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Theorem prcnel 3464
Description: A proper class doesn't belong to any class. (Contributed by Glauco Siliprandi, 17-Aug-2020.) (Proof shortened by AV, 14-Nov-2020.)
Assertion
Ref Expression
prcnel 𝐴 ∈ V → ¬ 𝐴𝑉)

Proof of Theorem prcnel
StepHypRef Expression
1 elex 3459 . 2 (𝐴𝑉𝐴 ∈ V)
21con3i 154 1 𝐴 ∈ V → ¬ 𝐴𝑉)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wcel 2113  Vcvv 3438
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2706
This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1544  df-ex 1781  df-sb 2068  df-clab 2713  df-cleq 2726  df-clel 2809  df-v 3440
This theorem is referenced by:  suppco  8146  fundmge2nop0  14423  fun2dmnop0  14425  vtxval  29022  iedgval  29023  xoromon  35194  fmlafvel  35528  isinf2  37549  eliin2f  45290  dfatprc  47318  afvprc  47332  afv2prc  47414
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