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Theorem limon 4566
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 4539 . 2 Ord On
2 0elon 4444 . 2 ∅ ∈ On
3 unon 4564 . . 3 On = On
43eqcomi 2210 . 2 On = On
5 dflim2 4422 . 2 (Lim On ↔ (Ord On ∧ ∅ ∈ On ∧ On = On))
61, 2, 4, 5mpbir3an 1182 1 Lim On
Colors of variables: wff set class
Syntax hints:   = wceq 1373  wcel 2177  c0 3462   cuni 3853  Ord word 4414  Oncon0 4415  Lim wlim 4416
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2179  ax-14 2180  ax-ext 2188  ax-sep 4167  ax-nul 4175  ax-pow 4223  ax-pr 4258  ax-un 4485
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ral 2490  df-rex 2491  df-v 2775  df-dif 3170  df-un 3172  df-in 3174  df-ss 3181  df-nul 3463  df-pw 3620  df-sn 3641  df-pr 3642  df-uni 3854  df-tr 4148  df-iord 4418  df-on 4420  df-ilim 4421  df-suc 4423
This theorem is referenced by: (None)
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