| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > nnne0 | GIF version | ||
| Description: A positive integer is nonzero. (Contributed by NM, 27-Sep-1999.) |
| Ref | Expression |
|---|---|
| nnne0 | ⊢ (𝐴 ∈ ℕ → 𝐴 ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0nnn 9148 | . . 3 ⊢ ¬ 0 ∈ ℕ | |
| 2 | eleq1 2292 | . . 3 ⊢ (𝐴 = 0 → (𝐴 ∈ ℕ ↔ 0 ∈ ℕ)) | |
| 3 | 1, 2 | mtbiri 679 | . 2 ⊢ (𝐴 = 0 → ¬ 𝐴 ∈ ℕ) |
| 4 | 3 | necon2ai 2454 | 1 ⊢ (𝐴 ∈ ℕ → 𝐴 ≠ 0) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ≠ wne 2400 0cc0 8010 ℕcn 9121 |
| 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 8101 ax-resscn 8102 ax-1re 8104 ax-addrcl 8107 ax-0lt1 8116 ax-0id 8118 ax-rnegex 8119 ax-pre-ltirr 8122 ax-pre-lttrn 8124 ax-pre-ltadd 8126 |
| 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 6010 df-pnf 8194 df-mnf 8195 df-xr 8196 df-ltxr 8197 df-le 8198 df-inn 9122 |
| This theorem is referenced by: nnne0d 9166 divfnzn 9828 qreccl 9849 fzo1fzo0n0 10395 expnnval 10776 expnegap0 10781 hashnncl 11029 ef0lem 12186 dvdsval3 12317 nndivdvds 12322 modmulconst 12349 dvdsdivcl 12376 divalg2 12452 ndvdssub 12456 nndvdslegcd 12501 divgcdz 12507 divgcdnn 12511 gcdzeq 12558 eucalgf 12592 eucalginv 12593 lcmgcdlem 12614 qredeu 12634 cncongr1 12640 cncongr2 12641 divnumden 12733 divdenle 12734 phimullem 12762 hashgcdlem 12775 phisum 12778 prm23lt5 12801 pythagtriplem8 12810 pythagtriplem9 12811 pceu 12833 pccl 12837 pcdiv 12840 pcqcl 12844 pcdvds 12853 pcndvds 12855 pcndvds2 12857 pceq0 12860 pcz 12870 pcmpt 12881 fldivp1 12886 pcfac 12888 ennnfonelemjn 12988 mulgnn 13678 mulgnegnn 13684 znf1o 14630 znfi 14634 znhash 14635 znidomb 14637 znrrg 14639 dvexp2 15401 lgsval4a 15716 lgsabs1 15733 lgssq2 15735 |
| Copyright terms: Public domain | W3C validator |