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Theorem neitr 21032
Description: The neighborhood of a trace is the trace of the neighborhood. (Contributed by Thierry Arnoux, 17-Jan-2018.)
Hypothesis
Ref Expression
neitr.1 𝑋 = 𝐽
Assertion
Ref Expression
neitr ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → ((nei‘(𝐽t 𝐴))‘𝐵) = (((nei‘𝐽)‘𝐵) ↾t 𝐴))

Proof of Theorem neitr
Dummy variables 𝑎 𝑏 𝑐 𝑑 𝑒 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nfv 1883 . . . . . 6 𝑑(𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴)
2 nfv 1883 . . . . . . 7 𝑑 𝑐 (𝐽t 𝐴)
3 nfre1 3034 . . . . . . 7 𝑑𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐)
42, 3nfan 1868 . . . . . 6 𝑑(𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))
51, 4nfan 1868 . . . . 5 𝑑((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐)))
6 simpl 472 . . . . . . 7 ((𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐)) → 𝑐 (𝐽t 𝐴))
76anim2i 592 . . . . . 6 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))) → ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)))
8 simp-5r 826 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑐 (𝐽t 𝐴))
9 simp1 1081 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐽 ∈ Top)
10 simp2 1082 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐴𝑋)
11 neitr.1 . . . . . . . . . . . . . 14 𝑋 = 𝐽
1211restuni 21014 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝐴𝑋) → 𝐴 = (𝐽t 𝐴))
139, 10, 12syl2anc 694 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐴 = (𝐽t 𝐴))
1413ad5antr 773 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐴 = (𝐽t 𝐴))
158, 14sseqtr4d 3675 . . . . . . . . . 10 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑐𝐴)
1610ad5antr 773 . . . . . . . . . 10 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐴𝑋)
1715, 16sstrd 3646 . . . . . . . . 9 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑐𝑋)
189ad5antr 773 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐽 ∈ Top)
19 simplr 807 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑒𝐽)
2011eltopss 20760 . . . . . . . . . . 11 ((𝐽 ∈ Top ∧ 𝑒𝐽) → 𝑒𝑋)
2118, 19, 20syl2anc 694 . . . . . . . . . 10 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑒𝑋)
2221ssdifssd 3781 . . . . . . . . 9 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → (𝑒𝐴) ⊆ 𝑋)
2317, 22unssd 3822 . . . . . . . 8 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → (𝑐 ∪ (𝑒𝐴)) ⊆ 𝑋)
24 simpr1l 1138 . . . . . . . . . . . 12 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ ((𝐵𝑑𝑑𝑐) ∧ 𝑒𝐽𝑑 = (𝑒𝐴))) → 𝐵𝑑)
25243anassrs 1313 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐵𝑑)
26 simpr 476 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑑 = (𝑒𝐴))
2725, 26sseqtrd 3674 . . . . . . . . . 10 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐵 ⊆ (𝑒𝐴))
28 inss1 3866 . . . . . . . . . 10 (𝑒𝐴) ⊆ 𝑒
2927, 28syl6ss 3648 . . . . . . . . 9 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝐵𝑒)
30 inundif 4079 . . . . . . . . . 10 ((𝑒𝐴) ∪ (𝑒𝐴)) = 𝑒
31 simpr1r 1139 . . . . . . . . . . . . 13 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ ((𝐵𝑑𝑑𝑐) ∧ 𝑒𝐽𝑑 = (𝑒𝐴))) → 𝑑𝑐)
32313anassrs 1313 . . . . . . . . . . . 12 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑑𝑐)
