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Theorem eldm2 5810
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 5808 . 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 205  wex 1782  wcel 2106  Vcvv 3432  cop 4567  dom cdm 5589
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-br 5075  df-dm 5599
This theorem is referenced by:  dmss  5811  opeldm  5816  dmin  5820  dmiun  5822  dmuni  5823  dm0  5829  reldm0  5837  dmrnssfld  5879  dmcoss  5880  dmcosseq  5882  dmres  5913  iss  5943  dmsnopg  6116  relssdmrn  6172  funssres  6478  dmfco  6864  fiun  7785  f1iun  7786  frrlem8  8109  frrlem10  8111  wfrlem12OLD  8151  axdc3lem2  10207  fnpr2ob  17269  gsum2d2  19575  cnlnssadj  30442  prsdm  31864  eldm3  33728  dfdm5  33747  iss2  36479
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