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Theorem dmv 3333
Description: The domain of the universe is the universe.
Assertion
Ref Expression
dmv |- dom V = V

Proof of Theorem dmv
StepHypRef Expression
1 ssv 2084 . 2 |- dom V (_ V
2 dmi 3332 . . 3 |- dom I = V
3 ssv 2084 . . . 4 |- I (_ V
4 dmss 3316 . . . 4 |- (I (_ V -> dom I (_ dom V)
53, 4ax-mp 7 . . 3 |- dom I (_ dom V
62, 5eqsstr3 2095 . 2 |- V (_ dom V
71, 6eqssi 2081 1 |- dom V = V
Colors of variables: wff set class
Syntax hints:   = wceq 958  Vcvv 1814   (_ wss 2050  Icid 2837  dom cdm 3176
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 964  ax-gen 965  ax-8 966  ax-9 967  ax-10 968  ax-11 969  ax-12 970  ax-13 971  ax-14 972  ax-17 973  ax-4 975  ax-5o 977  ax-6o 980  ax-9o 1125  ax-10o 1142  ax-16 1212  ax-11o 1220  ax-ext 1462  ax-sep 2708  ax-pow 2748  ax-pr 2785
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 983  df-sb 1174  df-eu 1384  df-mo 1385  df-clab 1467  df-cleq 1472  df-clel 1475  df-ne 1590  df-v 1815  df-dif 2052  df-un 2053  df-in 2054  df-ss 2056  df-nul 2284  df-pw 2406  df-sn 2416  df-pr 2417  df-op 2420  df-br 2625  df-opab 2672  df-id 2841  df-xp 3190  df-rel 3191  df-dm 3194
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