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Theorem cldval 16760
Description: The set of closed sets of a topology. (Note that the set of open sets is just the topology itself, so we don't have a separate definition.) (Contributed by NM, 2-Oct-2006.) (Revised by Mario Carneiro, 11-Nov-2013.)
Hypothesis
Ref Expression
cldval.1  |-  X  = 
U. J
Assertion
Ref Expression
cldval  |-  ( J  e.  Top  ->  ( Clsd `  J )  =  { x  e.  ~P X  |  ( X  \  x )  e.  J } )
Distinct variable groups:    x, J    x, X

Proof of Theorem cldval
Dummy variable  j is distinct from all other variables.
StepHypRef Expression
1 cldval.1 . . . 4  |-  X  = 
U. J
21topopn 16652 . . 3  |-  ( J  e.  Top  ->  X  e.  J )
3 pwexg 4194 . . 3  |-  ( X  e.  J  ->  ~P X  e.  _V )
4 rabexg 4164 . . 3  |-  ( ~P X  e.  _V  ->  { x  e.  ~P X  |  ( X  \  x )  e.  J }  e.  _V )
52, 3, 43syl 18 . 2  |-  ( J  e.  Top  ->  { x  e.  ~P X  |  ( X  \  x )  e.  J }  e.  _V )
6 unieq 3836 . . . . . 6  |-  ( j  =  J  ->  U. j  =  U. J )
76, 1syl6eqr 2333 . . . . 5  |-  ( j  =  J  ->  U. j  =  X )
87pweqd 3630 . . . 4  |-  ( j  =  J  ->  ~P U. j  =  ~P X
)
97difeq1d 3293 . . . . 5  |-  ( j  =  J  ->  ( U. j  \  x
)  =  ( X 
\  x ) )
10 eleq12 2345 . . . . 5  |-  ( ( ( U. j  \  x )  =  ( X  \  x )  /\  j  =  J )  ->  ( ( U. j  \  x
)  e.  j  <->  ( X  \  x )  e.  J
) )
119, 10mpancom 650 . . . 4  |-  ( j  =  J  ->  (
( U. j  \  x )  e.  j  <-> 
( X  \  x
)  e.  J ) )
128, 11rabeqbidv 2783 . . 3  |-  ( j  =  J  ->  { x  e.  ~P U. j  |  ( U. j  \  x )  e.  j }  =  { x  e.  ~P X  |  ( X  \  x )  e.  J } )
13 df-cld 16756 . . 3  |-  Clsd  =  ( j  e.  Top  |->  { x  e.  ~P U. j  |  ( U. j  \  x )  e.  j } )
1412, 13fvmptg 5600 . 2  |-  ( ( J  e.  Top  /\  { x  e.  ~P X  |  ( X  \  x )  e.  J }  e.  _V )  ->  ( Clsd `  J
)  =  { x  e.  ~P X  |  ( X  \  x )  e.  J } )
155, 14mpdan 649 1  |-  ( J  e.  Top  ->  ( Clsd `  J )  =  { x  e.  ~P X  |  ( X  \  x )  e.  J } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    = wceq 1623    e. wcel 1684   {crab 2547   _Vcvv 2788    \ cdif 3149   ~Pcpw 3625   U.cuni 3827   ` cfv 5255   Topctop 16631   Clsdccld 16753
This theorem is referenced by:  iscld  16764  mretopd  16829
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-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  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-rab 2552  df-v 2790  df-sbc 2992  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-op 3649  df-uni 3828  df-br 4024  df-opab 4078  df-mpt 4079  df-id 4309  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-iota 5219  df-fun 5257  df-fv 5263  df-top 16636  df-cld 16756
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