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Theorem ralcom 2706
Description: Commutation of restricted quantifiers. (Contributed by NM, 13-Oct-1999.) (Revised by Mario Carneiro, 14-Oct-2016.)
Assertion
Ref Expression
ralcom  |-  ( A. x  e.  A  A. y  e.  B  ph  <->  A. y  e.  B  A. x  e.  A  ph )
Distinct variable groups:    x, y    x, B    y, A
Allowed substitution hints:    ph( x, y)    A( x)    B( y)

Proof of Theorem ralcom
StepHypRef Expression
1 nfcv 2384 . 2  |-  F/_ y A
2 nfcv 2384 . 2  |-  F/_ x B
31, 2ralcomf 2704 1  |-  ( A. x  e.  A  A. y  e.  B  ph  <->  A. y  e.  B  A. x  e.  A  ph )
Colors of variables: wff set class
Syntax hints:    <-> wb 105   A.wral 2520
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-ext 2214
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1812  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525
This theorem is referenced by:  ralrot3  2708  ralcom4  2836  ssint  3965  issod  4440  reusv3  4581  cnvpom  5305  cnvsom  5306  fununi  5424  isocnv2  5985  dfsmo2  6518  ixpiinm  6959  rexfiuz  11674  isnsg2  13920  opprsubrngg  14356  opprdomnbg  14420  rmodislmodlem  14498  rmodislmod  14499  tgss2  14944  cnmptcom  15163
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