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Theorem utop2nei 23747

Description: For any symmetrical entourage 𝑉 and any relation 𝑀, build a neighborhood of 𝑀. First part of proposition 2 of [BourbakiTop1] p. II.4. (Contributed by Thierry Arnoux, 14-Jan-2018.)

**Hypothesis**
Ref	Expression
utoptop.1	⊢ 𝐽 = (unifTop‘𝑈)

**Assertion**
Ref	Expression
utop2nei	⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀))

Proof of Theorem utop2nei Dummy variables 𝑟 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		utoptop.1	. . . . . . . 8 ⊢ 𝐽 = (unifTop‘𝑈)
2		utoptop 23731	. . . . . . . 8 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → (unifTop‘𝑈) ∈ Top)
3	1, 2	eqeltrid 2838	. . . . . . 7 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → 𝐽 ∈ Top)
4		txtop 23065	. . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝐽 ∈ Top) → (𝐽 ×_t 𝐽) ∈ Top)
5	3, 3, 4	syl2anc 585	. . . . . 6 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → (𝐽 ×_t 𝐽) ∈ Top)
6	5	3ad2ant1 1134	. . . . 5 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝐽 ×_t 𝐽) ∈ Top)
7	6	adantr 482	. . . 4 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → (𝐽 ×_t 𝐽) ∈ Top)
8		0nei 22624	. . . 4 ⊢ ((𝐽 ×_t 𝐽) ∈ Top → ∅ ∈ ((nei‘(𝐽 ×_t 𝐽))‘∅))
9	7, 8	syl 17	. . 3 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → ∅ ∈ ((nei‘(𝐽 ×_t 𝐽))‘∅))
10		coeq1 5856	. . . . . . 7 ⊢ (𝑀 = ∅ → (𝑀 ∘ 𝑉) = (∅ ∘ 𝑉))
11		co01 6258	. . . . . . 7 ⊢ (∅ ∘ 𝑉) = ∅
12	10, 11	eqtrdi 2789	. . . . . 6 ⊢ (𝑀 = ∅ → (𝑀 ∘ 𝑉) = ∅)
13	12	coeq2d 5861	. . . . 5 ⊢ (𝑀 = ∅ → (𝑉 ∘ (𝑀 ∘ 𝑉)) = (𝑉 ∘ ∅))
14		co02 6257	. . . . 5 ⊢ (𝑉 ∘ ∅) = ∅
15	13, 14	eqtrdi 2789	. . . 4 ⊢ (𝑀 = ∅ → (𝑉 ∘ (𝑀 ∘ 𝑉)) = ∅)
16	15	adantl 483	. . 3 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → (𝑉 ∘ (𝑀 ∘ 𝑉)) = ∅)
17		simpr 486	. . . 4 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → 𝑀 = ∅)
18	17	fveq2d 6893	. . 3 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → ((nei‘(𝐽 ×_t 𝐽))‘𝑀) = ((nei‘(𝐽 ×_t 𝐽))‘∅))
19	9, 16, 18	3eltr4d 2849	. 2 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 = ∅) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀))
20	6	adantr 482	. . . . . 6 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝐽 ×_t 𝐽) ∈ Top)
21		simpl1 1192	. . . . . . . . . 10 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝑈 ∈ (UnifOn‘𝑋))
22	21, 3	syl 17	. . . . . . . . 9 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝐽 ∈ Top)
