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Theorem dmex 4999
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 4996 . 2 (𝐴 ∈ V → dom 𝐴 ∈ V)
31, 2ax-mp 5 1 dom 𝐴 ∈ V
Colors of variables: wff set class
Syntax hints:  wcel 2202  Vcvv 2802  dom cdm 4725
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-cnv 4733  df-dm 4735  df-rn 4736
This theorem is referenced by:  ofmres  6297  fo1st  6319  tfrlem8  6483  rdgtfr  6539  rdgruledefgg  6540  rdgon  6551  mapprc  6820  ixpprc  6887  ixpssmap2g  6895  ixpssmapg  6896  bren  6916  brdomg  6918  fundmen  6980  xpassen  7013  mapen  7031  ssenen  7036  hashfacen  11099  shftfval  11381  prdsvallem  13354  prdsval  13355  blfn  14564  metuex  14568
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