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Theorem lmbr2 15317
Description: Express the binary relation "sequence 𝐹 converges to point 𝑃 " in a metric space using an arbitrary upper set of integers. (Contributed by Mario Carneiro, 14-Nov-2013.)
Hypotheses
Ref Expression
lmbr.2 (𝜑𝐽 ∈ (TopOn‘𝑋))
lmbr2.4 𝑍 = (ℤ𝑀)
lmbr2.5 (𝜑𝑀 ∈ ℤ)
Assertion
Ref Expression
lmbr2 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
Distinct variable groups:   𝑗,𝑘,𝑢,𝐹   𝑗,𝐽,𝑘,𝑢   𝜑,𝑗,𝑘,𝑢   𝑗,𝑍,𝑘,𝑢   𝑗,𝑀   𝑃,𝑗,𝑘,𝑢   𝑗,𝑋,𝑘,𝑢
Allowed substitution hints:   𝑀(𝑢, 𝑘)

Proof of Theorem lmbr2
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 lmbr.2 . . 3 (𝜑𝐽 ∈ (TopOn‘𝑋))
21lmbr 15316 . 2 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢))))
3 uzf 9926 . . . . . . . 8 :ℤ⟶𝒫 ℤ
4 ffn 5533 . . . . . . . 8 (ℤ:ℤ⟶𝒫 ℤ → ℤ Fn ℤ)
5 reseq2 5058 . . . . . . . . . 10 (𝑧 = (ℤ𝑗) → (𝐹𝑧) = (𝐹 ↾ (ℤ𝑗)))
6 id 19 . . . . . . . . . 10 (𝑧 = (ℤ𝑗) → 𝑧 = (ℤ𝑗))
75, 6feq12d 5523 . . . . . . . . 9 (𝑧 = (ℤ𝑗) → ((𝐹𝑧):𝑧𝑢 ↔ (𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢))
87rexrn 5845 . . . . . . . 8 (ℤ Fn ℤ → (∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢 ↔ ∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢))
93, 4, 8mp2b 8 . . . . . . 7 (∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢 ↔ ∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢)
10 pmfun 6942 . . . . . . . . . . 11 (𝐹 ∈ (𝑋pm ℂ) → Fun 𝐹)
1110ad2antrl 494 . . . . . . . . . 10 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → Fun 𝐹)
12 ffvresb 5871 . . . . . . . . . 10 (Fun 𝐹 → ((𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢 ↔ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
1311, 12syl 14 . . . . . . . . 9 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → ((𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢 ↔ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
1413rexbidv 2551 . . . . . . . 8 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢 ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
15 lmbr2.5 . . . . . . . . . 10 (𝜑𝑀 ∈ ℤ)
1615adantr 276 . . . . . . . . 9 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → 𝑀 ∈ ℤ)
17 lmbr2.4 . . . . . . . . . 10 𝑍 = (ℤ𝑀)
1817rexuz3 11758 . . . . . . . . 9 (𝑀 ∈ ℤ → (∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
1916, 18syl 14 . . . . . . . 8 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
2014, 19bitr4d 191 . . . . . . 7 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ𝑗)):(ℤ𝑗)⟶𝑢 ↔ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
219, 20bitrid 192 . . . . . 6 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢 ↔ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))
2221imbi2d 230 . . . . 5 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → ((𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢) ↔ (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))))
2322ralbidv 2550 . . . 4 ((𝜑 ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢) ↔ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))))
2423pm5.32da 456 . . 3 (𝜑 → (((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢)) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
25 df-3an 1011 . . 3 ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢)) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢)))
26 df-3an 1011 . . 3 ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢))))
2724, 25, 263bitr4g 223 . 2 (𝜑 → ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑧 ∈ ran ℤ(𝐹𝑧):𝑧𝑢)) ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
282, 27bitrd 188 1 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹𝑘) ∈ 𝑢)))))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wa 104  wb 105  w3a 1009   = wceq 1402  wcel 2209  wral 2528  wrex 2529  𝒫 cpw 3688   class class class wbr 4130  dom cdm 4774  ran crn 4775  cres 4776  Fun wfun 5371   Fn wfn 5372  wf 5373  cfv 5377  (class class class)co 6085  pm cpm 6923  cc 8177  cz 9646  cuz 9923  TopOnctopon 15113  𝑡clm 15290
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-distr 8283  ax-i2m1 8284  ax-0lt1 8285  ax-0id 8287  ax-rnegex 8288  ax-cnre 8290  ax-pre-ltirr 8291  ax-pre-ltwlin 8292  ax-pre-lttrn 8293  ax-pre-apti 8294  ax-pre-ltadd 8295
This proof depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-if 3639  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-1st 6374  df-2nd 6375  df-pm 6925  df-pnf 8362  df-mnf 8363  df-xr 8364  df-ltxr 8365  df-le 8366  df-sub 8499  df-neg 8500  df-inn 9306  df-n0 9566  df-z 9647  df-uz 9924  df-top 15101  df-topon 15114  df-lm 15293
This theorem is used by:  lmbrf  15318  lmcvg  15320  lmres  15351  lmtopcnp  15353
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