3326, 32eqsstr3d 3673 . . . . . . . . . . 11 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → (𝑒𝐴) ⊆ 𝑐)
34 unss1 3815 . . . . . . . . . . 11 ((𝑒𝐴) ⊆ 𝑐 → ((𝑒𝐴) ∪ (𝑒𝐴)) ⊆ (𝑐 ∪ (𝑒𝐴)))
3533, 34syl 17 . . . . . . . . . 10 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → ((𝑒𝐴) ∪ (𝑒𝐴)) ⊆ (𝑐 ∪ (𝑒𝐴)))
3630, 35syl5eqssr 3683 . . . . . . . . 9 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑒 ⊆ (𝑐 ∪ (𝑒𝐴)))
37 sseq2 3660 . . . . . . . . . . 11 (𝑏 = 𝑒 → (𝐵𝑏𝐵𝑒))
38 sseq1 3659 . . . . . . . . . . 11 (𝑏 = 𝑒 → (𝑏 ⊆ (𝑐 ∪ (𝑒𝐴)) ↔ 𝑒 ⊆ (𝑐 ∪ (𝑒𝐴))))
3937, 38anbi12d 747 . . . . . . . . . 10 (𝑏 = 𝑒 → ((𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴))) ↔ (𝐵𝑒𝑒 ⊆ (𝑐 ∪ (𝑒𝐴)))))
4039rspcev 3340 . . . . . . . . 9 ((𝑒𝐽 ∧ (𝐵𝑒𝑒 ⊆ (𝑐 ∪ (𝑒𝐴)))) → ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴))))
4119, 29, 36, 40syl12anc 1364 . . . . . . . 8 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴))))
42 indir 3908 . . . . . . . . . . 11 ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴) = ((𝑐𝐴) ∪ ((𝑒𝐴) ∩ 𝐴))
43 incom 3838 . . . . . . . . . . . . 13 (𝐴 ∩ (𝑒𝐴)) = ((𝑒𝐴) ∩ 𝐴)
44 disjdif 4073 . . . . . . . . . . . . 13 (𝐴 ∩ (𝑒𝐴)) = ∅
4543, 44eqtr3i 2675 . . . . . . . . . . . 12 ((𝑒𝐴) ∩ 𝐴) = ∅
4645uneq2i 3797 . . . . . . . . . . 11 ((𝑐𝐴) ∪ ((𝑒𝐴) ∩ 𝐴)) = ((𝑐𝐴) ∪ ∅)
47 un0 4000 . . . . . . . . . . 11 ((𝑐𝐴) ∪ ∅) = (𝑐𝐴)
4842, 46, 473eqtri 2677 . . . . . . . . . 10 ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴) = (𝑐𝐴)
49 df-ss 3621 . . . . . . . . . . 11 (𝑐𝐴 ↔ (𝑐𝐴) = 𝑐)
5049biimpi 206 . . . . . . . . . 10 (𝑐𝐴 → (𝑐𝐴) = 𝑐)
5148, 50syl5req 2698 . . . . . . . . 9 (𝑐𝐴𝑐 = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴))
5215, 51syl 17 . . . . . . . 8 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → 𝑐 = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴))
53 vex 3234 . . . . . . . . . 10 𝑐 ∈ V
54 vex 3234 . . . . . . . . . . 11 𝑒 ∈ V
55 difexg 4841 . . . . . . . . . . 11 (𝑒 ∈ V → (𝑒𝐴) ∈ V)
5654, 55ax-mp 5 . . . . . . . . . 10 (𝑒𝐴) ∈ V
5753, 56unex 6998 . . . . . . . . 9 (𝑐 ∪ (𝑒𝐴)) ∈ V
58 sseq1 3659 . . . . . . . . . . 11 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (𝑎𝑋 ↔ (𝑐 ∪ (𝑒𝐴)) ⊆ 𝑋))
59 sseq2 3660 . . . . . . . . . . . . 13 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (𝑏𝑎𝑏 ⊆ (𝑐 ∪ (𝑒𝐴))))
6059anbi2d 740 . . . . . . . . . . . 12 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → ((𝐵𝑏𝑏𝑎) ↔ (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴)))))
6160rexbidv 3081 . . . . . . . . . . 11 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (∃𝑏𝐽 (𝐵𝑏𝑏𝑎) ↔ ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴)))))
6258, 61anbi12d 747 . . . . . . . . . 10 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → ((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ↔ ((𝑐 ∪ (𝑒𝐴)) ⊆ 𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴))))))
63 ineq1 3840 . . . . . . . . . . 11 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (𝑎𝐴) = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴))
6463eqeq2d 2661 . . . . . . . . . 10 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (𝑐 = (𝑎𝐴) ↔ 𝑐 = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴)))
6562, 64anbi12d 747 . . . . . . . . 9 (𝑎 = (𝑐 ∪ (𝑒𝐴)) → (((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)) ↔ (((𝑐 ∪ (𝑒𝐴)) ⊆ 𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴)))) ∧ 𝑐 = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴))))