23		simpl2l 1227	. . . . . . . . . 10 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝑉 ∈ 𝑈)
24		simp3 1139	. . . . . . . . . . . 12 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → 𝑀 ⊆ (𝑋 × 𝑋))
25	24	sselda 3982	. . . . . . . . . . 11 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝑟 ∈ (𝑋 × 𝑋))
26		xp1st 8004	. . . . . . . . . . 11 ⊢ (𝑟 ∈ (𝑋 × 𝑋) → (1^st ‘𝑟) ∈ 𝑋)
27	25, 26	syl 17	. . . . . . . . . 10 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (1^st ‘𝑟) ∈ 𝑋)
28	1	utopsnnei 23746	. . . . . . . . . 10 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑉 ∈ 𝑈 ∧ (1^st ‘𝑟) ∈ 𝑋) → (𝑉 “ {(1^st ‘𝑟)}) ∈ ((nei‘𝐽)‘{(1^st ‘𝑟)}))
29	21, 23, 27, 28	syl3anc 1372	. . . . . . . . 9 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝑉 “ {(1^st ‘𝑟)}) ∈ ((nei‘𝐽)‘{(1^st ‘𝑟)}))
30		xp2nd 8005	. . . . . . . . . . 11 ⊢ (𝑟 ∈ (𝑋 × 𝑋) → (2^nd ‘𝑟) ∈ 𝑋)
31	25, 30	syl 17	. . . . . . . . . 10 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (2^nd ‘𝑟) ∈ 𝑋)
32	1	utopsnnei 23746	. . . . . . . . . 10 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑉 ∈ 𝑈 ∧ (2^nd ‘𝑟) ∈ 𝑋) → (𝑉 “ {(2^nd ‘𝑟)}) ∈ ((nei‘𝐽)‘{(2^nd ‘𝑟)}))
33	21, 23, 31, 32	syl3anc 1372	. . . . . . . . 9 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝑉 “ {(2^nd ‘𝑟)}) ∈ ((nei‘𝐽)‘{(2^nd ‘𝑟)}))
34		eqid 2733	. . . . . . . . . 10 ⊢ ∪ 𝐽 = ∪ 𝐽
35	34, 34	neitx 23103	. . . . . . . . 9 ⊢ (((𝐽 ∈ Top ∧ 𝐽 ∈ Top) ∧ ((𝑉 “ {(1^st ‘𝑟)}) ∈ ((nei‘𝐽)‘{(1^st ‘𝑟)}) ∧ (𝑉 “ {(2^nd ‘𝑟)}) ∈ ((nei‘𝐽)‘{(2^nd ‘𝑟)}))) → ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∈ ((nei‘(𝐽 ×_t 𝐽))‘({(1^st ‘𝑟)} × {(2^nd ‘𝑟)})))
36	22, 22, 29, 33, 35	syl22anc 838	. . . . . . . 8 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∈ ((nei‘(𝐽 ×_t 𝐽))‘({(1^st ‘𝑟)} × {(2^nd ‘𝑟)})))
37		fvex 6902	. . . . . . . . . 10 ⊢ (1^st ‘𝑟) ∈ V
38		fvex 6902	. . . . . . . . . 10 ⊢ (2^nd ‘𝑟) ∈ V
39	37, 38	xpsn 7136	. . . . . . . . 9 ⊢ ({(1^st ‘𝑟)} × {(2^nd ‘𝑟)}) = {⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩}
40	39	fveq2i 6892	. . . . . . . 8 ⊢ ((nei‘(𝐽 ×_t 𝐽))‘({(1^st ‘𝑟)} × {(2^nd ‘𝑟)})) = ((nei‘(𝐽 ×_t 𝐽))‘{⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩})
41	36, 40	eleqtrdi 2844	. . . . . . 7 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩}))
42	24	adantr 482	. . . . . . . . . . 11 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝑀 ⊆ (𝑋 × 𝑋))
