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| Mirrors > Home > MPE Home > Th. List > Mathboxes > nlim3 | Structured version Visualization version GIF version | ||
| Description: 3 is not a limit ordinal. (Contributed by RP, 13-Dec-2024.) |
| Ref | Expression |
|---|---|
| nlim3 | ⊢ ¬ Lim 3o |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2on 8408 | . 2 ⊢ 2o ∈ On | |
| 2 | nlimsuc 43885 | . . 3 ⊢ (2o ∈ On → ¬ Lim suc 2o) | |
| 3 | df-3o 8397 | . . . 4 ⊢ 3o = suc 2o | |
| 4 | limeq 6322 | . . . 4 ⊢ (3o = suc 2o → (Lim 3o ↔ Lim suc 2o)) | |
| 5 | 3, 4 | ax-mp 5 | . . 3 ⊢ (Lim 3o ↔ Lim suc 2o) |
| 6 | 2, 5 | sylnibr 330 | . 2 ⊢ (2o ∈ On → ¬ Lim 3o) |
| 7 | 1, 6 | ax-mp 5 | 1 ⊢ ¬ Lim 3o |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 207 = wceq 1547 ∈ wcel 2119 Oncon0 6310 Lim wlim 6311 suc csuc 6312 2oc2o 8389 3oc3o 8390 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-tr 5180 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-1o 8395 df-2o 8396 df-3o 8397 |
| This theorem is referenced by: (None) |
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