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Theorem flimcf 17935
Description: Fineness is properly characterized by the property that every limit point of a filter in the finer topology is a limit point in the coarser topology. (Contributed by Jeff Hankins, 28-Sep-2009.) (Revised by Mario Carneiro, 23-Aug-2015.)
Assertion
Ref Expression
flimcf  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X )
)  ->  ( J  C_  K  <->  A. f  e.  ( Fil `  X ) ( K  fLim  f
)  C_  ( J  fLim  f ) ) )
Distinct variable groups:    f, J    f, K    f, X

Proof of Theorem flimcf
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simplll 735 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  J  e.  (TopOn `  X )
)
2 simprl 733 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  f  e.  ( Fil `  X
) )
3 simplr 732 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  J  C_  K )
4 flimss1 17926 . . . . . . 7  |-  ( ( J  e.  (TopOn `  X )  /\  f  e.  ( Fil `  X
)  /\  J  C_  K
)  ->  ( K  fLim  f )  C_  ( J  fLim  f ) )
51, 2, 3, 4syl3anc 1184 . . . . . 6  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  ( K  fLim  f )  C_  ( J  fLim  f ) )
6 simprr 734 . . . . . 6  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  x  e.  ( K  fLim  f
) )
75, 6sseldd 3292 . . . . 5  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  ( f  e.  ( Fil `  X )  /\  x  e.  ( K  fLim  f )
) )  ->  x  e.  ( J  fLim  f
) )
87expr 599 . . . 4  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  f  e.  ( Fil `  X ) )  -> 
( x  e.  ( K  fLim  f )  ->  x  e.  ( J 
fLim  f ) ) )
98ssrdv 3297 . . 3  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  J  C_  K )  /\  f  e.  ( Fil `  X ) )  -> 
( K  fLim  f
)  C_  ( J  fLim  f ) )
109ralrimiva 2732 . 2  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X )
)  /\  J  C_  K
)  ->  A. f  e.  ( Fil `  X
) ( K  fLim  f )  C_  ( J  fLim  f ) )
11 simpllr 736 . . . . . . . . . . . 12  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  K  e.  (TopOn `  X
) )
12 simplll 735 . . . . . . . . . . . . . . 15  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  J  e.  (TopOn `  X
) )
13 simprl 733 . . . . . . . . . . . . . . 15  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  x  e.  J )
14 toponss 16917 . . . . . . . . . . . . . . 15  |-  ( ( J  e.  (TopOn `  X )  /\  x  e.  J )  ->  x  C_  X )
1512, 13, 14syl2anc 643 . . . . . . . . . . . . . 14  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  x  C_  X )
16 simprr 734 . . . . . . . . . . . . . 14  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
y  e.  x )
1715, 16sseldd 3292 . . . . . . . . . . . . 13  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
y  e.  X )
1817snssd 3886 . . . . . . . . . . . 12  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  { y }  C_  X )
19 snnzg 3864 . . . . . . . . . . . . 13  |-  ( y  e.  X  ->  { y }  =/=  (/) )
2017, 19syl 16 . . . . . . . . . . . 12  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  { y }  =/=  (/) )
21 neifil 17833 . . . . . . . . . . . 12  |-  ( ( K  e.  (TopOn `  X )  /\  {
y }  C_  X  /\  { y }  =/=  (/) )  ->  ( ( nei `  K ) `  { y } )  e.  ( Fil `  X
) )
2211, 18, 20, 21syl3anc 1184 . . . . . . . . . . 11  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
( ( nei `  K
) `  { y } )  e.  ( Fil `  X ) )
23 simplr 732 . . . . . . . . . . 11  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  A. f  e.  ( Fil `  X ) ( K  fLim  f )  C_  ( J  fLim  f
) )
24 oveq2 6028 . . . . . . . . . . . . 13  |-  ( f  =  ( ( nei `  K ) `  {
y } )  -> 
( K  fLim  f
)  =  ( K 
fLim  ( ( nei `  K ) `  {
y } ) ) )
25 oveq2 6028 . . . . . . . . . . . . 13  |-  ( f  =  ( ( nei `  K ) `  {
y } )  -> 
( J  fLim  f
)  =  ( J 
fLim  ( ( nei `  K ) `  {
y } ) ) )
2624, 25sseq12d 3320 . . . . . . . . . . . 12  |-  ( f  =  ( ( nei `  K ) `  {
y } )  -> 
( ( K  fLim  f )  C_  ( J  fLim  f )  <->  ( K  fLim  ( ( nei `  K
) `  { y } ) )  C_  ( J  fLim  ( ( nei `  K ) `
 { y } ) ) ) )
2726rspcv 2991 . . . . . . . . . . 11  |-  ( ( ( nei `  K
) `  { y } )  e.  ( Fil `  X )  ->  ( A. f  e.  ( Fil `  X
) ( K  fLim  f )  C_  ( J  fLim  f )  ->  ( K  fLim  ( ( nei `  K ) `  {
y } ) ) 
C_  ( J  fLim  ( ( nei `  K
) `  { y } ) ) ) )
2822, 23, 27sylc 58 . . . . . . . . . 10  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