43		xpss 5692	. . . . . . . . . . . . 13 ⊢ (𝑋 × 𝑋) ⊆ (V × V)
44		sstr 3990	. . . . . . . . . . . . 13 ⊢ ((𝑀 ⊆ (𝑋 × 𝑋) ∧ (𝑋 × 𝑋) ⊆ (V × V)) → 𝑀 ⊆ (V × V))
45	43, 44	mpan2 690	. . . . . . . . . . . 12 ⊢ (𝑀 ⊆ (𝑋 × 𝑋) → 𝑀 ⊆ (V × V))
46		df-rel 5683	. . . . . . . . . . . 12 ⊢ (Rel 𝑀 ↔ 𝑀 ⊆ (V × V))
47	45, 46	sylibr 233	. . . . . . . . . . 11 ⊢ (𝑀 ⊆ (𝑋 × 𝑋) → Rel 𝑀)
48	42, 47	syl 17	. . . . . . . . . 10 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → Rel 𝑀)
49		1st2nd 8022	. . . . . . . . . 10 ⊢ ((Rel 𝑀 ∧ 𝑟 ∈ 𝑀) → 𝑟 = ⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩)
50	48, 49	sylancom 589	. . . . . . . . 9 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → 𝑟 = ⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩)
51	50	sneqd 4640	. . . . . . . 8 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → {𝑟} = {⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩})
52	51	fveq2d 6893	. . . . . . 7 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}) = ((nei‘(𝐽 ×_t 𝐽))‘{⟨(1^st ‘𝑟), (2^nd ‘𝑟)⟩}))
53	41, 52	eleqtrrd 2837	. . . . . 6 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}))
54		relxp 5694	. . . . . . . . . . 11 ⊢ Rel ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))
55	54	a1i 11	. . . . . . . . . 10 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → Rel ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})))
56		1st2nd 8022	. . . . . . . . . 10 ⊢ ((Rel ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑧 = ⟨(1^st ‘𝑧), (2^nd ‘𝑧)⟩)
57	55, 56	sylancom 589	. . . . . . . . 9 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑧 = ⟨(1^st ‘𝑧), (2^nd ‘𝑧)⟩)
58		simpll2 1214	. . . . . . . . . . . . 13 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉))
59	58	simprd 497	. . . . . . . . . . . 12 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → ^◡𝑉 = 𝑉)
60		simpll1 1213	. . . . . . . . . . . . . 14 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑈 ∈ (UnifOn‘𝑋))
61	58	simpld 496	. . . . . . . . . . . . . 14 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑉 ∈ 𝑈)
62		ustrel 23708	. . . . . . . . . . . . . 14 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑉 ∈ 𝑈) → Rel 𝑉)
63	60, 61, 62	syl2anc 585	. . . . . . . . . . . . 13 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → Rel 𝑉)
64		xp1st 8004	. . . . . . . . . . . . . 14 ⊢ (𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) → (1^st ‘𝑧) ∈ (𝑉 “ {(1^st ‘𝑟)}))
