| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 0nnn | GIF version | ||
| Description: Zero is not a positive integer. (Contributed by NM, 25-Aug-1999.) |
| Ref | Expression |
|---|---|
| 0nnn | ⊢ ¬ 0 ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0lt1 8273 | . 2 ⊢ 0 < 1 | |
| 2 | nnnlt1 9136 | . 2 ⊢ (0 ∈ ℕ → ¬ 0 < 1) | |
| 3 | 1, 2 | mt2 643 | 1 ⊢ ¬ 0 ∈ ℕ |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∈ wcel 2200 class class class wbr 4083 0cc0 7999 1c1 8000 < clt 8181 ℕcn 9110 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8090 ax-resscn 8091 ax-1re 8093 ax-addrcl 8096 ax-0lt1 8105 ax-0id 8107 ax-rnegex 8108 ax-pre-ltirr 8111 ax-pre-lttrn 8113 ax-pre-ltadd 8115 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-opab 4146 df-xp 4725 df-cnv 4727 df-iota 5278 df-fv 5326 df-ov 6004 df-pnf 8183 df-mnf 8184 df-xr 8185 df-ltxr 8186 df-le 8187 df-inn 9111 |
| This theorem is referenced by: nnne0 9138 dfn2 9382 nn0enne 12413 exprmfct 12660 coprm 12666 fczpsrbag 14635 |
| Copyright terms: Public domain | W3C validator |