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Theorem elima2 6055
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 6054 . 2 (𝐴 ∈ (𝐵𝐶) ↔ ∃𝑥𝐶 𝑥𝐵𝐴)
3 df-rex 3087 . 2 (∃𝑥𝐶 𝑥𝐵𝐴 ↔ ∃𝑥(𝑥𝐶𝑥𝐵𝐴))
42, 3bitri 277 1 (𝐴 ∈ (𝐵𝐶) ↔ ∃𝑥(𝑥𝐶𝑥𝐵𝐴))
Colors of variables: wff setvar class
Syntax hints:  wb 208  wa 399  wex 1799  wcel 2142  wrex 3086  Vcvv 3454   class class class wbr 5100  cima 5650
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5246  ax-pr 5390
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-sb 2091  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-xp 5653  df-cnv 5655  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660
This theorem is referenced by:  elima3  6056  dminss  6138  imainss  6139  imadif  6605  metcld2  25369  isch2  31426  dfdm5  36123  dfrn5  36124  brimg  36285  coxp  49454
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