6657, 65spcev 3331 . . . . . . . 8 ((((𝑐 ∪ (𝑒𝐴)) ⊆ 𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏 ⊆ (𝑐 ∪ (𝑒𝐴)))) ∧ 𝑐 = ((𝑐 ∪ (𝑒𝐴)) ∩ 𝐴)) → ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)))
6723, 41, 52, 66syl21anc 1365 . . . . . . 7 (((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) ∧ 𝑒𝐽) ∧ 𝑑 = (𝑒𝐴)) → ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)))
689ad3antrrr 766 . . . . . . . 8 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → 𝐽 ∈ Top)
69 uniexg 6997 . . . . . . . . . . . 12 (𝐽 ∈ Top → 𝐽 ∈ V)
709, 69syl 17 . . . . . . . . . . 11 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐽 ∈ V)
7111, 70syl5eqel 2734 . . . . . . . . . 10 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝑋 ∈ V)
7271, 10ssexd 4838 . . . . . . . . 9 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐴 ∈ V)
7372ad3antrrr 766 . . . . . . . 8 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → 𝐴 ∈ V)
74 simplr 807 . . . . . . . 8 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → 𝑑 ∈ (𝐽t 𝐴))
75 elrest 16135 . . . . . . . . 9 ((𝐽 ∈ Top ∧ 𝐴 ∈ V) → (𝑑 ∈ (𝐽t 𝐴) ↔ ∃𝑒𝐽 𝑑 = (𝑒𝐴)))
7675biimpa 500 . . . . . . . 8 (((𝐽 ∈ Top ∧ 𝐴 ∈ V) ∧ 𝑑 ∈ (𝐽t 𝐴)) → ∃𝑒𝐽 𝑑 = (𝑒𝐴))
7768, 73, 74, 76syl21anc 1365 . . . . . . 7 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → ∃𝑒𝐽 𝑑 = (𝑒𝐴))
7867, 77r19.29a 3107 . . . . . 6 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 (𝐽t 𝐴)) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)))
797, 78sylanl1 683 . . . . 5 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))) ∧ 𝑑 ∈ (𝐽t 𝐴)) ∧ (𝐵𝑑𝑑𝑐)) → ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)))
80 simprr 811 . . . . 5 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))) → ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))
815, 79, 80r19.29af 3105 . . . 4 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))) → ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)))
82 inss2 3867 . . . . . . . . . 10 (𝑎𝐴) ⊆ 𝐴
83 sseq1 3659 . . . . . . . . . 10 (𝑐 = (𝑎𝐴) → (𝑐𝐴 ↔ (𝑎𝐴) ⊆ 𝐴))
8482, 83mpbiri 248 . . . . . . . . 9 (𝑐 = (𝑎𝐴) → 𝑐𝐴)
8584adantl 481 . . . . . . . 8 (((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)) → 𝑐𝐴)
8685exlimiv 1898 . . . . . . 7 (∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)) → 𝑐𝐴)
8786adantl 481 . . . . . 6 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → 𝑐𝐴)
8813adantr 480 . . . . . 6 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → 𝐴 = (𝐽t 𝐴))
8987, 88sseqtrd 3674 . . . . 5 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → 𝑐 (𝐽t 𝐴))
909ad4antr 769 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝐽 ∈ Top)
9172ad4antr 769 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝐴 ∈ V)
92 simplr 807 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝑏𝐽)
93 elrestr 16136 . . . . . . . . . . . . . . 15 ((𝐽 ∈ Top ∧ 𝐴 ∈ V ∧ 𝑏𝐽) → (𝑏𝐴) ∈ (𝐽t 𝐴))
9490, 91, 92, 93syl3anc 1366 . . . . . . . . . . . . . 14 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → (𝑏𝐴) ∈ (𝐽t 𝐴))
95 simprl 809 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝐵𝑏)
96 simp3 1083 . . . . . . . . . . . . . . . 16 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐵𝐴)
