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Theorem elima2 4894
Description: Membership in an image. Theorem 34 of [Suppes] p. 65. (Contributed by NM, 11-Aug-2004.)
Hypothesis
Ref Expression
elima.1  |-  A  e. 
_V
Assertion
Ref Expression
elima2  |-  ( A  e.  ( B " C )  <->  E. x
( x  e.  C  /\  x B A ) )
Distinct variable groups:    x, A    x, B    x, C

Proof of Theorem elima2
StepHypRef Expression
1 elima.1 . . 3  |-  A  e. 
_V
21elima 4893 . 2  |-  ( A  e.  ( B " C )  <->  E. x  e.  C  x B A )
3 df-rex 2423 . 2  |-  ( E. x  e.  C  x B A  <->  E. x
( x  e.  C  /\  x B A ) )
42, 3bitri 183 1  |-  ( A  e.  ( B " C )  <->  E. x
( x  e.  C  /\  x B A ) )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    <-> wb 104   E.wex 1469    e. wcel 1481   E.wrex 2418   _Vcvv 2689   class class class wbr 3936   "cima 4549
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 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4053  ax-pow 4105  ax-pr 4138
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-un 3079  df-in 3081  df-ss 3088  df-pw 3516  df-sn 3537  df-pr 3538  df-op 3540  df-br 3937  df-opab 3997  df-xp 4552  df-cnv 4554  df-dm 4556  df-rn 4557  df-res 4558  df-ima 4559
This theorem is referenced by:  elima3  4895  dminss  4960  imainss  4961  nqnq0pi  7269
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