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Theorem eldm2 5860
Description: Membership in a domain. Theorem 4 of [Suppes] p. 59. (Contributed by NM, 1-Aug-1994.)
Hypothesis
Ref Expression
eldm.1 𝐴 ∈ V
Assertion
Ref Expression
eldm2 (𝐴 ∈ dom 𝐵 ↔ ∃𝑦𝐴, 𝑦⟩ ∈ 𝐵)
Distinct variable groups:   𝑦,𝐴   𝑦,𝐵

Proof of Theorem eldm2
StepHypRef Expression
1 eldm.1 . 2 𝐴 ∈ V
2 eldm2g 5858 . 2 (𝐴 ∈ V → (𝐴 ∈ dom 𝐵 ↔ ∃𝑦𝐴, 𝑦⟩ ∈ 𝐵))
31, 2ax-mp 5 1 (𝐴 ∈ dom 𝐵 ↔ ∃𝑦𝐴, 𝑦⟩ ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wb 206  wex 1781  wcel 2114  Vcvv 3442  cop 4588  dom cdm 5634
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-dm 5644
This theorem is referenced by:  dmss  5861  opeldm  5866  dmin  5870  dmiun  5872  dmuni  5873  dm0  5879  reldm0  5887  dmrnssfld  5933  dmcoss  5934  dmcossOLD  5935  dmcosseq  5937  dmcosseqOLD  5938  dmcosseqOLDOLD  5939  dmres  5981  iss  6004  dmsnopg  6181  funssres  6546  dmfco  6940  fiun  7899  f1iun  7900  frrlem8  8247  frrlem10  8249  axdc3lem2  10375  fnpr2ob  17493  gsum2d2  19920  cnlnssadj  32174  prsdm  34098  eldm3  35983  dfdm5  35995  iss2  38624
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