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Theorem dmex 4944
Description: The domain of a set is a set. Corollary 6.8(2) of [TakeutiZaring] p. 26. (Contributed by NM, 7-Jul-2008.)
Hypothesis
Ref Expression
dmex.1 𝐴 ∈ V
Assertion
Ref Expression
dmex dom 𝐴 ∈ V

Proof of Theorem dmex
StepHypRef Expression
1 dmex.1 . 2 𝐴 ∈ V
2 dmexg 4941 . 2 (𝐴 ∈ V → dom 𝐴 ∈ V)
31, 2ax-mp 5 1 dom 𝐴 ∈ V
Colors of variables: wff set class
Syntax hints:  wcel 2175  Vcvv 2771  dom cdm 4674
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-13 2177  ax-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252  ax-un 4479
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-rex 2489  df-v 2773  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-br 4044  df-opab 4105  df-cnv 4682  df-dm 4684  df-rn 4685
This theorem is referenced by:  ofmres  6220  fo1st  6242  tfrlem8  6403  rdgtfr  6459  rdgruledefgg  6460  rdgon  6471  mapprc  6738  ixpprc  6805  ixpssmap2g  6813  ixpssmapg  6814  bren  6834  brdomg  6836  fundmen  6897  xpassen  6924  mapen  6942  ssenen  6947  hashfacen  10979  shftfval  11074  prdsvallem  13046  prdsval  13047  blfn  14255  metuex  14259
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