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Theorem eldm2 5734
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 5732 . 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 209  wex 1781  wcel 2111  Vcvv 3441  cop 4531  dom cdm 5519
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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-v 3443  df-un 3886  df-sn 4526  df-pr 4528  df-op 4532  df-br 5031  df-dm 5529
This theorem is referenced by:  dmss  5735  opeldm  5740  dmin  5744  dmiun  5746  dmuni  5747  dm0  5754  reldm0  5762  dmrnssfld  5806  dmcoss  5807  dmcosseq  5809  dmres  5840  iss  5870  dmsnopg  6037  relssdmrn  6088  funssres  6368  dmfco  6734  fiun  7626  f1iun  7627  wfrlem12  7949  axdc3lem2  9862  fnpr2ob  16823  gsum2d2  19087  cnlnssadj  29863  prsdm  31267  eldm3  33110  dfdm5  33129  frrlem8  33243  frrlem10  33245  iss2  35761
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