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Theorem eldm2 5844
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 5842 . 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 1779  wcel 2109  Vcvv 3436  cop 4583  dom cdm 5619
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2701
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-rab 3395  df-v 3438  df-dif 3906  df-un 3908  df-ss 3920  df-nul 4285  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-br 5093  df-dm 5629
This theorem is referenced by:  dmss  5845  opeldm  5850  dmin  5854  dmiun  5856  dmuni  5857  dm0  5863  reldm0  5870  dmrnssfld  5915  dmcoss  5916  dmcossOLD  5917  dmcosseq  5919  dmcosseqOLD  5920  dmcosseqOLDOLD  5921  dmres  5963  iss  5986  dmsnopg  6162  funssres  6526  dmfco  6919  fiun  7878  f1iun  7879  frrlem8  8226  frrlem10  8228  axdc3lem2  10345  fnpr2ob  17462  gsum2d2  19853  cnlnssadj  32028  prsdm  33897  eldm3  35754  dfdm5  35766  iss2  38332
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