| 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 7874 | . 2 ⊢ Lim ω | |
| 2 | limsuc 7841 | . 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 209 ∈ wcel 2149 Lim wlim 6358 suc csuc 6359 ωcom 7858 |
| 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 5258 ax-nul 5268 ax-pr 5402 ax-un 7730 |
| 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 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-opab 5175 df-tr 5220 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-om 7859 |
| This theorem is referenced by: nnsuc 7876 peano2 7882 peano5 7886 frsuc 8420 frsucmptn 8422 nnaordi 8600 nnmsucr 8607 omsmolem 8639 php 9187 php4 9190 unblem1 9248 isfinite2 9254 inf0 9586 inf3lem1 9593 inf3lem5 9597 cantnfp1lem3 9645 cantnflem1 9654 itunisuc 10399 ituniiun 10402 indpi 10888 constrllcllem 34083 constrlccllem 34084 constrcccllem 34085 rdgeqoa 37899 |
| Copyright terms: Public domain | W3C validator |