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Theorem brxp 4540
Description: Binary relation on a cross product. (Contributed by NM, 22-Apr-2004.)
Assertion
Ref Expression
brxp  |-  ( A ( C  X.  D
) B  <->  ( A  e.  C  /\  B  e.  D ) )

Proof of Theorem brxp
StepHypRef Expression
1 df-br 3900 . 2  |-  ( A ( C  X.  D
) B  <->  <. A ,  B >.  e.  ( C  X.  D ) )
2 opelxp 4539 . 2  |-  ( <. A ,  B >.  e.  ( C  X.  D
)  <->  ( A  e.  C  /\  B  e.  D ) )
31, 2bitri 183 1  |-  ( A ( C  X.  D
) B  <->  ( A  e.  C  /\  B  e.  D ) )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    <-> wb 104    e. wcel 1465   <.cop 3500   class class class wbr 3899    X. cxp 4507
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 683  ax-5 1408  ax-7 1409  ax-gen 1410  ax-ie1 1454  ax-ie2 1455  ax-8 1467  ax-10 1468  ax-11 1469  ax-i12 1470  ax-bndl 1471  ax-4 1472  ax-14 1477  ax-17 1491  ax-i9 1495  ax-ial 1499  ax-i5r 1500  ax-ext 2099  ax-sep 4016  ax-pow 4068  ax-pr 4101
This theorem depends on definitions:  df-bi 116  df-3an 949  df-tru 1319  df-nf 1422  df-sb 1721  df-clab 2104  df-cleq 2110  df-clel 2113  df-nfc 2247  df-ral 2398  df-rex 2399  df-v 2662  df-un 3045  df-in 3047  df-ss 3054  df-pw 3482  df-sn 3503  df-pr 3504  df-op 3506  df-br 3900  df-opab 3960  df-xp 4515
This theorem is referenced by:  brrelex12  4547  brel  4561  brinxp2  4576  eqbrrdva  4679  xpidtr  4899  xpcom  5055  tpostpos  6129  swoer  6425  erinxp  6471  ecopover  6495  ecopoverg  6498  ltxrlt  7798  ltxr  9517
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