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Theorem neipcfilu 22379
Description: In an uniform space, a neighboring filter is a Cauchy filter base. (Contributed by Thierry Arnoux, 24-Jan-2018.)
Hypotheses
Ref Expression
neipcfilu.x 𝑋 = (Base‘𝑊)
neipcfilu.j 𝐽 = (TopOpen‘𝑊)
neipcfilu.u 𝑈 = (UnifSt‘𝑊)
Assertion
Ref Expression
neipcfilu ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((nei‘𝐽)‘{𝑃}) ∈ (CauFilu𝑈))

Proof of Theorem neipcfilu
Dummy variables 𝑣 𝑎 𝑤 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simp2 1167 . . . . 5 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → 𝑊 ∈ TopSp)
2 neipcfilu.x . . . . . 6 𝑋 = (Base‘𝑊)
3 neipcfilu.j . . . . . 6 𝐽 = (TopOpen‘𝑊)
42, 3istps 21018 . . . . 5 (𝑊 ∈ TopSp ↔ 𝐽 ∈ (TopOn‘𝑋))
51, 4sylib 209 . . . 4 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → 𝐽 ∈ (TopOn‘𝑋))
6 simp3 1168 . . . . 5 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → 𝑃𝑋)
76snssd 4494 . . . 4 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → {𝑃} ⊆ 𝑋)
8 snnzg 4462 . . . . 5 (𝑃𝑋 → {𝑃} ≠ ∅)
96, 8syl 17 . . . 4 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → {𝑃} ≠ ∅)
10 neifil 21963 . . . 4 ((𝐽 ∈ (TopOn‘𝑋) ∧ {𝑃} ⊆ 𝑋 ∧ {𝑃} ≠ ∅) → ((nei‘𝐽)‘{𝑃}) ∈ (Fil‘𝑋))
115, 7, 9, 10syl3anc 1490 . . 3 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((nei‘𝐽)‘{𝑃}) ∈ (Fil‘𝑋))
12 filfbas 21931 . . 3 (((nei‘𝐽)‘{𝑃}) ∈ (Fil‘𝑋) → ((nei‘𝐽)‘{𝑃}) ∈ (fBas‘𝑋))
1311, 12syl 17 . 2 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((nei‘𝐽)‘{𝑃}) ∈ (fBas‘𝑋))
14 eqid 2765 . . . . . . . . . 10 (𝑤 “ {𝑃}) = (𝑤 “ {𝑃})
15 imaeq1 5643 . . . . . . . . . . 11 (𝑣 = 𝑤 → (𝑣 “ {𝑃}) = (𝑤 “ {𝑃}))
1615rspceeqv 3479 . . . . . . . . . 10 ((𝑤𝑈 ∧ (𝑤 “ {𝑃}) = (𝑤 “ {𝑃})) → ∃𝑣𝑈 (𝑤 “ {𝑃}) = (𝑣 “ {𝑃}))
1714, 16mpan2 682 . . . . . . . . 9 (𝑤𝑈 → ∃𝑣𝑈 (𝑤 “ {𝑃}) = (𝑣 “ {𝑃}))
18 vex 3353 . . . . . . . . . . 11 𝑤 ∈ V
1918imaex 7302 . . . . . . . . . 10 (𝑤 “ {𝑃}) ∈ V
20 eqid 2765 . . . . . . . . . . 11 (𝑣𝑈 ↦ (𝑣 “ {𝑃})) = (𝑣𝑈 ↦ (𝑣 “ {𝑃}))
2120elrnmpt 5541 . . . . . . . . . 10 ((𝑤 “ {𝑃}) ∈ V → ((𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})) ↔ ∃𝑣𝑈 (𝑤 “ {𝑃}) = (𝑣 “ {𝑃})))
2219, 21ax-mp 5 . . . . . . . . 9 ((𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})) ↔ ∃𝑣𝑈 (𝑤 “ {𝑃}) = (𝑣 “ {𝑃}))
2317, 22sylibr 225 . . . . . . . 8 (𝑤𝑈 → (𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})))
2423ad2antlr 718 . . . . . . 7 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → (𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})))
25 neipcfilu.u . . . . . . . . . . . . 13 𝑈 = (UnifSt‘𝑊)
262, 25, 3isusp 22344 . . . . . . . . . . . 12 (𝑊 ∈ UnifSp ↔ (𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐽 = (unifTop‘𝑈)))
2726simplbi 491 . . . . . . . . . . 11 (𝑊 ∈ UnifSp → 𝑈 ∈ (UnifOn‘𝑋))
28273ad2ant1 1163 . . . . . . . . . 10 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → 𝑈 ∈ (UnifOn‘𝑋))
29 eqid 2765 . . . . . . . . . . 11 (unifTop‘𝑈) = (unifTop‘𝑈)
3029utopsnneip 22331 . . . . . . . . . 10 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋) → ((nei‘(unifTop‘𝑈))‘{𝑃}) = ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})))
3128, 6, 30syl2anc 579 . . . . . . . . 9 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((nei‘(unifTop‘𝑈))‘{𝑃}) = ran (𝑣𝑈 ↦ (𝑣 “ {𝑃})))
3231eleq2d 2830 . . . . . . . 8 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((𝑤 “ {𝑃}) ∈ ((nei‘(unifTop‘𝑈))‘{𝑃}) ↔ (𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃}))))
3332ad3antrrr 721 . . . . . . 7 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → ((𝑤 “ {𝑃}) ∈ ((nei‘(unifTop‘𝑈))‘{𝑃}) ↔ (𝑤 “ {𝑃}) ∈ ran (𝑣𝑈 ↦ (𝑣 “ {𝑃}))))
