Users' Mathboxes Mathbox for Richard Penner < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  nlim2NEW Structured version   Visualization version   GIF version

Theorem nlim2NEW 41705
Description: 2 is not a limit ordinal. (Contributed by BTernaryTau, 1-Dec-2024.) (Proof shortened by RP, 13-Dec-2024.)
Assertion
Ref Expression
nlim2NEW ¬ Lim 2o

Proof of Theorem nlim2NEW
StepHypRef Expression
1 1on 8424 . 2 1o ∈ On
2 nlimsuc 41703 . . 3 (1o ∈ On → ¬ Lim suc 1o)
3 df-2o 8413 . . . 4 2o = suc 1o
4 limeq 6329 . . . 4 (2o = suc 1o → (Lim 2o ↔ Lim suc 1o))
53, 4ax-mp 5 . . 3 (Lim 2o ↔ Lim suc 1o)
62, 5sylnibr 328 . 2 (1o ∈ On → ¬ Lim 2o)
71, 6ax-mp 5 1 ¬ Lim 2o
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wb 205   = wceq 1541  wcel 2106  Oncon0 6317  Lim wlim 6318  suc csuc 6319  1oc1o 8405  2oc2o 8406
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2707  ax-sep 5256  ax-nul 5263  ax-pr 5384
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3or 1088  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-sb 2068  df-clab 2714  df-cleq 2728  df-clel 2814  df-ne 2944  df-ral 3065  df-rex 3074  df-rab 3408  df-v 3447  df-dif 3913  df-un 3915  df-in 3917  df-ss 3927  df-pss 3929  df-nul 4283  df-if 4487  df-pw 4562  df-sn 4587  df-pr 4589  df-op 4593  df-uni 4866  df-br 5106  df-opab 5168  df-tr 5223  df-eprel 5537  df-po 5545  df-so 5546  df-fr 5588  df-we 5590  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-1o 8412  df-2o 8413
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator