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Theorem hausflf2 24138
Description: If a convergent function has its values in a Hausdorff space, then it has a unique limit. (Contributed by FL, 14-Nov-2010.) (Revised by Stefan O'Rear, 6-Aug-2015.)
Hypothesis
Ref Expression
hausflf.x 𝑋 = 𝐽
Assertion
Ref Expression
hausflf2 (((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌𝑋) ∧ ((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o)

Proof of Theorem hausflf2
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 n0 4315 . . 3 (((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹))
21biimpi 219 . 2 (((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅ → ∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹))
3 hausflf.x . . 3 𝑋 = 𝐽
43hausflf 24137 . 2 ((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌𝑋) → ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹))
5 euen1b 9028 . . 3 (((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o ↔ ∃!𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹))
6 df-eu 2604 . . 3 (∃!𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ↔ (∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ∧ ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)))
75, 6sylbbr 239 . 2 ((∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ∧ ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o)
82, 4, 7syl2anr 608 1 (((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌𝑋) ∧ ((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400  w3a 1101   = wceq 1568  wex 1807  wcel 2150  ∃*wmo 2572  ∃!weu 2603  wne 2965  c0 4294   cuni 4877   class class class wbr 5114  wf 6536  cfv 6540  (class class class)co 7414  1oc1o 8449  cen 8943  Hauscha 23448  Filcfil 23985   fLimf cflf 24075
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2152  ax-9 2160  ax-10 2183  ax-11 2199  ax-12 2220  ax-ext 2742  ax-rep 5243  ax-sep 5262  ax-nul 5274  ax-pow 5340  ax-pr 5408  ax-un 7736
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2099  df-mo 2574  df-eu 2604  df-clab 2749  df-cleq 2762  df-clel 2845  df-nfc 2919  df-ne 2966  df-nel 3072  df-ral 3087  df-rex 3097  df-reu 3377  df-rab 3424  df-v 3464  df-sbc 3753  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-iun 4963  df-br 5115  df-opab 5179  df-mpt 5198  df-id 5560  df-xp 5671  df-rel 5672  df-cnv 5673  df-co 5674  df-dm 5675  df-rn 5676  df-res 5677  df-ima 5678  df-suc 6370  df-iota 6496  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-ov 7417  df-oprab 7418  df-mpo 7419  df-1o 8456  df-map 8829  df-en 8947  df-fbas 21502  df-top 23034  df-topon 23051  df-nei 23238  df-haus 23455  df-fil 23986  df-flim 24079  df-flf 24080
This theorem is referenced by:  cnextfvval  24205  cnextcn  24207  cnextfres1  24208
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