3424, 33mpbird 248 . . . . . 6 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → (𝑤 “ {𝑃}) ∈ ((nei‘(unifTop‘𝑈))‘{𝑃}))
35 simpl1 1242 . . . . . . . . . 10 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ (𝑣𝑈𝑤𝑈 ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)) → 𝑊 ∈ UnifSp)
36353anassrs 1469 . . . . . . . . 9 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → 𝑊 ∈ UnifSp)
3726simprbi 490 . . . . . . . . 9 (𝑊 ∈ UnifSp → 𝐽 = (unifTop‘𝑈))
3836, 37syl 17 . . . . . . . 8 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → 𝐽 = (unifTop‘𝑈))
3938fveq2d 6379 . . . . . . 7 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → (nei‘𝐽) = (nei‘(unifTop‘𝑈)))
4039fveq1d 6377 . . . . . 6 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → ((nei‘𝐽)‘{𝑃}) = ((nei‘(unifTop‘𝑈))‘{𝑃}))
4134, 40eleqtrrd 2847 . . . . 5 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → (𝑤 “ {𝑃}) ∈ ((nei‘𝐽)‘{𝑃}))
42 simpr 477 . . . . 5 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)
43 id 22 . . . . . . . 8 (𝑎 = (𝑤 “ {𝑃}) → 𝑎 = (𝑤 “ {𝑃}))
4443sqxpeqd 5309 . . . . . . 7 (𝑎 = (𝑤 “ {𝑃}) → (𝑎 × 𝑎) = ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})))
4544sseq1d 3792 . . . . . 6 (𝑎 = (𝑤 “ {𝑃}) → ((𝑎 × 𝑎) ⊆ 𝑣 ↔ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣))
4645rspcev 3461 . . . . 5 (((𝑤 “ {𝑃}) ∈ ((nei‘𝐽)‘{𝑃}) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → ∃𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)
4741, 42, 46syl2anc 579 . . . 4 (((((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) ∧ 𝑤𝑈) ∧ ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣) → ∃𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)
4828adantr 472 . . . . 5 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) → 𝑈 ∈ (UnifOn‘𝑋))
496adantr 472 . . . . 5 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) → 𝑃𝑋)
50 simpr 477 . . . . 5 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) → 𝑣𝑈)
51 simpll1 1269 . . . . . . . 8 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) → 𝑈 ∈ (UnifOn‘𝑋))
52 simplr 785 . . . . . . . 8 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) → 𝑢𝑈)
53 ustexsym 22298 . . . . . . . 8 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑢𝑈) → ∃𝑤𝑈 (𝑤 = 𝑤𝑤𝑢))
5451, 52, 53syl2anc 579 . . . . . . 7 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) → ∃𝑤𝑈 (𝑤 = 𝑤𝑤𝑢))
5551ad2antrr 717 . . . . . . . . . . . 12 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → 𝑈 ∈ (UnifOn‘𝑋))
56 simplr 785 . . . . . . . . . . . 12 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → 𝑤𝑈)
57 ustssxp 22287 . . . . . . . . . . . 12 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑤𝑈) → 𝑤 ⊆ (𝑋 × 𝑋))
5855, 56, 57syl2anc 579 . . . . . . . . . . 11 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → 𝑤 ⊆ (𝑋 × 𝑋))
59 simpll2 1271 . . . . . . . . . . . 12 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ ((𝑢𝑢) ⊆ 𝑣𝑤𝑈 ∧ (𝑤 = 𝑤𝑤𝑢))) → 𝑃𝑋)
60593anassrs 1469 . . . . . . . . . . 11 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → 𝑃𝑋)
61 ustneism 22306 . . . . . . . . . . 11 ((𝑤 ⊆ (𝑋 × 𝑋) ∧ 𝑃𝑋) → ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ (𝑤𝑤))
6258, 60, 61syl2anc 579 . . . . . . . . . 10 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ (𝑤𝑤))
63 simprl 787 . . . . . . . . . . . 12 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → 𝑤 = 𝑤)
6463coeq2d 5453 . . . . . . . . . . 11 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → (𝑤𝑤) = (𝑤𝑤))
