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Theorem csbwrdg 11190
Description: Class substitution for the symbols of a word. (Contributed by Alexander van der Vekens, 15-Jul-2018.)
Assertion
Ref Expression
csbwrdg  |-  ( S  e.  V  ->  [_ S  /  x ]_Word  x  = Word  S )
Distinct variable groups:    x, S    x, V

Proof of Theorem csbwrdg
Dummy variables  l  w are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-word 11161 . . 3  |- Word  x  =  { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> x }
21csbeq2i 3155 . 2  |-  [_ S  /  x ]_Word  x  =  [_ S  /  x ]_ { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> x }
3 sbcrex 3112 . . . . 5  |-  ( [. S  /  x ]. E. l  e.  NN0  w : ( 0..^ l ) --> x  <->  E. l  e.  NN0  [. S  /  x ]. w : ( 0..^ l ) --> x )
4 sbcfg 5488 . . . . . . 7  |-  ( S  e.  V  ->  ( [. S  /  x ]. w : ( 0..^ l ) --> x  <->  [_ S  /  x ]_ w : [_ S  /  x ]_ (
0..^ l ) --> [_ S  /  x ]_ x ) )
5 csbconstg 3142 . . . . . . . 8  |-  ( S  e.  V  ->  [_ S  /  x ]_ w  =  w )
6 csbconstg 3142 . . . . . . . 8  |-  ( S  e.  V  ->  [_ S  /  x ]_ ( 0..^ l )  =  ( 0..^ l ) )
7 csbvarg 3156 . . . . . . . 8  |-  ( S  e.  V  ->  [_ S  /  x ]_ x  =  S )
85, 6, 7feq123d 5480 . . . . . . 7  |-  ( S  e.  V  ->  ( [_ S  /  x ]_ w : [_ S  /  x ]_ ( 0..^ l ) --> [_ S  /  x ]_ x  <->  w :
( 0..^ l ) --> S ) )
94, 8bitrd 188 . . . . . 6  |-  ( S  e.  V  ->  ( [. S  /  x ]. w : ( 0..^ l ) --> x  <->  w :
( 0..^ l ) --> S ) )
109rexbidv 2534 . . . . 5  |-  ( S  e.  V  ->  ( E. l  e.  NN0  [. S  /  x ]. w : ( 0..^ l ) --> x  <->  E. l  e.  NN0  w : ( 0..^ l ) --> S ) )
113, 10bitrid 192 . . . 4  |-  ( S  e.  V  ->  ( [. S  /  x ]. E. l  e.  NN0  w : ( 0..^ l ) --> x  <->  E. l  e.  NN0  w : ( 0..^ l ) --> S ) )
1211abbidv 2350 . . 3  |-  ( S  e.  V  ->  { w  |  [. S  /  x ]. E. l  e.  NN0  w : ( 0..^ l ) --> x }  =  { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> S } )
13 csbabg 3190 . . 3  |-  ( S  e.  V  ->  [_ S  /  x ]_ { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> x }  =  { w  |  [. S  /  x ]. E. l  e.  NN0  w : ( 0..^ l ) --> x } )
14 df-word 11161 . . . 4  |- Word  S  =  { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> S }
1514a1i 9 . . 3  |-  ( S  e.  V  -> Word  S  =  { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> S } )
1612, 13, 153eqtr4d 2274 . 2  |-  ( S  e.  V  ->  [_ S  /  x ]_ { w  |  E. l  e.  NN0  w : ( 0..^ l ) --> x }  = Word  S )
172, 16eqtrid 2276 1  |-  ( S  e.  V  ->  [_ S  /  x ]_Word  x  = Word  S )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1398    e. wcel 2202   {cab 2217   E.wrex 2512   [.wsbc 3032   [_csb 3128   -->wf 5329  (class class class)co 6028   0cc0 8075   NN0cn0 9445  ..^cfzo 10420  Word cword 11160
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-sbc 3033  df-csb 3129  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-br 4094  df-opab 4156  df-id 4396  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-fun 5335  df-fn 5336  df-f 5337  df-word 11161
This theorem is referenced by:  elovmpowrd  11202
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