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Theorem restcldi 16904
Description: A closed set is closed in the subspace topology. (Contributed by Jeff Madsen, 2-Sep-2009.)
Hypothesis
Ref Expression
restcldi.1  |-  X  = 
U. J
Assertion
Ref Expression
restcldi  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  B  e.  ( Clsd `  ( Jt  A ) ) )

Proof of Theorem restcldi
Dummy variable  v is distinct from all other variables.
StepHypRef Expression
1 simp2 956 . . 3  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  B  e.  ( Clsd `  J
) )
2 dfss 3167 . . . . 5  |-  ( B 
C_  A  <->  B  =  ( B  i^i  A ) )
32biimpi 186 . . . 4  |-  ( B 
C_  A  ->  B  =  ( B  i^i  A ) )
433ad2ant3 978 . . 3  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  B  =  ( B  i^i  A ) )
5 ineq1 3363 . . . . 5  |-  ( v  =  B  ->  (
v  i^i  A )  =  ( B  i^i  A ) )
65eqeq2d 2294 . . . 4  |-  ( v  =  B  ->  ( B  =  ( v  i^i  A )  <->  B  =  ( B  i^i  A ) ) )
76rspcev 2884 . . 3  |-  ( ( B  e.  ( Clsd `  J )  /\  B  =  ( B  i^i  A ) )  ->  E. v  e.  ( Clsd `  J
) B  =  ( v  i^i  A ) )
81, 4, 7syl2anc 642 . 2  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  E. v  e.  ( Clsd `  J
) B  =  ( v  i^i  A ) )
9 cldrcl 16763 . . . 4  |-  ( B  e.  ( Clsd `  J
)  ->  J  e.  Top )
1093ad2ant2 977 . . 3  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  J  e.  Top )
11 simp1 955 . . 3  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  A  C_  X )
12 restcldi.1 . . . 4  |-  X  = 
U. J
1312restcld 16903 . . 3  |-  ( ( J  e.  Top  /\  A  C_  X )  -> 
( B  e.  (
Clsd `  ( Jt  A
) )  <->  E. v  e.  ( Clsd `  J
) B  =  ( v  i^i  A ) ) )
1410, 11, 13syl2anc 642 . 2  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  ( B  e.  ( Clsd `  ( Jt  A ) )  <->  E. v  e.  ( Clsd `  J
) B  =  ( v  i^i  A ) ) )
158, 14mpbird 223 1  |-  ( ( A  C_  X  /\  B  e.  ( Clsd `  J )  /\  B  C_  A )  ->  B  e.  ( Clsd `  ( Jt  A ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ w3a 934    = wceq 1623    e. wcel 1684   E.wrex 2544    i^i cin 3151    C_ wss 3152   U.cuni 3827   ` cfv 5255  (class class class)co 5858   ↾t crest 13325   Topctop 16631   Clsdccld 16753
This theorem is referenced by:  txkgen  17346  qtoprest  17408  cnmpt2pc  18426  cnheiborlem  18452  abelth  19817  cvmliftlem10  23825
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-rep 4131  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-reu 2550  df-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pss 3168  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-tp 3648  df-op 3649  df-uni 3828  df-int 3863  df-iun 3907  df-br 4024  df-opab 4078  df-mpt 4079  df-tr 4114  df-eprel 4305  df-id 4309  df-po 4314  df-so 4315  df-fr 4352  df-we 4354  df-ord 4395  df-on 4396  df-lim 4397  df-suc 4398  df-om 4657  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-ov 5861  df-oprab 5862  df-mpt2 5863  df-1st 6122  df-2nd 6123  df-recs 6388  df-rdg 6423  df-oadd 6483  df-er 6660  df-en 6864  df-fin 6867  df-fi 7165  df-rest 13327  df-topgen 13344  df-top 16636  df-bases 16638  df-topon 16639  df-cld 16756
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