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Theorem lmmbr 23776
Description: Express the binary relation "sequence 𝐹 converges to point 𝑃 " in a metric space. Definition 1.4-1 of [Kreyszig] p. 25. The condition 𝐹 ⊆ (ℂ × 𝑋) allows us to use objects more general than sequences when convenient; see the comment in df-lm 21753. (Contributed by NM, 7-Dec-2006.) (Revised by Mario Carneiro, 1-May-2014.)
Hypotheses
Ref Expression
lmmbr.2 𝐽 = (MetOpen‘𝐷)
lmmbr.3 (𝜑𝐷 ∈ (∞Met‘𝑋))
Assertion
Ref Expression
lmmbr (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
Distinct variable groups:   𝑥,𝑦,𝐷   𝑥,𝐹,𝑦   𝑥,𝑃,𝑦   𝑥,𝑋,𝑦   𝑥,𝐽,𝑦   𝜑,𝑥
Allowed substitution hint:   𝜑(𝑦)

Proof of Theorem lmmbr
Dummy variable 𝑢 is distinct from all other variables.
StepHypRef Expression
1 lmmbr.3 . . . 4 (𝜑𝐷 ∈ (∞Met‘𝑋))
2 lmmbr.2 . . . . 5 𝐽 = (MetOpen‘𝐷)
32mopntopon 22964 . . . 4 (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ (TopOn‘𝑋))
41, 3syl 17 . . 3 (𝜑𝐽 ∈ (TopOn‘𝑋))
54lmbr 21782 . 2 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢))))
6 rpxr 12391 . . . . . . . . . . . 12 (𝑥 ∈ ℝ+𝑥 ∈ ℝ*)
72blopn 23025 . . . . . . . . . . . 12 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑥 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑥) ∈ 𝐽)
86, 7syl3an3 1159 . . . . . . . . . . 11 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑥 ∈ ℝ+) → (𝑃(ball‘𝐷)𝑥) ∈ 𝐽)
9 blcntr 22938 . . . . . . . . . . 11 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑥 ∈ ℝ+) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑥))
10 eleq2 2905 . . . . . . . . . . . . . 14 (𝑢 = (𝑃(ball‘𝐷)𝑥) → (𝑃𝑢𝑃 ∈ (𝑃(ball‘𝐷)𝑥)))
11 feq3 6493 . . . . . . . . . . . . . . 15 (𝑢 = (𝑃(ball‘𝐷)𝑥) → ((𝐹𝑦):𝑦𝑢 ↔ (𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
1211rexbidv 3301 . . . . . . . . . . . . . 14 (𝑢 = (𝑃(ball‘𝐷)𝑥) → (∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢 ↔ ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
1310, 12imbi12d 346 . . . . . . . . . . . . 13 (𝑢 = (𝑃(ball‘𝐷)𝑥) → ((𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) ↔ (𝑃 ∈ (𝑃(ball‘𝐷)𝑥) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
1413rspcva 3624 . . . . . . . . . . . 12 (((𝑃(ball‘𝐷)𝑥) ∈ 𝐽 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) → (𝑃 ∈ (𝑃(ball‘𝐷)𝑥) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
1514impancom 452 . . . . . . . . . . 11 (((𝑃(ball‘𝐷)𝑥) ∈ 𝐽𝑃 ∈ (𝑃(ball‘𝐷)𝑥)) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
168, 9, 15syl2anc 584 . . . . . . . . . 10 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑥 ∈ ℝ+) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
17163expa 1112 . . . . . . . . 9 (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋) ∧ 𝑥 ∈ ℝ+) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
1817adantlrl 716 . . . . . . . 8 (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) ∧ 𝑥 ∈ ℝ+) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
1918impancom 452 . . . . . . 7 (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) → (𝑥 ∈ ℝ+ → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
2019ralrimiv 3185 . . . . . 6 (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) → ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))
212mopni2 23018 . . . . . . . . . . 11 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑢𝐽𝑃𝑢) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢)
22 r19.29 3258 . . . . . . . . . . . 12 ((∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢) → ∃𝑥 ∈ ℝ+ (∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢))
23 fss 6523 . . . . . . . . . . . . . . . 16 (((𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢) → (𝐹𝑦):𝑦𝑢)
2423expcom 414 . . . . . . . . . . . . . . 15 ((𝑃(ball‘𝐷)𝑥) ⊆ 𝑢 → ((𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) → (𝐹𝑦):𝑦𝑢))
2524reximdv 3277 . . . . . . . . . . . . . 14 ((𝑃(ball‘𝐷)𝑥) ⊆ 𝑢 → (∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢))
2625impcom 408 . . . . . . . . . . . . 13 ((∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)
2726rexlimivw 3286 . . . . . . . . . . . 12 (∃𝑥 ∈ ℝ+ (∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)