65	64	adantl 483	. . . . . . . . . . . . 13 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (1^st ‘𝑧) ∈ (𝑉 “ {(1^st ‘𝑟)}))
66		elrelimasn 6082	. . . . . . . . . . . . . 14 ⊢ (Rel 𝑉 → ((1^st ‘𝑧) ∈ (𝑉 “ {(1^st ‘𝑟)}) ↔ (1^st ‘𝑟)𝑉(1^st ‘𝑧)))
67	66	biimpa 478	. . . . . . . . . . . . 13 ⊢ ((Rel 𝑉 ∧ (1^st ‘𝑧) ∈ (𝑉 “ {(1^st ‘𝑟)})) → (1^st ‘𝑟)𝑉(1^st ‘𝑧))
68	63, 65, 67	syl2anc 585	. . . . . . . . . . . 12 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (1^st ‘𝑟)𝑉(1^st ‘𝑧))
69		fvex 6902	. . . . . . . . . . . . . . 15 ⊢ (1^st ‘𝑧) ∈ V
70	37, 69	brcnv 5881	. . . . . . . . . . . . . 14 ⊢ ((1^st ‘𝑟)^◡𝑉(1^st ‘𝑧) ↔ (1^st ‘𝑧)𝑉(1^st ‘𝑟))
71		breq 5150	. . . . . . . . . . . . . 14 ⊢ (^◡𝑉 = 𝑉 → ((1^st ‘𝑟)^◡𝑉(1^st ‘𝑧) ↔ (1^st ‘𝑟)𝑉(1^st ‘𝑧)))
72	70, 71	bitr3id 285	. . . . . . . . . . . . 13 ⊢ (^◡𝑉 = 𝑉 → ((1^st ‘𝑧)𝑉(1^st ‘𝑟) ↔ (1^st ‘𝑟)𝑉(1^st ‘𝑧)))
73	72	biimpar 479	. . . . . . . . . . . 12 ⊢ ((^◡𝑉 = 𝑉 ∧ (1^st ‘𝑟)𝑉(1^st ‘𝑧)) → (1^st ‘𝑧)𝑉(1^st ‘𝑟))
74	59, 68, 73	syl2anc 585	. . . . . . . . . . 11 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (1^st ‘𝑧)𝑉(1^st ‘𝑟))
75		simpll3 1215	. . . . . . . . . . . 12 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑀 ⊆ (𝑋 × 𝑋))
76		simplr 768	. . . . . . . . . . . 12 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑟 ∈ 𝑀)
77		1st2ndbr 8025	. . . . . . . . . . . . 13 ⊢ ((Rel 𝑀 ∧ 𝑟 ∈ 𝑀) → (1^st ‘𝑟)𝑀(2^nd ‘𝑟))
78	47, 77	sylan 581	. . . . . . . . . . . 12 ⊢ ((𝑀 ⊆ (𝑋 × 𝑋) ∧ 𝑟 ∈ 𝑀) → (1^st ‘𝑟)𝑀(2^nd ‘𝑟))
79	75, 76, 78	syl2anc 585	. . . . . . . . . . 11 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (1^st ‘𝑟)𝑀(2^nd ‘𝑟))
80		xp2nd 8005	. . . . . . . . . . . . 13 ⊢ (𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) → (2^nd ‘𝑧) ∈ (𝑉 “ {(2^nd ‘𝑟)}))
81	80	adantl 483	. . . . . . . . . . . 12 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (2^nd ‘𝑧) ∈ (𝑉 “ {(2^nd ‘𝑟)}))
82		elrelimasn 6082	. . . . . . . . . . . . 13 ⊢ (Rel 𝑉 → ((2^nd ‘𝑧) ∈ (𝑉 “ {(2^nd ‘𝑟)}) ↔ (2^nd ‘𝑟)𝑉(2^nd ‘𝑧)))
83	82	biimpa 478	. . . . . . . . . . . 12 ⊢ ((Rel 𝑉 ∧ (2^nd ‘𝑧) ∈ (𝑉 “ {(2^nd ‘𝑟)})) → (2^nd ‘𝑟)𝑉(2^nd ‘𝑧))
84	63, 81, 83	syl2anc 585	. . . . . . . . . . 11 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (2^nd ‘𝑟)𝑉(2^nd ‘𝑧))
85	69, 38, 37	3pm3.2i 1340	. . . . . . . . . . . . 13 ⊢ ((1^st ‘𝑧) ∈ V ∧ (2^nd ‘𝑟) ∈ V ∧ (1^st ‘𝑟) ∈ V)
