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Theorem rexv 3458
Description: An existential quantifier restricted to the universe is unrestricted. (Contributed by NM, 26-Mar-2004.)
Assertion
Ref Expression
rexv (∃𝑥 ∈ V 𝜑 ↔ ∃𝑥𝜑)

Proof of Theorem rexv
StepHypRef Expression
1 df-rex 3063 . 2 (∃𝑥 ∈ V 𝜑 ↔ ∃𝑥(𝑥 ∈ V ∧ 𝜑))
2 vex 3434 . . . 4 𝑥 ∈ V
32biantrur 530 . . 3 (𝜑 ↔ (𝑥 ∈ V ∧ 𝜑))
43exbii 1850 . 2 (∃𝑥𝜑 ↔ ∃𝑥(𝑥 ∈ V ∧ 𝜑))
51, 4bitr4i 278 1 (∃𝑥 ∈ V 𝜑 ↔ ∃𝑥𝜑)
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wex 1781  wcel 2114  wrex 3062  Vcvv 3430
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
This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-rex 3063  df-v 3432
This theorem is referenced by:  spesbc  3821  exopxfr  5790  elres  5977  elid  6155  dfco2  6201  dfco2a  6202  dffv2  6927  abnex  7702  finacn  9961  ac6s2  10397  ptcmplem3  24027  ustn0  24194  hlimeui  31324  rexcom4f  32550  isrnsiga  34271  onvf1odlem1  35299  prdstotbnd  38119  ac6s3f  38496  moxfr  43128  eldioph2b  43199  kelac1  43499  cbvexsv  44982  sprid  47936
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