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Theorem lmbr3 45703
Description: Express the binary relation "sequence 𝐹 converges to point 𝑃 " in a metric space using an arbitrary upper set of integers. (Contributed by Glauco Siliprandi, 5-Feb-2022.)
Hypotheses
Ref Expression
lmbr3.1 𝑘𝐹
lmbr3.2 (𝜑𝐽 ∈ (TopOn‘𝑋))
Assertion
Ref Expression
lmbr3 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
Distinct variable groups:   𝑗,𝐹,𝑢   𝑢,𝐽   𝑢,𝑃   𝑗,𝑘,𝑢
Allowed substitution hints:   𝜑(𝑢,𝑗,𝑘)   𝑃(𝑗,𝑘)   𝐹(𝑘)   𝐽(𝑗,𝑘)   𝑋(𝑢,𝑗,𝑘)

Proof of Theorem lmbr3
Dummy variables 𝑖 𝑙 𝑣 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 lmbr3.2 . . 3 (𝜑𝐽 ∈ (TopOn‘𝑋))
21lmbr3v 45701 . 2 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑣𝐽 (𝑃𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣)))))
3 eleq2w 2823 . . . . 5 (𝑣 = 𝑢 → (𝑃𝑣𝑃𝑢))
4 eleq2w 2823 . . . . . . . 8 (𝑣 = 𝑢 → ((𝐹𝑙) ∈ 𝑣 ↔ (𝐹𝑙) ∈ 𝑢))
54anbi2d 630 . . . . . . 7 (𝑣 = 𝑢 → ((𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣) ↔ (𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢)))
65rexralbidv 3221 . . . . . 6 (𝑣 = 𝑢 → (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣) ↔ ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢)))
7 fveq2 6907 . . . . . . . . 9 (𝑖 = 𝑗 → (ℤ𝑖) = (ℤ𝑗))
87raleqdv 3324 . . . . . . . 8 (𝑖 = 𝑗 → (∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢) ↔ ∀𝑙 ∈ (ℤ𝑗)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢)))
9 nfcv 2903 . . . . . . . . . . 11 𝑘𝑙
10 lmbr3.1 . . . . . . . . . . . 12 𝑘𝐹
1110nfdm 5965 . . . . . . . . . . 11 𝑘dom 𝐹
129, 11nfel 2918 . . . . . . . . . 10 𝑘 𝑙 ∈ dom 𝐹
1310, 9nffv 6917 . . . . . . . . . . 11 𝑘(𝐹𝑙)
14 nfcv 2903 . . . . . . . . . . 11 𝑘𝑢
1513, 14nfel 2918 . . . . . . . . . 10 𝑘(𝐹𝑙) ∈ 𝑢
1612, 15nfan 1897 . . . . . . . . 9 𝑘(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢)
17 nfv 1912 . . . . . . . . 9 𝑙(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)
18 eleq1w 2822 . . . . . . . . . 10 (𝑙 = 𝑘 → (𝑙 ∈ dom 𝐹𝑘 ∈ dom 𝐹))
19 fveq2 6907 . . . . . . . . . . 11 (𝑙 = 𝑘 → (𝐹𝑙) = (𝐹𝑘))
2019eleq1d 2824 . . . . . . . . . 10 (𝑙 = 𝑘 → ((𝐹𝑙) ∈ 𝑢 ↔ (𝐹𝑘) ∈ 𝑢))
2118, 20anbi12d 632 . . . . . . . . 9 (𝑙 = 𝑘 → ((𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢) ↔ (𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
2216, 17, 21cbvralw 3304 . . . . . . . 8 (∀𝑙 ∈ (ℤ𝑗)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢) ↔ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))
238, 22bitrdi 287 . . . . . . 7 (𝑖 = 𝑗 → (∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢) ↔ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
2423cbvrexvw 3236 . . . . . 6 (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))
256, 24bitrdi 287 . . . . 5 (𝑣 = 𝑢 → (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
263, 25imbi12d 344 . . . 4 (𝑣 = 𝑢 → ((𝑃𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣)) ↔ (𝑃𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))))
2726cbvralvw 3235 . . 3 (∀𝑣𝐽 (𝑃𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣)) ↔ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
28273anbi3i 1158 . 2 ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑣𝐽 (𝑃𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹𝑙) ∈ 𝑣))) ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))))
292, 28bitrdi 287 1 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  w3a 1086  wcel 2106  wnfc 2888  wral 3059  wrex 3068   class class class wbr 5148  dom cdm 5689  cfv 6563  (class class class)co 7431  pm cpm 8866  cc 11151  cz 12611  cuz 12876  TopOnctopon 22932  𝑡clm 23250
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pow 5371  ax-pr 5438  ax-un 7754  ax-cnex 11209  ax-resscn 11210  ax-1cn 11211  ax-addrcl 11214  ax-rnegex 11224  ax-cnre 11226  ax-pre-lttri 11227  ax-pre-lttrn 11228
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-nel 3045  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-sbc 3792  df-csb 3909  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-iun 4998  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-po 5597  df-so 5598  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-res 5701  df-ima 5702  df-iota 6516  df-fun 6565  df-fn 6566  df-f 6567  df-f1 6568  df-fo 6569  df-f1o 6570  df-fv 6571  df-ov 7434  df-oprab 7435  df-mpo 7436  df-1st 8013  df-2nd 8014  df-er 8744  df-pm 8868  df-en 8985  df-dom 8986  df-sdom 8987  df-pnf 11295  df-mnf 11296  df-xr 11297  df-ltxr 11298  df-le 11299  df-neg 11493  df-z 12612  df-uz 12877  df-top 22916  df-topon 22933  df-lm 23253
This theorem is referenced by:  xlimbr  45783  xlimmnfvlem1  45788  xlimmnfvlem2  45789  xlimpnfvlem1  45792  xlimpnfvlem2  45793
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