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Theorem limccl 13422
Description: Closure of the limit operator. (Contributed by Mario Carneiro, 25-Dec-2016.)
Assertion
Ref Expression
limccl  |-  ( F lim
CC  B )  C_  CC

Proof of Theorem limccl
Dummy variables  d  e  f  x  y  z  w are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 id 19 . . . 4  |-  ( w  e.  ( F lim CC  B )  ->  w  e.  ( F lim CC  B
) )
2 df-limced 13419 . . . . . 6  |- lim CC  =  ( f  e.  ( CC  ^pm  CC ) ,  x  e.  CC  |->  { y  e.  CC  |  ( ( f : dom  f --> CC 
/\  dom  f  C_  CC )  /\  (
x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  f ( ( z #  x  /\  ( abs `  ( z  -  x ) )  < 
d )  ->  ( abs `  ( ( f `
 z )  -  y ) )  < 
e ) ) ) } )
32elmpocl1 6048 . . . . 5  |-  ( w  e.  ( F lim CC  B )  ->  F  e.  ( CC  ^pm  CC ) )
4 limcrcl 13421 . . . . . 6  |-  ( w  e.  ( F lim CC  B )  ->  ( F : dom  F --> CC  /\  dom  F  C_  CC  /\  B  e.  CC ) )
54simp3d 1006 . . . . 5  |-  ( w  e.  ( F lim CC  B )  ->  B  e.  CC )
6 cnex 7898 . . . . . . 7  |-  CC  e.  _V
76rabex 4133 . . . . . 6  |-  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) }  e.  _V
87a1i 9 . . . . 5  |-  ( w  e.  ( F lim CC  B )  ->  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) }  e.  _V )
9 simpl 108 . . . . . . . . . 10  |-  ( ( f  =  F  /\  x  =  B )  ->  f  =  F )
109dmeqd 4813 . . . . . . . . . 10  |-  ( ( f  =  F  /\  x  =  B )  ->  dom  f  =  dom  F )
119, 10feq12d 5337 . . . . . . . . 9  |-  ( ( f  =  F  /\  x  =  B )  ->  ( f : dom  f
--> CC  <->  F : dom  F --> CC ) )
1210sseq1d 3176 . . . . . . . . 9  |-  ( ( f  =  F  /\  x  =  B )  ->  ( dom  f  C_  CC 
<->  dom  F  C_  CC ) )
1311, 12anbi12d 470 . . . . . . . 8  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( f : dom  f --> CC  /\  dom  f  C_  CC )  <-> 
( F : dom  F --> CC  /\  dom  F  C_  CC ) ) )
14 simpr 109 . . . . . . . . . 10  |-  ( ( f  =  F  /\  x  =  B )  ->  x  =  B )
1514eleq1d 2239 . . . . . . . . 9  |-  ( ( f  =  F  /\  x  =  B )  ->  ( x  e.  CC  <->  B  e.  CC ) )
1614breq2d 4001 . . . . . . . . . . . . . 14  |-  ( ( f  =  F  /\  x  =  B )  ->  ( z #  x  <->  z #  B
) )
1714oveq2d 5869 . . . . . . . . . . . . . . . 16  |-  ( ( f  =  F  /\  x  =  B )  ->  ( z  -  x
)  =  ( z  -  B ) )
1817fveq2d 5500 . . . . . . . . . . . . . . 15  |-  ( ( f  =  F  /\  x  =  B )  ->  ( abs `  (
z  -  x ) )  =  ( abs `  ( z  -  B
) ) )
1918breq1d 3999 . . . . . . . . . . . . . 14  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( abs `  (
z  -  x ) )  <  d  <->  ( abs `  ( z  -  B
) )  <  d
) )
2016, 19anbi12d 470 . . . . . . . . . . . . 13  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( z #  x  /\  ( abs `  (
z  -  x ) )  <  d )  <-> 
( z #  B  /\  ( abs `  ( z  -  B ) )  <  d ) ) )
219fveq1d 5498 . . . . . . . . . . . . . . 15  |-  ( ( f  =  F  /\  x  =  B )  ->  ( f `  z
)  =  ( F `
 z ) )
2221fvoveq1d 5875 . . . . . . . . . . . . . 14  |-  ( ( f  =  F  /\  x  =  B )  ->  ( abs `  (
( f `  z
)  -  y ) )  =  ( abs `  ( ( F `  z )  -  y
) ) )
2322breq1d 3999 . . . . . . . . . . . . 13  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( abs `  (
( f `  z
)  -  y ) )  <  e  <->  ( abs `  ( ( F `  z )  -  y
) )  <  e
) )
2420, 23imbi12d 233 . . . . . . . . . . . 12  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( ( z #  x  /\  ( abs `  ( z  -  x
) )  <  d
)  ->  ( abs `  ( ( f `  z )  -  y
) )  <  e
)  <->  ( ( z #  B  /\  ( abs `  ( z  -  B
) )  <  d
)  ->  ( abs `  ( ( F `  z )  -  y
) )  <  e
) ) )
2510, 24raleqbidv 2677 . . . . . . . . . . 11  |-  ( ( f  =  F  /\  x  =  B )  ->  ( A. z  e. 