86		brcogw 5867	. . . . . . . . . . . . 13 ⊢ ((((1^st ‘𝑧) ∈ V ∧ (2^nd ‘𝑟) ∈ V ∧ (1^st ‘𝑟) ∈ V) ∧ ((1^st ‘𝑧)𝑉(1^st ‘𝑟) ∧ (1^st ‘𝑟)𝑀(2^nd ‘𝑟))) → (1^st ‘𝑧)(𝑀 ∘ 𝑉)(2^nd ‘𝑟))
87	85, 86	mpan 689	. . . . . . . . . . . 12 ⊢ (((1^st ‘𝑧)𝑉(1^st ‘𝑟) ∧ (1^st ‘𝑟)𝑀(2^nd ‘𝑟)) → (1^st ‘𝑧)(𝑀 ∘ 𝑉)(2^nd ‘𝑟))
88		fvex 6902	. . . . . . . . . . . . . 14 ⊢ (2^nd ‘𝑧) ∈ V
89	69, 88, 38	3pm3.2i 1340	. . . . . . . . . . . . 13 ⊢ ((1^st ‘𝑧) ∈ V ∧ (2^nd ‘𝑧) ∈ V ∧ (2^nd ‘𝑟) ∈ V)
90		brcogw 5867	. . . . . . . . . . . . 13 ⊢ ((((1^st ‘𝑧) ∈ V ∧ (2^nd ‘𝑧) ∈ V ∧ (2^nd ‘𝑟) ∈ V) ∧ ((1^st ‘𝑧)(𝑀 ∘ 𝑉)(2^nd ‘𝑟) ∧ (2^nd ‘𝑟)𝑉(2^nd ‘𝑧))) → (1^st ‘𝑧)(𝑉 ∘ (𝑀 ∘ 𝑉))(2^nd ‘𝑧))
91	89, 90	mpan 689	. . . . . . . . . . . 12 ⊢ (((1^st ‘𝑧)(𝑀 ∘ 𝑉)(2^nd ‘𝑟) ∧ (2^nd ‘𝑟)𝑉(2^nd ‘𝑧)) → (1^st ‘𝑧)(𝑉 ∘ (𝑀 ∘ 𝑉))(2^nd ‘𝑧))
92	87, 91	sylan 581	. . . . . . . . . . 11 ⊢ ((((1^st ‘𝑧)𝑉(1^st ‘𝑟) ∧ (1^st ‘𝑟)𝑀(2^nd ‘𝑟)) ∧ (2^nd ‘𝑟)𝑉(2^nd ‘𝑧)) → (1^st ‘𝑧)(𝑉 ∘ (𝑀 ∘ 𝑉))(2^nd ‘𝑧))
93	74, 79, 84, 92	syl21anc 837	. . . . . . . . . 10 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → (1^st ‘𝑧)(𝑉 ∘ (𝑀 ∘ 𝑉))(2^nd ‘𝑧))
94		df-br 5149	. . . . . . . . . 10 ⊢ ((1^st ‘𝑧)(𝑉 ∘ (𝑀 ∘ 𝑉))(2^nd ‘𝑧) ↔ ⟨(1^st ‘𝑧), (2^nd ‘𝑧)⟩ ∈ (𝑉 ∘ (𝑀 ∘ 𝑉)))
95	93, 94	sylib 217	. . . . . . . . 9 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → ⟨(1^st ‘𝑧), (2^nd ‘𝑧)⟩ ∈ (𝑉 ∘ (𝑀 ∘ 𝑉)))
96	57, 95	eqeltrd 2834	. . . . . . . 8 ⊢ ((((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) ∧ 𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)}))) → 𝑧 ∈ (𝑉 ∘ (𝑀 ∘ 𝑉)))
97	96	ex 414	. . . . . . 7 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝑧 ∈ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) → 𝑧 ∈ (𝑉 ∘ (𝑀 ∘ 𝑉))))
98	97	ssrdv 3988	. . . . . 6 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ⊆ (𝑉 ∘ (𝑀 ∘ 𝑉)))
99		simp1 1137	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → 𝑈 ∈ (UnifOn‘𝑋))
100		simp2l 1200	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → 𝑉 ∈ 𝑈)
101		ustssxp 23701	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑉 ∈ 𝑈) → 𝑉 ⊆ (𝑋 × 𝑋))
102	99, 100, 101	syl2anc 585	. . . . . . . . . 10 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → 𝑉 ⊆ (𝑋 × 𝑋))
103		coss1 5854	. . . . . . . . . 10 ⊢ (𝑉 ⊆ (𝑋 × 𝑋) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ ((𝑋 × 𝑋) ∘ (𝑀 ∘ 𝑉)))
104	102, 103	syl 17	. . . . . . . . 9 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ ((𝑋 × 𝑋) ∘ (𝑀 ∘ 𝑉)))
105		coss1 5854	. . . . . . . . . . . 12 ⊢ (𝑀 ⊆ (𝑋 × 𝑋) → (𝑀 ∘ 𝑉) ⊆ ((𝑋 × 𝑋) ∘ 𝑉))