2822, 27syl 17 . . . . . . . . . . 11 ((∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝑢) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)
2921, 28sylan2 592 . . . . . . . . . 10 ((∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) ∧ (𝐷 ∈ (∞Met‘𝑋) ∧ 𝑢𝐽𝑃𝑢)) → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)
30293exp2 1348 . . . . . . . . 9 (∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥) → (𝐷 ∈ (∞Met‘𝑋) → (𝑢𝐽 → (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢))))
3130impcom 408 . . . . . . . 8 ((𝐷 ∈ (∞Met‘𝑋) ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)) → (𝑢𝐽 → (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)))
3231adantlr 711 . . . . . . 7 (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)) → (𝑢𝐽 → (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)))
3332ralrimiv 3185 . . . . . 6 (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)) → ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢))
3420, 33impbida 797 . . . . 5 ((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋)) → (∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢) ↔ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
3534pm5.32da 579 . . . 4 (𝐷 ∈ (∞Met‘𝑋) → (((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
36 df-3an 1083 . . . 4 ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)))
37 df-3an 1083 . . . 4 ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)) ↔ ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋) ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥)))
3835, 36, 373bitr4g 315 . . 3 (𝐷 ∈ (∞Met‘𝑋) → ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
391, 38syl 17 . 2 (𝜑 → ((𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑢𝐽 (𝑃𝑢 → ∃𝑦 ∈ ran ℤ(𝐹𝑦):𝑦𝑢)) ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
405, 39bitrd 280 1 (𝜑 → (𝐹(⇝𝑡𝐽)𝑃 ↔ (𝐹 ∈ (𝑋pm ℂ) ∧ 𝑃𝑋 ∧ ∀𝑥 ∈ ℝ+𝑦 ∈ ran ℤ(𝐹𝑦):𝑦⟶(𝑃(ball‘𝐷)𝑥))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396  w3a 1081   = wceq 1530  wcel 2106  wral 3142  wrex 3143  wss 3939   class class class wbr 5062  ran crn 5554  cres 5555  wf 6347  cfv 6351  (class class class)co 7151  pm cpm 8400  cc 10527  *cxr 10666  cuz 12235  +crp 12382  ∞Metcxmet 20446  ballcbl 20448  MetOpencmopn 20451  TopOnctopon 21434  𝑡clm 21750
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2152  ax-12 2167  ax-ext 2796  ax-sep 5199  ax-nul 5206  ax-pow 5262  ax-pr 5325  ax-un 7454  ax-cnex 10585  ax-resscn 10586  ax-1cn 10587  ax-icn 10588  ax-addcl 10589  ax-addrcl 10590  ax-mulcl 10591  ax-mulrcl 10592  ax-mulcom 10593  ax-addass 10594  ax-mulass 10595  ax-distr 10596  ax-i2m1 10597  ax-1ne0 10598  ax-1rid 10599  ax-rnegex 10600  ax-rrecex 10601  ax-cnre 10602  ax-pre-lttri 10603  ax-pre-lttrn 10604  ax-pre-ltadd 10605  ax-pre-mulgt0 10606  ax-pre-sup 10607
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2615  df-eu 2649  df-clab 2803  df-cleq 2817  df-clel 2897  df-nfc 2967  df-ne 3021  df-nel 3128  df-ral 3147  df-rex 3148  df-reu 3149  df-rmo 3150  df-rab 3151  df-v 3501  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4470  df-pw 4543  df-sn 4564  df-pr 4566  df-tp 4568  df-op 4570  df-uni 4837  df-iun 4918  df-br 5063  df-opab 5125  df-mpt 5143  df-tr 5169  df-id 5458  df-eprel 5463  df-po 5472  df-so 5473  df-fr 5512  df-we 5514  df-xp 5559  df-rel 5560  df-cnv 5561  df-co 5562  df-dm 5563  df-rn 5564  df-res 5565  df-ima 5566  df-pred 6145  df-ord 6191  df-on 6192  df-lim 6193  df-suc 6194  df-iota 6311  df-fun 6353  df-fn 6354  df-f 6355  df-f1 6356  df-fo 6357  df-f1o 6358  df-fv 6359  df-riota 7109  df-ov 7154  df-oprab 7155  df-mpo 7156  df-om 7572  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-er 8282  df-map 8401  df-en 8502  df-dom 8503  df-sdom 8504  df-sup 8898  df-inf 8899  df-pnf 10669  df-mnf 10670  df-xr 10671  df-ltxr 10672  df-le 10673  df-sub 10864  df-neg 10865  df-div 11290  df-nn 11631  df-2 11692  df-n0 11890  df-z 11974  df-uz 12236  df-q 12341  df-rp 12383  df-xneg 12500  df-xadd 12501  df-xmul 12502  df-topgen 16709  df-psmet 20453  df-xmet 20454  df-bl 20456  df-mopn 20457  df-top 21418  df-topon 21435  df-bases 21470  df-lm 21753
This theorem is referenced by:  lmmbr2  23777  lmcau  23831
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