ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  dmex GIF version

Theorem dmex 5051
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 5048 . 2 (𝐴 ∈ V → dom 𝐴 ∈ V)
31, 2ax-mp 5 1 dom 𝐴 ∈ V
Colors of variables:    wff set class
This proof depends on syntax axioms:   ∈ wcel 2209  Vcvv 2821  dom cdm 4776
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-un 4580
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4132  df-opab 4194  df-cnv 4784  df-dm 4786  df-rn 4787
This theorem is used by:  ofmres  6373  fo1st  6395  tfrlem8  6594  rdgtfr  6650  rdgruledefgg  6651  rdgon  6662  mapprc  6931  ixpprc  7007  ixpssmap2g  7015  ixpssmapg  7016  bren  7036  brdomg  7038  fundmen  7100  xpassen  7134  mapen  7152  ssenen  7158  hashfacen  11305  shftfval  11607  prdsvallem  13679  prdsval  14279  blfn  14996  metuex  15000
  Copyright terms: Public domain W3C validator