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Theorem omelon2 7890
Description: Omega is an ordinal number. (Contributed by Mario Carneiro, 30-Jan-2013.)
Assertion
Ref Expression
omelon2 (ω ∈ V → ω ∈ On)

Proof of Theorem omelon2
StepHypRef Expression
1 omon 7889 . . . 4 (ω ∈ On ∨ ω = On)
21ori 875 . . 3 (¬ ω ∈ On → ω = On)
3 onprc 7792 . . . 4 ¬ On ∈ V
4 eleq1 2848 . . . 4 (ω = On → (ω ∈ V ↔ On ∈ V))
53, 4mtbiri 330 . . 3 (ω = On → ¬ ω ∈ V)
62, 5syl 18 . 2 (¬ ω ∈ On → ¬ ω ∈ V)
76con4i 115 1 (ω ∈ V → ω ∈ On)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   = wceq 1569   ∈ wcel 2144  Vcvv 3450  Oncon0 6362  ωcom 7877
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-pss 4014  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-tr 5212  df-eprel 5550  df-po 5558  df-so 5559  df-fr 5603  df-we 5605  df-ord 6365  df-on 6366  df-lim 6367  df-om 7878
This theorem is used by:  oaabs  8657  omelon  9647  fictb  10322  axdc3lem  10528  n0ssoldg  28739
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