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Theorem dmex 4998
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  e. 
_V
Assertion
Ref Expression
dmex  |-  dom  A  e.  _V

Proof of Theorem dmex
StepHypRef Expression
1 dmex.1 . 2  |-  A  e. 
_V
2 dmexg 4995 . 2  |-  ( A  e.  _V  ->  dom  A  e.  _V )
31, 2ax-mp 5 1  |-  dom  A  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 2201   _Vcvv 2801   dom cdm 4724
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 2203  ax-14 2204  ax-ext 2212  ax-sep 4206  ax-pow 4263  ax-pr 4298  ax-un 4529
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-rex 2515  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-pw 3653  df-sn 3674  df-pr 3675  df-op 3677  df-uni 3893  df-br 4088  df-opab 4150  df-cnv 4732  df-dm 4734  df-rn 4735
This theorem is referenced by:  ofmres  6300  fo1st  6322  tfrlem8  6486  rdgtfr  6542  rdgruledefgg  6543  rdgon  6554  mapprc  6823  ixpprc  6890  ixpssmap2g  6898  ixpssmapg  6899  bren  6919  brdomg  6921  fundmen  6983  xpassen  7016  mapen  7034  ssenen  7039  hashfacen  11103  shftfval  11401  prdsvallem  13375  prdsval  13376  blfn  14586  metuex  14590
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