9796ad4antr 769 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝐵𝐴)
9895, 97ssind 3870 . . . . . . . . . . . . . 14 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝐵 ⊆ (𝑏𝐴))
99 simprr 811 . . . . . . . . . . . . . . . 16 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝑏𝑎)
100 ssrin 3871 . . . . . . . . . . . . . . . 16 (𝑏𝑎 → (𝑏𝐴) ⊆ (𝑎𝐴))
10199, 100syl 17 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → (𝑏𝐴) ⊆ (𝑎𝐴))
102 simp-4r 824 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → 𝑐 = (𝑎𝐴))
103101, 102sseqtr4d 3675 . . . . . . . . . . . . . 14 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → (𝑏𝐴) ⊆ 𝑐)
10494, 98, 103jca32 557 . . . . . . . . . . . . 13 ((((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) ∧ (𝐵𝑏𝑏𝑎)) → ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)))
105104ex 449 . . . . . . . . . . . 12 (((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) ∧ 𝑏𝐽) → ((𝐵𝑏𝑏𝑎) → ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐))))
106105reximdva 3046 . . . . . . . . . . 11 ((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ 𝑎𝑋) → (∃𝑏𝐽 (𝐵𝑏𝑏𝑎) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐))))
107106impr 648 . . . . . . . . . 10 ((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ 𝑐 = (𝑎𝐴)) ∧ (𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎))) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)))
108107an32s 863 . . . . . . . . 9 ((((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ (𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎))) ∧ 𝑐 = (𝑎𝐴)) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)))
109108expl 647 . . . . . . . 8 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐))))
110109exlimdv 1901 . . . . . . 7 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴)) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐))))
111110imp 444 . . . . . 6 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → ∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)))
112 sseq2 3660 . . . . . . . . 9 (𝑑 = (𝑏𝐴) → (𝐵𝑑𝐵 ⊆ (𝑏𝐴)))
113 sseq1 3659 . . . . . . . . 9 (𝑑 = (𝑏𝐴) → (𝑑𝑐 ↔ (𝑏𝐴) ⊆ 𝑐))
114112, 113anbi12d 747 . . . . . . . 8 (𝑑 = (𝑏𝐴) → ((𝐵𝑑𝑑𝑐) ↔ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)))
115114rspcev 3340 . . . . . . 7 (((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)) → ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))
116115rexlimivw 3058 . . . . . 6 (∃𝑏𝐽 ((𝑏𝐴) ∈ (𝐽t 𝐴) ∧ (𝐵 ⊆ (𝑏𝐴) ∧ (𝑏𝐴) ⊆ 𝑐)) → ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))
117111, 116syl 17 . . . . 5 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))
11889, 117jca 553 . . . 4 (((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) ∧ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))) → (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐)))
11981, 118impbida 895 . . 3 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → ((𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐)) ↔ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
120 resttop 21012 . . . . 5 ((𝐽 ∈ Top ∧ 𝐴 ∈ V) → (𝐽t 𝐴) ∈ Top)
1219, 72, 120syl2anc 694 . . . 4 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝐽t 𝐴) ∈ Top)
12296, 13sseqtrd 3674 . . . 4 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐵 (𝐽t 𝐴))
123 eqid 2651 . . . . 5 (𝐽t 𝐴) = (𝐽t 𝐴)
124123isnei 20955 . . . 4 (((𝐽t 𝐴) ∈ Top ∧ 𝐵 (𝐽t 𝐴)) → (𝑐 ∈ ((nei‘(𝐽t 𝐴))‘𝐵) ↔ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))))
125121, 122, 124syl2anc 694 . . 3 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝑐 ∈ ((nei‘(𝐽t 𝐴))‘𝐵) ↔ (𝑐 (𝐽t 𝐴) ∧ ∃𝑑 ∈ (𝐽t 𝐴)(𝐵𝑑𝑑𝑐))))
126 fvex 6239 . . . . . 6 ((nei‘𝐽)‘𝐵) ∈ V
127 restval 16134 . . . . . 6 ((((nei‘𝐽)‘𝐵) ∈ V ∧ 𝐴 ∈ V) → (((nei‘𝐽)‘𝐵) ↾t 𝐴) = ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)))
128126, 72, 127sylancr 696 . . . . 5 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (((nei‘𝐽)‘𝐵) ↾t 𝐴) = ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)))
129128eleq2d 2716 . . . 4 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝑐 ∈ (((nei‘𝐽)‘𝐵) ↾t 𝐴) ↔ 𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴))))
13096, 10sstrd 3646 . . . . 5 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → 𝐵𝑋)
131 eqid 2651 . . . . . . . . 9 (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) = (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴))
132131elrnmpt 5404 . . . . . . . 8 (𝑐 ∈ V → (𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) ↔ ∃𝑎 ∈ ((nei‘𝐽)‘𝐵)𝑐 = (𝑎𝐴)))
13353, 132ax-mp 5 . . . . . . 7 (𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) ↔ ∃𝑎 ∈ ((nei‘𝐽)‘𝐵)𝑐 = (𝑎𝐴))
134 df-rex 2947 . . . . . . 7 (∃𝑎 ∈ ((nei‘𝐽)‘𝐵)𝑐 = (𝑎𝐴) ↔ ∃𝑎(𝑎 ∈ ((nei‘𝐽)‘𝐵) ∧ 𝑐 = (𝑎𝐴)))
135133, 134bitri 264 . . . . . 6 (𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) ↔ ∃𝑎(𝑎 ∈ ((nei‘𝐽)‘𝐵) ∧ 𝑐 = (𝑎𝐴)))
13611isnei 20955 . . . . . . . 8 ((𝐽 ∈ Top ∧ 𝐵𝑋) → (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↔ (𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎))))
137136anbi1d 741 . . . . . . 7 ((𝐽 ∈ Top ∧ 𝐵𝑋) → ((𝑎 ∈ ((nei‘𝐽)‘𝐵) ∧ 𝑐 = (𝑎𝐴)) ↔ ((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
138137exbidv 1890 . . . . . 6 ((𝐽 ∈ Top ∧ 𝐵𝑋) → (∃𝑎(𝑎 ∈ ((nei‘𝐽)‘𝐵) ∧ 𝑐 = (𝑎𝐴)) ↔ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
139135, 138syl5bb 272 . . . . 5 ((𝐽 ∈ Top ∧ 𝐵𝑋) → (𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) ↔ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
1409, 130, 139syl2anc 694 . . . 4 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝑐 ∈ ran (𝑎 ∈ ((nei‘𝐽)‘𝐵) ↦ (𝑎𝐴)) ↔ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
141129, 140bitrd 268 . . 3 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝑐 ∈ (((nei‘𝐽)‘𝐵) ↾t 𝐴) ↔ ∃𝑎((𝑎𝑋 ∧ ∃𝑏𝐽 (𝐵𝑏𝑏𝑎)) ∧ 𝑐 = (𝑎𝐴))))
142119, 125, 1413bitr4d 300 . 2 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → (𝑐 ∈ ((nei‘(𝐽t 𝐴))‘𝐵) ↔ 𝑐 ∈ (((nei‘𝐽)‘𝐵) ↾t 𝐴)))
143142eqrdv 2649 1 ((𝐽 ∈ Top ∧ 𝐴𝑋𝐵𝐴) → ((nei‘(𝐽t 𝐴))‘𝐵) = (((nei‘𝐽)‘𝐵) ↾t 𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  w3a 1054   = wceq 1523  wex 1744  wcel 2030  wrex 2942  Vcvv 3231  cdif 3604  cun 3605  cin 3606  wss 3607  c0 3948   cuni 4468  cmpt 4762  ran crn 5144  cfv 5926  (class class class)co 6690  t crest 16128  Topctop 20746  neicnei 20949
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-oadd 7609  df-er 7787  df-en 7998  df-fin 8001  df-fi 8358  df-rest 16130  df-topgen 16151  df-top 20747  df-topon 20764  df-bases 20798  df-nei 20950
This theorem is referenced by:  flfcntr  21894  cnextfres1  21919
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