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Theorem flfelbas 23853
Description: A limit point of a function is in the topological space. (Contributed by Jeff Hankins, 10-Nov-2009.) (Revised by Stefan O'Rear, 7-Aug-2015.)
Assertion
Ref Expression
flfelbas (((𝐽 ∈ (TopOnβ€˜π‘‹) ∧ 𝐿 ∈ (Filβ€˜π‘Œ) ∧ 𝐹:π‘ŒβŸΆπ‘‹) ∧ 𝐴 ∈ ((𝐽 fLimf 𝐿)β€˜πΉ)) β†’ 𝐴 ∈ 𝑋)

Proof of Theorem flfelbas
Dummy variables π‘œ 𝑠 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 isflf 23852 . 2 ((𝐽 ∈ (TopOnβ€˜π‘‹) ∧ 𝐿 ∈ (Filβ€˜π‘Œ) ∧ 𝐹:π‘ŒβŸΆπ‘‹) β†’ (𝐴 ∈ ((𝐽 fLimf 𝐿)β€˜πΉ) ↔ (𝐴 ∈ 𝑋 ∧ βˆ€π‘œ ∈ 𝐽 (𝐴 ∈ π‘œ β†’ βˆƒπ‘  ∈ 𝐿 (𝐹 β€œ 𝑠) βŠ† π‘œ))))
21simprbda 498 1 (((𝐽 ∈ (TopOnβ€˜π‘‹) ∧ 𝐿 ∈ (Filβ€˜π‘Œ) ∧ 𝐹:π‘ŒβŸΆπ‘‹) ∧ 𝐴 ∈ ((𝐽 fLimf 𝐿)β€˜πΉ)) β†’ 𝐴 ∈ 𝑋)
Colors of variables: wff setvar class
Syntax hints:   β†’ wi 4   ∧ wa 395   ∧ w3a 1084   ∈ wcel 2098  βˆ€wral 3055  βˆƒwrex 3064   βŠ† wss 3943   β€œ cima 5672  βŸΆwf 6533  β€˜cfv 6537  (class class class)co 7405  TopOnctopon 22767  Filcfil 23704   fLimf cflf 23794
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 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2163  ax-ext 2697  ax-rep 5278  ax-sep 5292  ax-nul 5299  ax-pow 5356  ax-pr 5420  ax-un 7722
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2704  df-cleq 2718  df-clel 2804  df-nfc 2879  df-ne 2935  df-nel 3041  df-ral 3056  df-rex 3065  df-reu 3371  df-rab 3427  df-v 3470  df-sbc 3773  df-csb 3889  df-dif 3946  df-un 3948  df-in 3950  df-ss 3960  df-nul 4318  df-if 4524  df-pw 4599  df-sn 4624  df-pr 4626  df-op 4630  df-uni 4903  df-iun 4992  df-br 5142  df-opab 5204  df-mpt 5225  df-id 5567  df-xp 5675  df-rel 5676  df-cnv 5677  df-co 5678  df-dm 5679  df-rn 5680  df-res 5681  df-ima 5682  df-iota 6489  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-ov 7408  df-oprab 7409  df-mpo 7410  df-map 8824  df-fbas 21237  df-fg 21238  df-top 22751  df-topon 22768  df-ntr 22879  df-nei 22957  df-fil 23705  df-fm 23797  df-flim 23798  df-flf 23799
This theorem is referenced by:  cnextf  23925
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