( K  fLim  (
( nei `  K
) `  { y } ) )  C_  ( J  fLim  ( ( nei `  K ) `
 { y } ) ) )
29 neiflim 17927 . . . . . . . . . . 11  |-  ( ( K  e.  (TopOn `  X )  /\  y  e.  X )  ->  y  e.  ( K  fLim  (
( nei `  K
) `  { y } ) ) )
3011, 17, 29syl2anc 643 . . . . . . . . . 10  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
y  e.  ( K 
fLim  ( ( nei `  K ) `  {
y } ) ) )
3128, 30sseldd 3292 . . . . . . . . 9  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
y  e.  ( J 
fLim  ( ( nei `  K ) `  {
y } ) ) )
32 flimneiss 17919 . . . . . . . . 9  |-  ( y  e.  ( J  fLim  ( ( nei `  K
) `  { y } ) )  -> 
( ( nei `  J
) `  { y } )  C_  (
( nei `  K
) `  { y } ) )
3331, 32syl 16 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  -> 
( ( nei `  J
) `  { y } )  C_  (
( nei `  K
) `  { y } ) )
34 topontop 16914 . . . . . . . . . 10  |-  ( J  e.  (TopOn `  X
)  ->  J  e.  Top )
3512, 34syl 16 . . . . . . . . 9  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  J  e.  Top )
36 opnneip 17106 . . . . . . . . 9  |-  ( ( J  e.  Top  /\  x  e.  J  /\  y  e.  x )  ->  x  e.  ( ( nei `  J ) `
 { y } ) )
3735, 13, 16, 36syl3anc 1184 . . . . . . . 8  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  x  e.  ( ( nei `  J ) `  { y } ) )
3833, 37sseldd 3292 . . . . . . 7  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  ( x  e.  J  /\  y  e.  x ) )  ->  x  e.  ( ( nei `  K ) `  { y } ) )
3938anassrs 630 . . . . . 6  |-  ( ( ( ( ( J  e.  (TopOn `  X
)  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X
) ( K  fLim  f )  C_  ( J  fLim  f ) )  /\  x  e.  J )  /\  y  e.  x
)  ->  x  e.  ( ( nei `  K
) `  { y } ) )
4039ralrimiva 2732 . . . . 5  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  x  e.  J )  ->  A. y  e.  x  x  e.  ( ( nei `  K
) `  { y } ) )
41 simpllr 736 . . . . . 6  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  x  e.  J )  ->  K  e.  (TopOn `  X )
)
42 topontop 16914 . . . . . 6  |-  ( K  e.  (TopOn `  X
)  ->  K  e.  Top )
43 opnnei 17107 . . . . . 6  |-  ( K  e.  Top  ->  (
x  e.  K  <->  A. y  e.  x  x  e.  ( ( nei `  K
) `  { y } ) ) )
4441, 42, 433syl 19 . . . . 5  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  x  e.  J )  ->  (
x  e.  K  <->  A. y  e.  x  x  e.  ( ( nei `  K
) `  { y } ) ) )
4540, 44mpbird 224 . . . 4  |-  ( ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X ) )  /\  A. f  e.  ( Fil `  X ) ( K 
fLim  f )  C_  ( J  fLim  f ) )  /\  x  e.  J )  ->  x  e.  K )
4645ex 424 . . 3  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X )
)  /\  A. f  e.  ( Fil `  X
) ( K  fLim  f )  C_  ( J  fLim  f ) )  -> 
( x  e.  J  ->  x  e.  K ) )
4746ssrdv 3297 . 2  |-  ( ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X )
)  /\  A. f  e.  ( Fil `  X
) ( K  fLim  f )  C_  ( J  fLim  f ) )  ->  J  C_  K )
4810, 47impbida 806 1  |-  ( ( J  e.  (TopOn `  X )  /\  K  e.  (TopOn `  X )
)  ->  ( J  C_  K  <->  A. f  e.  ( Fil `  X ) ( K  fLim  f
)  C_  ( J  fLim  f ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    = wceq 1649    e. wcel 1717    =/= wne 2550   A.wral 2649    C_ wss 3263   (/)c0 3571   {csn 3757   ` cfv 5394  (class class class)co 6020   Topctop 16881  TopOnctopon 16882   neicnei 17084   Filcfil 17798    fLim cflim 17887
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1661  ax-8 1682  ax-13 1719  ax-14 1721  ax-6 1736  ax-7 1741  ax-11 1753  ax-12 1939  ax-ext 2368  ax-rep 4261  ax-sep 4271  ax-nul 4279  ax-pow 4318  ax-pr 4344  ax-un 4641
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2242  df-mo 2243  df-clab 2374  df-cleq 2380  df-clel 2383  df-nfc 2512  df-ne 2552  df-nel 2553  df-ral 2654  df-rex 2655  df-reu 2656  df-rab 2658  df-v 2901  df-sbc 3105  df-csb 3195  df-dif 3266  df-un 3268  df-in 3270  df-ss 3277  df-nul 3572  df-if 3683  df-pw 3744  df-sn 3763  df-pr 3764  df-op 3766  df-uni 3958  df-iun 4037  df-br 4154  df-opab 4208  df-mpt 4209  df-id 4439  df-xp 4824  df-rel 4825  df-cnv 4826  df-co 4827  df-dm 4828  df-rn 4829  df-res 4830  df-ima 4831  df-iota 5358  df-fun 5396  df-fn 5397  df-f 5398  df-f1 5399  df-fo 5400  df-f1o 5401  df-fv 5402  df-ov 6023  df-oprab 6024  df-mpt2 6025  df-fbas 16623  df-top 16886  df-topon 16889  df-ntr 17007  df-nei 17085  df-fil 17799  df-flim 17892
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