106	24, 105	syl 17	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑀 ∘ 𝑉) ⊆ ((𝑋 × 𝑋) ∘ 𝑉))
107		coss2 5855	. . . . . . . . . . . . 13 ⊢ (𝑉 ⊆ (𝑋 × 𝑋) → ((𝑋 × 𝑋) ∘ 𝑉) ⊆ ((𝑋 × 𝑋) ∘ (𝑋 × 𝑋)))
108		xpcoid 6287	. . . . . . . . . . . . 13 ⊢ ((𝑋 × 𝑋) ∘ (𝑋 × 𝑋)) = (𝑋 × 𝑋)
109	107, 108	sseqtrdi 4032	. . . . . . . . . . . 12 ⊢ (𝑉 ⊆ (𝑋 × 𝑋) → ((𝑋 × 𝑋) ∘ 𝑉) ⊆ (𝑋 × 𝑋))
110	102, 109	syl 17	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → ((𝑋 × 𝑋) ∘ 𝑉) ⊆ (𝑋 × 𝑋))
111	106, 110	sstrd 3992	. . . . . . . . . 10 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑀 ∘ 𝑉) ⊆ (𝑋 × 𝑋))
112		coss2 5855	. . . . . . . . . . 11 ⊢ ((𝑀 ∘ 𝑉) ⊆ (𝑋 × 𝑋) → ((𝑋 × 𝑋) ∘ (𝑀 ∘ 𝑉)) ⊆ ((𝑋 × 𝑋) ∘ (𝑋 × 𝑋)))
113	112, 108	sseqtrdi 4032	. . . . . . . . . 10 ⊢ ((𝑀 ∘ 𝑉) ⊆ (𝑋 × 𝑋) → ((𝑋 × 𝑋) ∘ (𝑀 ∘ 𝑉)) ⊆ (𝑋 × 𝑋))
114	111, 113	syl 17	. . . . . . . . 9 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → ((𝑋 × 𝑋) ∘ (𝑀 ∘ 𝑉)) ⊆ (𝑋 × 𝑋))
115	104, 114	sstrd 3992	. . . . . . . 8 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ (𝑋 × 𝑋))
116		utopbas 23732	. . . . . . . . . . . 12 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → 𝑋 = ∪ (unifTop‘𝑈))
117	1	unieqi 4921	. . . . . . . . . . . 12 ⊢ ∪ 𝐽 = ∪ (unifTop‘𝑈)
118	116, 117	eqtr4di 2791	. . . . . . . . . . 11 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → 𝑋 = ∪ 𝐽)
119	118	sqxpeqd 5708	. . . . . . . . . 10 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → (𝑋 × 𝑋) = (∪ 𝐽 × ∪ 𝐽))
120	34, 34	txuni 23088	. . . . . . . . . . 11 ⊢ ((𝐽 ∈ Top ∧ 𝐽 ∈ Top) → (∪ 𝐽 × ∪ 𝐽) = ∪ (𝐽 ×_t 𝐽))
121	3, 3, 120	syl2anc 585	. . . . . . . . . 10 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → (∪ 𝐽 × ∪ 𝐽) = ∪ (𝐽 ×_t 𝐽))
122	119, 121	eqtrd 2773	. . . . . . . . 9 ⊢ (𝑈 ∈ (UnifOn‘𝑋) → (𝑋 × 𝑋) = ∪ (𝐽 ×_t 𝐽))
123	122	3ad2ant1 1134	. . . . . . . 8 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑋 × 𝑋) = ∪ (𝐽 ×_t 𝐽))
124	115, 123	sseqtrd 4022	. . . . . . 7 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ ∪ (𝐽 ×_t 𝐽))
125	124	adantr 482	. . . . . 6 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ ∪ (𝐽 ×_t 𝐽))
126		eqid 2733	. . . . . . 7 ⊢ ∪ (𝐽 ×_t 𝐽) = ∪ (𝐽 ×_t 𝐽)
127	126	ssnei2 22612	. . . . . 6 ⊢ ((((𝐽 ×_t 𝐽) ∈ Top ∧ ((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟})) ∧ (((𝑉 “ {(1^st ‘𝑟)}) × (𝑉 “ {(2^nd ‘𝑟)})) ⊆ (𝑉 ∘ (𝑀 ∘ 𝑉)) ∧ (𝑉 ∘ (𝑀 ∘ 𝑉)) ⊆ ∪ (𝐽 ×_t 𝐽))) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}))
