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Theorem limcresi 13429
Description: Any limit of  F is also a limit of the restriction of  F. (Contributed by Mario Carneiro, 28-Dec-2016.)
Assertion
Ref Expression
limcresi  |-  ( F lim
CC  B )  C_  ( ( F  |`  C ) lim CC  B )

Proof of Theorem limcresi
Dummy variables  d  e  u  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 limcrcl 13421 . . . . . . 7  |-  ( x  e.  ( F lim CC  B )  ->  ( F : dom  F --> CC  /\  dom  F  C_  CC  /\  B  e.  CC ) )
21simp1d 1004 . . . . . 6  |-  ( x  e.  ( F lim CC  B )  ->  F : dom  F --> CC )
31simp2d 1005 . . . . . 6  |-  ( x  e.  ( F lim CC  B )  ->  dom  F 
C_  CC )
41simp3d 1006 . . . . . 6  |-  ( x  e.  ( F lim CC  B )  ->  B  e.  CC )
52, 3, 4ellimc3ap 13424 . . . . 5  |-  ( x  e.  ( F lim CC  B )  ->  (
x  e.  ( F lim
CC  B )  <->  ( x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. u  e.  dom  F ( ( u #  B  /\  ( abs `  (
u  -  B ) )  <  d )  ->  ( abs `  (
( F `  u
)  -  x ) )  <  e ) ) ) )
65ibi 175 . . . 4  |-  ( x  e.  ( F lim CC  B )  ->  (
x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. u  e. 
dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e ) ) )
7 inss1 3347 . . . . . . . . 9  |-  ( dom 
F  i^i  C )  C_ 
dom  F
8 ssralv 3211 . . . . . . . . 9  |-  ( ( dom  F  i^i  C
)  C_  dom  F  -> 
( A. u  e. 
dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e )  ->  A. u  e.  ( dom  F  i^i  C ) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( F `  u )  -  x
) )  <  e
) ) )
97, 8ax-mp 5 . . . . . . . 8  |-  ( A. u  e.  dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  <  d )  -> 
( abs `  (
( F `  u
)  -  x ) )  <  e )  ->  A. u  e.  ( dom  F  i^i  C
) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( F `  u )  -  x
) )  <  e
) )
10 elinel2 3314 . . . . . . . . . . . . . . 15  |-  ( u  e.  ( dom  F  i^i  C )  ->  u  e.  C )
11 fvres 5520 . . . . . . . . . . . . . . 15  |-  ( u  e.  C  ->  (
( F  |`  C ) `
 u )  =  ( F `  u
) )
1210, 11syl 14 . . . . . . . . . . . . . 14  |-  ( u  e.  ( dom  F  i^i  C )  ->  (
( F  |`  C ) `
 u )  =  ( F `  u
) )
1312adantl 275 . . . . . . . . . . . . 13  |-  ( ( x  e.  ( F lim
CC  B )  /\  u  e.  ( dom  F  i^i  C ) )  ->  ( ( F  |`  C ) `  u
)  =  ( F `
 u ) )
1413fvoveq1d 5875 . . . . . . . . . . . 12  |-  ( ( x  e.  ( F lim
CC  B )  /\  u  e.  ( dom  F  i^i  C ) )  ->  ( abs `  (
( ( F  |`  C ) `  u
)  -  x ) )  =  ( abs `  ( ( F `  u )  -  x
) ) )
1514breq1d 3999 . . . . . . . . . . 11  |-  ( ( x  e.  ( F lim
CC  B )  /\  u  e.  ( dom  F  i^i  C ) )  ->  ( ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e  <->  ( abs `  ( ( F `  u )  -  x
) )  <  e
) )
1615imbi2d 229 . . . . . . . . . 10  |-  ( ( x  e.  ( F lim
CC  B )  /\  u  e.  ( dom  F  i^i  C ) )  ->  ( ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( ( F  |`  C ) `  u )  -  x
) )  <  e
)  <->  ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( F `  u )  -  x
) )  <  e
) ) )
1716biimprd 157 . . . . . . . . 9  |-  ( ( x  e.  ( F lim
