MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  rexv Structured version   Visualization version   GIF version

Theorem rexv 3457
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 3062 . 2 (∃𝑥 ∈ V 𝜑 ↔ ∃𝑥(𝑥 ∈ V ∧ 𝜑))
2 vex 3433 . . . 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 3061  Vcvv 3429
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 2708
This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2715  df-cleq 2728  df-clel 2811  df-rex 3062  df-v 3431
This theorem is referenced by:  spesbc  3820  exopxfr  5798  elres  5985  elid  6163  dfco2  6209  dfco2a  6210  dffv2  6935  abnex  7711  finacn  9972  ac6s2  10408  ptcmplem3  24019  ustn0  24186  hlimeui  31311  rexcom4f  32537  isrnsiga  34257  onvf1odlem1  35285  prdstotbnd  38115  ac6s3f  38492  moxfr  43124  eldioph2b  43195  kelac1  43491  cbvexsv  44974  sprid  47934
  Copyright terms: Public domain W3C validator