128	20, 53, 98, 125, 127	syl22anc 838	. . . . 5 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑟 ∈ 𝑀) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}))
129	128	ralrimiva 3147	. . . 4 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → ∀𝑟 ∈ 𝑀 (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}))
130	129	adantr 482	. . 3 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → ∀𝑟 ∈ 𝑀 (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟}))
131	6	adantr 482	. . . 4 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → (𝐽 ×_t 𝐽) ∈ Top)
132	24, 123	sseqtrd 4022	. . . . 5 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → 𝑀 ⊆ ∪ (𝐽 ×_t 𝐽))
133	132	adantr 482	. . . 4 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → 𝑀 ⊆ ∪ (𝐽 ×_t 𝐽))
134		simpr 486	. . . 4 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → 𝑀 ≠ ∅)
135	126	neips 22609	. . . 4 ⊢ (((𝐽 ×_t 𝐽) ∈ Top ∧ 𝑀 ⊆ ∪ (𝐽 ×_t 𝐽) ∧ 𝑀 ≠ ∅) → ((𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀) ↔ ∀𝑟 ∈ 𝑀 (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟})))
136	131, 133, 134, 135	syl3anc 1372	. . 3 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → ((𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀) ↔ ∀𝑟 ∈ 𝑀 (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘{𝑟})))
137	130, 136	mpbird 257	. 2 ⊢ (((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) ∧ 𝑀 ≠ ∅) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀))
138	19, 137	pm2.61dane 3030	1 ⊢ ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝑉 ∈ 𝑈 ∧ ^◡𝑉 = 𝑉) ∧ 𝑀 ⊆ (𝑋 × 𝑋)) → (𝑉 ∘ (𝑀 ∘ 𝑉)) ∈ ((nei‘(𝐽 ×_t 𝐽))‘𝑀))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 Vcvv 3475 ⊆ wss 3948 ∅c0 4322 {csn 4628 ⟨cop 4634 ∪ cuni 4908 class class class wbr 5148 × cxp 5674 ^◡ccnv 5675 “ cima 5679 ∘ ccom 5680 Rel wrel 5681 ‘cfv 6541 (class class class)co 7406 1^st c1st 7970 2^nd c2nd 7971 Topctop 22387 neicnei 22593 ×_t ctx 23056 UnifOncust 23696 unifTopcutop 23727

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7722

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-ov 7409 df-oprab 7410 df-mpo 7411 df-om 7853 df-1st 7972 df-2nd 7973 df-1o 8463 df-er 8700 df-en 8937 df-fin 8940 df-fi 9403 df-topgen 17386 df-top 22388 df-topon 22405 df-bases 22441 df-nei 22594 df-tx 23058 df-ust 23697 df-utop 23728

This theorem is referenced by: (None)

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