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Theorem elima2 6023
Description: Membership in an image. Theorem 34 of [Suppes] p. 65. (Contributed by NM, 11-Aug-2004.)
Hypothesis
Ref Expression
elima.1 𝐴 ∈ V
Assertion
Ref Expression
elima2 (𝐴 ∈ (𝐵𝐶) ↔ ∃𝑥(𝑥𝐶𝑥𝐵𝐴))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶

Proof of Theorem elima2
StepHypRef Expression
1 elima.1 . . 3 𝐴 ∈ V
21elima 6022 . 2 (𝐴 ∈ (𝐵𝐶) ↔ ∃𝑥𝐶 𝑥𝐵𝐴)
3 df-rex 3059 . 2 (∃𝑥𝐶 𝑥𝐵𝐴 ↔ ∃𝑥(𝑥𝐶𝑥𝐵𝐴))
42, 3bitri 275 1 (𝐴 ∈ (𝐵𝐶) ↔ ∃𝑥(𝑥𝐶𝑥𝐵𝐴))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wex 1780  wcel 2113  wrex 3058  Vcvv 3438   class class class wbr 5096  cima 5625
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2706  ax-sep 5239  ax-nul 5249  ax-pr 5375
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2713  df-cleq 2726  df-clel 2809  df-ral 3050  df-rex 3059  df-rab 3398  df-v 3440  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4284  df-if 4478  df-sn 4579  df-pr 4581  df-op 4585  df-br 5097  df-opab 5159  df-xp 5628  df-cnv 5630  df-dm 5632  df-rn 5633  df-res 5634  df-ima 5635
This theorem is referenced by:  elima3  6024  dminss  6109  imainss  6110  imadif  6574  metcld2  25261  isch2  31247  dfdm5  35916  dfrn5  35917  brimg  36078  coxp  49020
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