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Theorem xkobval 20532
Description: Alternative expression for the subbase of the compact-open topology. (Contributed by Mario Carneiro, 23-Mar-2015.)
Hypotheses
Ref Expression
xkoval.x  |-  X  = 
U. R
xkoval.k  |-  K  =  { x  e.  ~P X  |  ( Rt  x
)  e.  Comp }
xkoval.t  |-  T  =  ( k  e.  K ,  v  e.  S  |->  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } )
Assertion
Ref Expression
xkobval  |-  ran  T  =  { s  |  E. k  e.  ~P  X E. v  e.  S  ( ( Rt  k )  e.  Comp  /\  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) }
Distinct variable groups:    k, s,
v, K    f, k,
s, v, x, R    S, f, k, s, v, x    T, s    k, X, x
Allowed substitution hints:    T( x, v, f, k)    K( x, f)    X( v, f, s)

Proof of Theorem xkobval
StepHypRef Expression
1 xkoval.t . . 3  |-  T  =  ( k  e.  K ,  v  e.  S  |->  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } )
21rnmpt2 6420 . 2  |-  ran  T  =  { s  |  E. k  e.  K  E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } }
3 oveq2 6313 . . . . . 6  |-  ( x  =  k  ->  ( Rt  x )  =  ( Rt  k ) )
43eleq1d 2498 . . . . 5  |-  ( x  =  k  ->  (
( Rt  x )  e.  Comp  <->  ( Rt  k )  e.  Comp ) )
54rexrab 3241 . . . 4  |-  ( E. k  e.  { x  e.  ~P X  |  ( Rt  x )  e.  Comp } E. v  e.  S  s  =  { f  e.  ( R  Cn  S
)  |  ( f
" k )  C_  v }  <->  E. k  e.  ~P  X ( ( Rt  k )  e.  Comp  /\  E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) )
6 xkoval.k . . . . 5  |-  K  =  { x  e.  ~P X  |  ( Rt  x
)  e.  Comp }
76rexeqi 3037 . . . 4  |-  ( E. k  e.  K  E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } 
<->  E. k  e.  {
x  e.  ~P X  |  ( Rt  x )  e.  Comp } E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } )
8 r19.42v 2990 . . . . 5  |-  ( E. v  e.  S  ( ( Rt  k )  e. 
Comp  /\  s  =  {
f  e.  ( R  Cn  S )  |  ( f " k
)  C_  v }
)  <->  ( ( Rt  k )  e.  Comp  /\  E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) )
98rexbii 2934 . . . 4  |-  ( E. k  e.  ~P  X E. v  e.  S  ( ( Rt  k )  e.  Comp  /\  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } )  <->  E. k  e.  ~P  X ( ( Rt  k )  e.  Comp  /\ 
E. v  e.  S  s  =  { f  e.  ( R  Cn  S
)  |  ( f
" k )  C_  v } ) )
105, 7, 93bitr4i 280 . . 3  |-  ( E. k  e.  K  E. v  e.  S  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } 
<->  E. k  e.  ~P  X E. v  e.  S  ( ( Rt  k )  e.  Comp  /\  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) )
1110abbii 2563 . 2  |-  { s  |  E. k  e.  K  E. v  e.  S  s  =  {
f  e.  ( R  Cn  S )  |  ( f " k
)  C_  v } }  =  { s  |  E. k  e.  ~P  X E. v  e.  S  ( ( Rt  k )  e.  Comp  /\  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) }
122, 11eqtri 2458 1  |-  ran  T  =  { s  |  E. k  e.  ~P  X E. v  e.  S  ( ( Rt  k )  e.  Comp  /\  s  =  { f  e.  ( R  Cn  S )  |  ( f "
k )  C_  v } ) }
Colors of variables: wff setvar class
Syntax hints:    /\ wa 370    = wceq 1437    e. wcel 1870   {cab 2414   E.wrex 2783   {crab 2786    C_ wss 3442   ~Pcpw 3985   U.cuni 4222   ran crn 4855   "cima 4857  (class class class)co 6305    |-> cmpt2 6307   ↾t crest 15278    Cn ccn 20171   Compccmp 20332
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1665  ax-4 1678  ax-5 1751  ax-6 1797  ax-7 1841  ax-9 1874  ax-10 1889  ax-11 1894  ax-12 1907  ax-13 2055  ax-ext 2407  ax-sep 4548  ax-nul 4556  ax-pr 4661
This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372  df-3an 984  df-tru 1440  df-ex 1660  df-nf 1664  df-sb 1790  df-eu 2270  df-mo 2271  df-clab 2415  df-cleq 2421  df-clel 2424  df-nfc 2579  df-ne 2627  df-ral 2787  df-rex 2788  df-rab 2791  df-v 3089  df-dif 3445  df-un 3447  df-in 3449  df-ss 3456  df-nul 3768  df-if 3916  df-sn 4003  df-pr 4005  df-op 4009  df-uni 4223  df-br 4427  df-opab 4485  df-cnv 4862  df-dm 4864  df-rn 4865  df-iota 5565  df-fv 5609  df-ov 6308  df-oprab 6309  df-mpt2 6310
This theorem is referenced by:  xkoccn  20565  xkoco1cn  20603  xkoco2cn  20604  xkoinjcn  20633
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