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Theorem ixpin 6689
Description: The intersection of two infinite Cartesian products. (Contributed by Mario Carneiro, 3-Feb-2015.)
Assertion
Ref Expression
ixpin  |-  X_ x  e.  A  ( B  i^i  C )  =  (
X_ x  e.  A  B  i^i  X_ x  e.  A  C )
Distinct variable group:    x, A
Allowed substitution hints:    B( x)    C( x)

Proof of Theorem ixpin
Dummy variable  f is distinct from all other variables.
StepHypRef Expression
1 anandi 580 . . . 4  |-  ( ( f  Fn  A  /\  ( A. x  e.  A  ( f `  x
)  e.  B  /\  A. x  e.  A  ( f `  x )  e.  C ) )  <-> 
( ( f  Fn  A  /\  A. x  e.  A  ( f `  x )  e.  B
)  /\  ( f  Fn  A  /\  A. x  e.  A  ( f `  x )  e.  C
) ) )
2 elin 3305 . . . . . . 7  |-  ( ( f `  x )  e.  ( B  i^i  C )  <->  ( ( f `
 x )  e.  B  /\  ( f `
 x )  e.  C ) )
32ralbii 2472 . . . . . 6  |-  ( A. x  e.  A  (
f `  x )  e.  ( B  i^i  C
)  <->  A. x  e.  A  ( ( f `  x )  e.  B  /\  ( f `  x
)  e.  C ) )
4 r19.26 2592 . . . . . 6  |-  ( A. x  e.  A  (
( f `  x
)  e.  B  /\  ( f `  x
)  e.  C )  <-> 
( A. x  e.  A  ( f `  x )  e.  B  /\  A. x  e.  A  ( f `  x
)  e.  C ) )
53, 4bitri 183 . . . . 5  |-  ( A. x  e.  A  (
f `  x )  e.  ( B  i^i  C
)  <->  ( A. x  e.  A  ( f `  x )  e.  B  /\  A. x  e.  A  ( f `  x
)  e.  C ) )
65anbi2i 453 . . . 4  |-  ( ( f  Fn  A  /\  A. x  e.  A  ( f `  x )  e.  ( B  i^i  C ) )  <->  ( f  Fn  A  /\  ( A. x  e.  A  ( f `  x
)  e.  B  /\  A. x  e.  A  ( f `  x )  e.  C ) ) )
7 vex 2729 . . . . . 6  |-  f  e. 
_V
87elixp 6671 . . . . 5  |-  ( f  e.  X_ x  e.  A  B 
<->  ( f  Fn  A  /\  A. x  e.  A  ( f `  x
)  e.  B ) )
97elixp 6671 . . . . 5  |-  ( f  e.  X_ x  e.  A  C 
<->  ( f  Fn  A  /\  A. x  e.  A  ( f `  x
)  e.  C ) )
108, 9anbi12i 456 . . . 4  |-  ( ( f  e.  X_ x  e.  A  B  /\  f  e.  X_ x  e.  A  C )  <->  ( (
f  Fn  A  /\  A. x  e.  A  ( f `  x )  e.  B )  /\  ( f  Fn  A  /\  A. x  e.  A  ( f `  x
)  e.  C ) ) )
111, 6, 103bitr4i 211 . . 3  |-  ( ( f  Fn  A  /\  A. x  e.  A  ( f `  x )  e.  ( B  i^i  C ) )  <->  ( f  e.  X_ x  e.  A  B  /\  f  e.  X_ x  e.  A  C
) )
127elixp 6671 . . 3  |-  ( f  e.  X_ x  e.  A  ( B  i^i  C )  <-> 
( f  Fn  A  /\  A. x  e.  A  ( f `  x
)  e.  ( B  i^i  C ) ) )
13 elin 3305 . . 3  |-  ( f  e.  ( X_ x  e.  A  B  i^i  X_ x  e.  A  C
)  <->  ( f  e.  X_ x  e.  A  B  /\  f  e.  X_ x  e.  A  C
) )
1411, 12, 133bitr4i 211 . 2  |-  ( f  e.  X_ x  e.  A  ( B  i^i  C )  <-> 
f  e.  ( X_ x  e.  A  B  i^i  X_ x  e.  A  C ) )
1514eqriv 2162 1  |-  X_ x  e.  A  ( B  i^i  C )  =  (
X_ x  e.  A  B  i^i  X_ x  e.  A  C )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1343    e. wcel 2136   A.wral 2444    i^i cin 3115    Fn wfn 5183   ` cfv 5188   X_cixp 6664
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-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-ext 2147
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-iota 5153  df-fun 5190  df-fn 5191  df-fv 5196  df-ixp 6665
This theorem is referenced by: (None)
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