CC  B )  /\  u  e.  ( dom  F  i^i  C ) )  ->  ( ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e )  ->  (
( u #  B  /\  ( abs `  ( u  -  B ) )  <  d )  -> 
( abs `  (
( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
1817ralimdva 2537 . . . . . . . 8  |-  ( x  e.  ( F lim CC  B )  ->  ( A. u  e.  ( dom  F  i^i  C ) ( ( u #  B  /\  ( abs `  (
u  -  B ) )  <  d )  ->  ( abs `  (
( F `  u
)  -  x ) )  <  e )  ->  A. u  e.  ( dom  F  i^i  C
) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
199, 18syl5 32 . . . . . . 7  |-  ( x  e.  ( F lim CC  B )  ->  ( A. u  e.  dom  F ( ( u #  B  /\  ( abs `  (
u  -  B ) )  <  d )  ->  ( abs `  (
( F `  u
)  -  x ) )  <  e )  ->  A. u  e.  ( dom  F  i^i  C
) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
2019reximdv 2571 . . . . . 6  |-  ( x  e.  ( F lim CC  B )  ->  ( E. d  e.  RR+  A. u  e.  dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e )  ->  E. d  e.  RR+  A. u  e.  ( dom  F  i^i  C ) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
2120ralimdv 2538 . . . . 5  |-  ( x  e.  ( F lim CC  B )  ->  ( A. e  e.  RR+  E. d  e.  RR+  A. u  e. 
dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e )  ->  A. e  e.  RR+  E. d  e.  RR+  A. u  e.  ( dom  F  i^i  C
) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
2221anim2d 335 . . . 4  |-  ( x  e.  ( F lim CC  B )  ->  (
( x  e.  CC  /\ 
A. e  e.  RR+  E. d  e.  RR+  A. u  e.  dom  F ( ( u #  B  /\  ( abs `  ( u  -  B ) )  < 
d )  ->  ( abs `  ( ( F `
 u )  -  x ) )  < 
e ) )  -> 
( x  e.  CC  /\ 
A. e  e.  RR+  E. d  e.  RR+  A. u  e.  ( dom  F  i^i  C ) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) ) )
236, 22mpd 13 . . 3  |-  ( x  e.  ( F lim CC  B )  ->  (
x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. u  e.  ( dom  F  i^i  C ) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) )
24 fresin 5376 . . . . 5  |-  ( F : dom  F --> CC  ->  ( F  |`  C ) : ( dom  F  i^i  C ) --> CC )
252, 24syl 14 . . . 4  |-  ( x  e.  ( F lim CC  B )  ->  ( F  |`  C ) : ( dom  F  i^i  C ) --> CC )
267, 3sstrid 3158 . . . 4  |-  ( x  e.  ( F lim CC  B )  ->  ( dom  F  i^i  C ) 
C_  CC )
2725, 26, 4ellimc3ap 13424 . . 3  |-  ( x  e.  ( F lim CC  B )  ->  (
x  e.  ( ( F  |`  C ) lim CC  B )  <->  ( x  e.  CC  /\  A. e  e.  RR+  E. d  e.  RR+  A. u  e.  ( dom  F  i^i  C
) ( ( u #  B  /\  ( abs `  ( u  -  B
) )  <  d
)  ->  ( abs `  ( ( ( F  |`  C ) `  u
)  -  x ) )  <  e ) ) ) )
2823, 27mpbird 166 . 2  |-  ( x  e.  ( F lim CC  B )  ->  x  e.  ( ( F  |`  C ) lim CC  B ) )
2928ssriv 3151 1  |-  ( F lim
CC  B )  C_  ( ( F  |`  C ) lim CC  B )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    = wceq 1348    e. wcel 2141   A.wral 2448   E.wrex 2449    i^i cin 3120    C_ wss 3121   class class class wbr 3989   dom cdm 4611    |` cres 4613   -->wf 5194   ` cfv 5198  (class class class)co 5853   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-res 4623  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:  dvidlemap  13454  dvcnp2cntop  13457  dvcoapbr  13465
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