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Theorem elrel 4795
Description: A member of a relation is an ordered pair. (Contributed by NM, 17-Sep-2006.)
Assertion
Ref Expression
elrel  |-  ( ( Rel  R  /\  A  e.  R )  ->  E. x E. y  A  =  <. x ,  y >.
)
Distinct variable group:    x, y, A
Allowed substitution hints:    R( x, y)

Proof of Theorem elrel
StepHypRef Expression
1 df-rel 4700 . . . 4  |-  ( Rel 
R  <->  R  C_  ( _V 
X.  _V ) )
21biimpi 120 . . 3  |-  ( Rel 
R  ->  R  C_  ( _V  X.  _V ) )
32sselda 3201 . 2  |-  ( ( Rel  R  /\  A  e.  R )  ->  A  e.  ( _V  X.  _V ) )
4 elvv 4755 . 2  |-  ( A  e.  ( _V  X.  _V )  <->  E. x E. y  A  =  <. x ,  y >. )
53, 4sylib 122 1  |-  ( ( Rel  R  /\  A  e.  R )  ->  E. x E. y  A  =  <. x ,  y >.
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1373   E.wex 1516    e. wcel 2178   _Vcvv 2776    C_ wss 3174   <.cop 3646    X. cxp 4691   Rel wrel 4698
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 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-v 2778  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-opab 4122  df-xp 4699  df-rel 4700
This theorem is referenced by:  eliunxp  4835  elres  5014  unielrel  5229  funopsn  5785  rntpos  6366
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