| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nlim0 | Structured version Visualization version GIF version | ||
| Description: The empty set is not a limit ordinal. (Contributed by NM, 24-Mar-1995.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
| Ref | Expression |
|---|---|
| nlim0 | ⊢ ¬ Lim ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | noel 4299 | . . 3 ⊢ ¬ ∅ ∈ ∅ | |
| 2 | simp2 1153 | . . 3 ⊢ ((Ord ∅ ∧ ∅ ∈ ∅ ∧ ∅ = ∪ ∅) → ∅ ∈ ∅) | |
| 3 | 1, 2 | mto 200 | . 2 ⊢ ¬ (Ord ∅ ∧ ∅ ∈ ∅ ∧ ∅ = ∪ ∅) |
| 4 | dflim2 6420 | . 2 ⊢ (Lim ∅ ↔ (Ord ∅ ∧ ∅ ∈ ∅ ∧ ∅ = ∪ ∅)) | |
| 5 | 3, 4 | mtbir 326 | 1 ⊢ ¬ Lim ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∧ w3a 1101 = wceq 1567 ∈ wcel 2149 ∅c0 4294 ∪ cuni 4876 Ord word 6360 Lim wlim 6362 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-tr 5223 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-ord 6364 df-lim 6366 |
| This theorem is referenced by: tz7.44lem1 8391 tz7.44-3 8394 1ellim 8482 2ellim 8483 cflim2 10246 rankcf 10761 dfrdg4 36341 limsucncmpi 36844 onov0suclim 43892 |
| Copyright terms: Public domain | W3C validator |