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Theorem elima2 2607
Description: Membership in an image. Theorem 34 of [Suppes] p. 65.
Hypothesis
Ref Expression
elima.1 AV
Assertion
Ref Expression
elima2 (A ∈ (BC) ↔ ∃x(xCxBA))
Distinct variable group(s):   x,A   x,B   x,C

Proof of Theorem elima2
StepHypRef Expression
1 elima.1 . . 3 AV
21elima 2606 . 2 (A ∈ (BC) ↔ ∃xC xBA)
3 df-rex 1206 . 2 (∃xC xBA ↔ ∃x(xCxBA))
42, 3bitr 151 1 (A ∈ (BC) ↔ ∃x(xCxBA))
Colors of variables: wff set class
Syntax hints:   ↔ wb 127   ∧ wa 196  ∃wex 678   ∈ wcel 1092  ∃wrex 1202  Vcvv 1348   class class class wbr 2054   “ cima 2413
This theorem is referenced by:  elima3 2608  dminss 2648  imainss 2649  imadif 2714
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-rex 1206  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-br 2063  df-opab 2098  df-xp 2424  df-cnv 2426  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431
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