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Mirrors > Home > ILE Home > Th. List > nngt0 | GIF version |
Description: A positive integer is positive. (Contributed by NM, 26-Sep-1999.) |
Ref | Expression |
---|---|
nngt0 | ⊢ (𝐴 ∈ ℕ → 0 < 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnre 8046 | . 2 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
2 | nnge1 8062 | . 2 ⊢ (𝐴 ∈ ℕ → 1 ≤ 𝐴) | |
3 | 0lt1 7236 | . . 3 ⊢ 0 < 1 | |
4 | 0re 7119 | . . . 4 ⊢ 0 ∈ ℝ | |
5 | 1re 7118 | . . . 4 ⊢ 1 ∈ ℝ | |
6 | ltletr 7200 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 1 ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((0 < 1 ∧ 1 ≤ 𝐴) → 0 < 𝐴)) | |
7 | 4, 5, 6 | mp3an12 1258 | . . 3 ⊢ (𝐴 ∈ ℝ → ((0 < 1 ∧ 1 ≤ 𝐴) → 0 < 𝐴)) |
8 | 3, 7 | mpani 420 | . 2 ⊢ (𝐴 ∈ ℝ → (1 ≤ 𝐴 → 0 < 𝐴)) |
9 | 1, 2, 8 | sylc 61 | 1 ⊢ (𝐴 ∈ ℕ → 0 < 𝐴) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 102 ∈ wcel 1433 class class class wbr 3785 ℝcr 6980 0cc0 6981 1c1 6982 < clt 7153 ≤ cle 7154 ℕcn 8039 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 576 ax-in2 577 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-13 1444 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 ax-un 4188 ax-setind 4280 ax-cnex 7067 ax-resscn 7068 ax-1re 7070 ax-addrcl 7073 ax-0lt1 7082 ax-0id 7084 ax-rnegex 7085 ax-pre-ltirr 7088 ax-pre-ltwlin 7089 ax-pre-lttrn 7090 ax-pre-ltadd 7092 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-fal 1290 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ne 2246 df-nel 2340 df-ral 2353 df-rex 2354 df-rab 2357 df-v 2603 df-dif 2975 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-uni 3602 df-int 3637 df-br 3786 df-opab 3840 df-xp 4369 df-cnv 4371 df-iota 4887 df-fv 4930 df-ov 5535 df-pnf 7155 df-mnf 7156 df-xr 7157 df-ltxr 7158 df-le 7159 df-inn 8040 |
This theorem is referenced by: nnap0 8068 nngt0i 8069 nn2ge 8071 nn1gt1 8072 nnsub 8077 nngt0d 8082 nnrecl 8286 nn0ge0 8313 0mnnnnn0 8320 elnnnn0b 8332 elnnz 8361 elnn0z 8364 ztri3or0 8393 nnm1ge0 8433 gtndiv 8442 nnrp 8743 nnledivrp 8837 fzo1fzo0n0 9192 ubmelfzo 9209 adddivflid 9294 flltdivnn0lt 9306 intfracq 9322 zmodcl 9346 zmodfz 9348 zmodid2 9354 m1modnnsub1 9372 expinnval 9479 nnlesq 9578 facdiv 9665 faclbnd 9668 bc0k 9683 dvdsval3 10199 nndivdvds 10201 moddvds 10204 evennn2n 10283 nnoddm1d2 10310 divalglemnn 10318 ndvdssub 10330 ndvdsadd 10331 modgcd 10382 sqgcd 10418 lcmgcdlem 10459 qredeu 10479 |
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