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Theorem ruv 9671
Description: The Russell class is equal to the universe V. Exercise 5 of [TakeutiZaring] p. 22. (Contributed by Alan Sare, 4-Oct-2008.)
Assertion
Ref Expression
ruv {𝑥𝑥𝑥} = V

Proof of Theorem ruv
StepHypRef Expression
1 vex 3492 . . . 4 𝑥 ∈ V
2 elirr 9666 . . . . 5 ¬ 𝑥𝑥
32nelir 3055 . . . 4 𝑥𝑥
41, 32th 264 . . 3 (𝑥 ∈ V ↔ 𝑥𝑥)
54eqabi 2880 . 2 V = {𝑥𝑥𝑥}
65eqcomi 2749 1 {𝑥𝑥𝑥} = V
Colors of variables: wff setvar class
Syntax hints:   = wceq 1537  wcel 2108  {cab 2717  wnel 3052  Vcvv 3488
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-pr 5447  ax-reg 9661
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-tru 1540  df-ex 1778  df-nf 1782  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-nel 3053  df-ral 3068  df-rex 3077  df-v 3490  df-un 3981  df-sn 4649  df-pr 4651
This theorem is referenced by:  ruALT  9672
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