65 coss1 5446 . . . . . . . . . . . . . 14 (𝑤𝑢 → (𝑤𝑤) ⊆ (𝑢𝑤))
66 coss2 5447 . . . . . . . . . . . . . 14 (𝑤𝑢 → (𝑢𝑤) ⊆ (𝑢𝑢))
6765, 66sstrd 3771 . . . . . . . . . . . . 13 (𝑤𝑢 → (𝑤𝑤) ⊆ (𝑢𝑢))
6867ad2antll 720 . . . . . . . . . . . 12 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → (𝑤𝑤) ⊆ (𝑢𝑢))
69 simpllr 793 . . . . . . . . . . . 12 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → (𝑢𝑢) ⊆ 𝑣)
7068, 69sstrd 3771 . . . . . . . . . . 11 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → (𝑤𝑤) ⊆ 𝑣)
7164, 70eqsstrd 3799 . . . . . . . . . 10 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → (𝑤𝑤) ⊆ 𝑣)
7262, 71sstrd 3771 . . . . . . . . 9 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) ∧ (𝑤 = 𝑤𝑤𝑢)) → ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)
7372ex 401 . . . . . . . 8 (((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) ∧ 𝑤𝑈) → ((𝑤 = 𝑤𝑤𝑢) → ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣))
7473reximdva 3163 . . . . . . 7 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) → (∃𝑤𝑈 (𝑤 = 𝑤𝑤𝑢) → ∃𝑤𝑈 ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣))
7554, 74mpd 15 . . . . . 6 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) ∧ 𝑢𝑈) ∧ (𝑢𝑢) ⊆ 𝑣) → ∃𝑤𝑈 ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)
76 ustexhalf 22293 . . . . . . 7 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑣𝑈) → ∃𝑢𝑈 (𝑢𝑢) ⊆ 𝑣)
77763adant2 1161 . . . . . 6 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) → ∃𝑢𝑈 (𝑢𝑢) ⊆ 𝑣)
7875, 77r19.29a 3225 . . . . 5 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑃𝑋𝑣𝑈) → ∃𝑤𝑈 ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)
7948, 49, 50, 78syl3anc 1490 . . . 4 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) → ∃𝑤𝑈 ((𝑤 “ {𝑃}) × (𝑤 “ {𝑃})) ⊆ 𝑣)
8047, 79r19.29a 3225 . . 3 (((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) ∧ 𝑣𝑈) → ∃𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)
8180ralrimiva 3113 . 2 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ∀𝑣𝑈𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)
82 iscfilu 22371 . . 3 (𝑈 ∈ (UnifOn‘𝑋) → (((nei‘𝐽)‘{𝑃}) ∈ (CauFilu𝑈) ↔ (((nei‘𝐽)‘{𝑃}) ∈ (fBas‘𝑋) ∧ ∀𝑣𝑈𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)))
8328, 82syl 17 . 2 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → (((nei‘𝐽)‘{𝑃}) ∈ (CauFilu𝑈) ↔ (((nei‘𝐽)‘{𝑃}) ∈ (fBas‘𝑋) ∧ ∀𝑣𝑈𝑎 ∈ ((nei‘𝐽)‘{𝑃})(𝑎 × 𝑎) ⊆ 𝑣)))
8413, 81, 83mpbir2and 704 1 ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝑃𝑋) → ((nei‘𝐽)‘{𝑃}) ∈ (CauFilu𝑈))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 197  wa 384  w3a 1107   = wceq 1652  wcel 2155  wne 2937  wral 3055  wrex 3056  Vcvv 3350  wss 3732  c0 4079  {csn 4334  cmpt 4888   × cxp 5275  ccnv 5276  ran crn 5278  cima 5280  ccom 5281  cfv 6068  Basecbs 16130  TopOpenctopn 16348  fBascfbas 20007  TopOnctopon 20994  TopSpctps 21016  neicnei 21181  Filcfil 21928  UnifOncust 22282  unifTopcutop 22313  UnifStcuss 22336  UnifSpcusp 22337  CauFiluccfilu 22369
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-nel 3041  df-ral 3060  df-rex 3061  df-reu 3062  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-om 7264  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-oadd 7768  df-er 7947  df-en 8161  df-fin 8164  df-fi 8524  df-fbas 20016  df-top 20978  df-topon 20995  df-topsp 21017  df-nei 21182  df-fil 21929  df-ust 22283  df-utop 22314  df-usp 22340  df-cfilu 22370
This theorem is referenced by:  ucnextcn  22387
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