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Theorem omelon2 7873
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 7872 . . . 4 (ω ∈ On ∨ ω = On)
21ori 874 . . 3 (¬ ω ∈ On → ω = On)
3 onprc 7775 . . . 4 ¬ On ∈ V
4 eleq1 2850 . . . 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 2142  Vcvv 3454  Oncon0 6360  ωcom 7860
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5256  ax-pr 5403
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1103  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-sb 2096  df-clab 2741  df-cleq 2754  df-clel 2837  df-ne 2958  df-ral 3079  df-rex 3089  df-rab 3416  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-pss 3924  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-br 5109  df-opab 5173  df-tr 5218  df-eprel 5560  df-po 5568  df-so 5569  df-fr 5613  df-we 5615  df-ord 6363  df-on 6364  df-lim 6365  df-om 7861
This theorem is used by:  oaabs  8632  omelon  9613  fictb  10234  axdc3lem  10440  n0ssoldg  28557
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