| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > peano2b | Structured version Visualization version GIF version | ||
| Description: A class belongs to omega iff its successor does. (Contributed by NM, 3-Dec-1995.) |
| Ref | Expression |
|---|---|
| peano2b | ⊢ (𝐴 ∈ ω ↔ suc 𝐴 ∈ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limom 7834 | . 2 ⊢ Lim ω | |
| 2 | limsuc 7801 | . 2 ⊢ (Lim ω → (𝐴 ∈ ω ↔ suc 𝐴 ∈ ω)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ∈ ω ↔ suc 𝐴 ∈ ω) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∈ wcel 2114 Lim wlim 6326 suc csuc 6327 ωcom 7818 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-om 7819 |
| This theorem is referenced by: nnsuc 7836 peano2 7842 peano5 7845 frsuc 8378 frsucmptn 8380 nnaordi 8556 nnmsucr 8563 omsmolem 8595 php 9143 php4 9146 unblem1 9204 isfinite2 9210 inf0 9542 inf3lem1 9549 inf3lem5 9553 cantnfp1lem3 9601 cantnflem1 9610 itunisuc 10341 ituniiun 10344 indpi 10830 constrllcllem 33929 constrlccllem 33930 constrcccllem 33931 rdgeqoa 37622 |
| Copyright terms: Public domain | W3C validator |