dom  f ( ( z #  x  /\  ( abs `  ( z  -  x ) )  < 
d )  ->  ( abs `  ( ( f `
 z )  -  y ) )  < 
e )  <->  A. z  e.  dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) )
2625rexbidv 2471 . . . . . . . . . 10  |-  ( ( f  =  F  /\  x  =  B )  ->  ( E. d  e.  RR+  A. z  e.  dom  f ( ( z #  x  /\  ( abs `  ( z  -  x
) )  <  d
)  ->  ( abs `  ( ( f `  z )  -  y
) )  <  e
)  <->  E. d  e.  RR+  A. z  e.  dom  F
( ( z #  B  /\  ( abs `  (
z  -  B ) )  <  d )  ->  ( abs `  (
( F `  z
)  -  y ) )  <  e ) ) )
2726ralbidv 2470 . . . . . . . . 9  |-  ( ( f  =  F  /\  x  =  B )  ->  ( A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  f
( ( z #  x  /\  ( abs `  (
z  -  x ) )  <  d )  ->  ( abs `  (
( f `  z
)  -  y ) )  <  e )  <->  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) )
2815, 27anbi12d 470 . . . . . . . 8  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  f ( ( z #  x  /\  ( abs `  ( z  -  x
) )  <  d
)  ->  ( abs `  ( ( f `  z )  -  y
) )  <  e
) )  <->  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  F ( ( z #  B  /\  ( abs `  (
z  -  B ) )  <  d )  ->  ( abs `  (
( F `  z
)  -  y ) )  <  e ) ) ) )
2913, 28anbi12d 470 . . . . . . 7  |-  ( ( f  =  F  /\  x  =  B )  ->  ( ( ( f : dom  f --> CC 
/\  dom  f  C_  CC )  /\  (
x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  f ( ( z #  x  /\  ( abs `  ( z  -  x ) )  < 
d )  ->  ( abs `  ( ( f `
 z )  -  y ) )  < 
e ) ) )  <-> 
( ( F : dom  F --> CC  /\  dom  F 
C_  CC )  /\  ( B  e.  CC  /\ 
A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) ) )
3029rabbidv 2719 . . . . . 6  |-  ( ( f  =  F  /\  x  =  B )  ->  { y  e.  CC  |  ( ( f : dom  f --> CC 
/\  dom  f  C_  CC )  /\  (
x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  f ( ( z #  x  /\  ( abs `  ( z  -  x ) )  < 
d )  ->  ( abs `  ( ( f `
 z )  -  y ) )  < 
e ) ) ) }  =  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) } )
3130, 2ovmpoga 5982 . . . . 5  |-  ( ( F  e.  ( CC 
^pm  CC )  /\  B  e.  CC  /\  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) }  e.  _V )  ->  ( F lim CC  B
)  =  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) } )
323, 5, 8, 31syl3anc 1233 . . . 4  |-  ( w  e.  ( F lim CC  B )  ->  ( F lim CC  B )  =  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\ 
A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) } )
331, 32eleqtrd 2249 . . 3  |-  ( w  e.  ( F lim CC  B )  ->  w  e.  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\ 
A. e  e.  RR+  E. d  e.  RR+  A. z  e.  dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) } )
34 elrabi 2883 . . 3  |-  ( w  e.  { y  e.  CC  |  ( ( F : dom  F --> CC  /\  dom  F  C_  CC )  /\  ( B  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. z  e. 
dom  F ( ( z #  B  /\  ( abs `  ( z  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 z )  -  y ) )  < 
e ) ) ) }  ->  w  e.  CC )
3533, 34syl 14 . 2  |-  ( w  e.  ( F lim CC  B )  ->  w  e.  CC )
3635ssriv 3151 1  |-  ( F lim
CC  B )  C_  CC
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    = wceq 1348    e. wcel 2141   A.wral 2448   E.wrex 2449   {crab 2452   _Vcvv 2730    C_ wss 3121   class class class wbr 3989   dom cdm 4611   -->wf 5194   ` cfv 5198  (class class class)co 5853    ^pm cpm 6627   CCcc 7772    < clt 7954    - cmin 8090   # cap 8500   RR+crp 9610   abscabs 10961   lim CC climc 13417
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-fv 5206  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pm 6629  df-limced 13419
This theorem is referenced by:  reldvg  13442  dvfvalap  13444  dvcl  13446
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