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Theorem elima2 5132
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 5131 . 2  |-  ( A  e.  ( B " C )  <->  E. x  e.  C  x B A )
3 df-rex 2534 . 2  |-  ( E. x  e.  C  x B A  <->  E. x
( x  e.  C  /\  x B A ) )
42, 3bitri 184 1  |-  ( A  e.  ( B " C )  <->  E. x
( x  e.  C  /\  x B A ) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    /\ wa 104    <-> wb 105   E.wex 1545    e. wcel 2209   E.wrex 2529   _Vcvv 2821   class class class wbr 4130   "cima 4777
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-br 4131  df-opab 4193  df-xp 4780  df-cnv 4782  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787
This theorem is used by:  elima3  5133  dminss  5202  imainss  5203  nqnq0pi  7805
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