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Theorem dmresv 6159
Description: The domain of a universal restriction. (Contributed by NM, 14-May-2008.)
Assertion
Ref Expression
dmresv dom (𝐴 ↾ V) = dom 𝐴

Proof of Theorem dmresv
StepHypRef Expression
1 dmres 5972 . 2 dom (𝐴 ↾ V) = (V ∩ dom 𝐴)
2 incom 4150 . 2 (V ∩ dom 𝐴) = (dom 𝐴 ∩ V)
3 inv1 4339 . 2 (dom 𝐴 ∩ V) = dom 𝐴
41, 2, 33eqtri 2764 1 dom (𝐴 ↾ V) = dom 𝐴
Colors of variables: wff setvar class
Syntax hints:   = wceq 1542  Vcvv 3430  cin 3889  dom cdm 5625  cres 5627
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5232  ax-pr 5371
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-br 5087  df-opab 5149  df-xp 5631  df-dm 5635  df-res 5637
This theorem is referenced by:  fidomdm  9238  dmttrcl  9636  dmct  10440  dfsucmap3  38801
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