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Theorem ralxp 4822
Description: Universal quantification restricted to a cross product is equivalent to a double restricted quantification. The hypothesis specifies an implicit substitution. (Contributed by NM, 7-Feb-2004.) (Revised by Mario Carneiro, 29-Dec-2014.)
Hypothesis
Ref Expression
ralxp.1  |-  ( x  =  <. y ,  z
>.  ->  ( ph  <->  ps )
)
Assertion
Ref Expression
ralxp  |-  ( A. x  e.  ( A  X.  B ) ph  <->  A. y  e.  A  A. z  e.  B  ps )
Distinct variable groups:    x, y, z, A    x, B, z    ph, y, z    ps, x    y, B
Allowed substitution hints:    ph( x)    ps( y,
z)

Proof of Theorem ralxp
StepHypRef Expression
1 iunxpconst 4736 . . 3  |-  U_ y  e.  A  ( {
y }  X.  B
)  =  ( A  X.  B )
21raleqi 2706 . 2  |-  ( A. x  e.  U_  y  e.  A  ( { y }  X.  B )
ph 
<-> 
A. x  e.  ( A  X.  B )
ph )
3 ralxp.1 . . 3  |-  ( x  =  <. y ,  z
>.  ->  ( ph  <->  ps )
)
43raliunxp 4820 . 2  |-  ( A. x  e.  U_  y  e.  A  ( { y }  X.  B )
ph 
<-> 
A. y  e.  A  A. z  e.  B  ps )
52, 4bitr3i 186 1  |-  ( A. x  e.  ( A  X.  B ) ph  <->  A. y  e.  A  A. z  e.  B  ps )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 105    = wceq 1373   A.wral 2484   {csn 3633   <.cop 3636   U_ciun 3927    X. cxp 4674
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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-14 2179  ax-ext 2187  ax-sep 4163  ax-pow 4219  ax-pr 4254
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1484  df-sb 1786  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ral 2489  df-rex 2490  df-v 2774  df-sbc 2999  df-csb 3094  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-iun 3929  df-opab 4107  df-xp 4682  df-rel 4683
This theorem is referenced by:  ralxpf  4825  issref  5066  ffnov  6051  eqfnov  6054  funimassov  6098  f1stres  6247  f2ndres  6248  ecopover  6722  ecopoverg  6725  xpf1o  6943  imasaddfnlemg  13179  srgfcl  13768  txbas  14763  cnmpt21  14796  txmetcnp  15023  txmetcn  15024  qtopbasss  15026  mpodvdsmulf1o  15495  fsumdvdsmul  15496
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