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Theorem eldm2 5865
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 5863 . 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 3447  cop 4595  dom cdm 5638
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 3406  df-v 3449  df-dif 3917  df-un 3919  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-br 5108  df-dm 5648
This theorem is referenced by:  dmss  5866  opeldm  5871  dmin  5875  dmiun  5877  dmuni  5878  dm0  5884  reldm0  5891  dmrnssfld  5937  dmcoss  5938  dmcosseq  5940  dmcosseqOLD  5941  dmres  5983  iss  6006  dmsnopg  6186  relssdmrnOLD  6242  funssres  6560  dmfco  6957  fiun  7921  f1iun  7922  frrlem8  8272  frrlem10  8274  axdc3lem2  10404  fnpr2ob  17521  gsum2d2  19904  cnlnssadj  32009  prsdm  33904  eldm3  35748  dfdm5  35760  iss2  38326
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