| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > elnn | Structured version Visualization version GIF version | ||
| Description: A member of a natural number is a natural number. (Contributed by NM, 21-Jun-1998.) |
| Ref | Expression |
|---|---|
| elnn | ⊢ ((𝐴 ∈ 𝐵 ∧ 𝐵 ∈ ω) → 𝐴 ∈ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | trom 7827 | . 2 ⊢ Tr ω | |
| 2 | trel 5215 | . 2 ⊢ (Tr ω → ((𝐴 ∈ 𝐵 ∧ 𝐵 ∈ ω) → 𝐴 ∈ ω)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝐵 ∈ ω) → 𝐴 ∈ ω) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 Tr wtr 5207 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-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 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-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 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-om 7819 |
| This theorem is referenced by: nnaordi 8556 nnmordi 8569 pssnn 9105 ssnnfi 9106 unfilem1 9217 unfilem2 9218 inf3lem5 9553 cantnflt 9593 cantnfp1lem3 9601 cantnflem1d 9609 cantnflem1 9610 cnfcomlem 9620 cnfcom 9621 ttrcltr 9637 ttrclselem2 9647 infpssrlem4 10228 axdc3lem2 10373 pwfseqlem3 10583 oldfi 27922 n0bday 28360 onltn0s 28366 bnj1098 34959 bnj517 35060 bnj594 35087 bnj1001 35134 bnj1118 35159 bnj1128 35165 bnj1145 35168 fineqvnttrclselem2 35297 fineqvnttrclselem3 35298 elhf2 36388 hfelhf 36394 |
| Copyright terms: Public domain | W3C validator |