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Theorem limon 4239
Description: The class of ordinal numbers is a limit ordinal. (Contributed by NM, 24-Mar-1995.)
Assertion
Ref Expression
limon Lim On

Proof of Theorem limon
StepHypRef Expression
1 ordon 4212 . 2 Ord On
2 0elon 4129 . 2 ∅ ∈ On
3 unon 4237 . . 3 On = On
43eqcomi 2044 . 2 On = On
5 dflim2 4107 . 2 (Lim On ↔ (Ord On ∧ ∅ ∈ On ∧ On = On))
61, 2, 4, 5mpbir3an 1086 1 Lim On
Colors of variables: wff set class
Syntax hints:   = wceq 1243  wcel 1393  c0 3224   cuni 3580  Ord word 4099  Oncon0 4100  Lim wlim 4101
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-13 1404  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-nul 3883  ax-pow 3927  ax-pr 3944  ax-un 4170
This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ral 2311  df-rex 2312  df-v 2559  df-dif 2920  df-un 2922  df-in 2924  df-ss 2931  df-nul 3225  df-pw 3361  df-sn 3381  df-pr 3382  df-uni 3581  df-tr 3855  df-iord 4103  df-on 4105  df-ilim 4106  df-suc 4108
This theorem is referenced by: (None)
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