: (None)