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Theorem dmresexg 6023
Description: The domain of a restriction to a set exists. (Contributed by NM, 7-Apr-1995.)
Assertion
Ref Expression
dmresexg (𝐵𝑉 → dom (𝐴𝐵) ∈ V)

Proof of Theorem dmresexg
StepHypRef Expression
1 dmres 6021 . 2 dom (𝐴𝐵) = (𝐵 ∩ dom 𝐴)
2 inex1g 5323 . 2 (𝐵𝑉 → (𝐵 ∩ dom 𝐴) ∈ V)
31, 2eqeltrid 2833 1 (𝐵𝑉 → dom (𝐴𝐵) ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2098  Vcvv 3473  cin 3948  dom cdm 5682  cres 5684
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-ext 2699  ax-sep 5303  ax-nul 5310  ax-pr 5433
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-sb 2060  df-clab 2706  df-cleq 2720  df-clel 2806  df-ral 3059  df-rex 3068  df-rab 3431  df-v 3475  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4327  df-if 4533  df-sn 4633  df-pr 4635  df-op 4639  df-br 5153  df-opab 5215  df-xp 5688  df-dm 5692  df-res 5694
This theorem is referenced by:  resfunexg  7233  resfunexgALT  7957
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