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Theorem eldm2 5851
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 5849 . 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 3441  cop 4587  dom cdm 5625
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 3401  df-v 3443  df-dif 3905  df-un 3907  df-ss 3919  df-nul 4287  df-if 4481  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-dm 5635
This theorem is referenced by:  dmss  5852  opeldm  5857  dmin  5861  dmiun  5863  dmuni  5864  dm0  5870  reldm0  5878  dmrnssfld  5924  dmcoss  5925  dmcossOLD  5926  dmcosseq  5928  dmcosseqOLD  5929  dmcosseqOLDOLD  5930  dmres  5972  iss  5995  dmsnopg  6172  funssres  6537  dmfco  6931  fiun  7889  f1iun  7890  frrlem8  8237  frrlem10  8239  axdc3lem2  10365  fnpr2ob  17483  gsum2d2  19907  cnlnssadj  32159  prsdm  34073  eldm3  35957  dfdm5  35969  iss2  38547
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