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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 8727 | . 2 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
2 | nnge1 8743 | . 2 ⊢ (𝐴 ∈ ℕ → 1 ≤ 𝐴) | |
3 | 0lt1 7889 | . . 3 ⊢ 0 < 1 | |
4 | 0re 7766 | . . . 4 ⊢ 0 ∈ ℝ | |
5 | 1re 7765 | . . . 4 ⊢ 1 ∈ ℝ | |
6 | ltletr 7853 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 1 ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((0 < 1 ∧ 1 ≤ 𝐴) → 0 < 𝐴)) | |
7 | 4, 5, 6 | mp3an12 1305 | . . 3 ⊢ (𝐴 ∈ ℝ → ((0 < 1 ∧ 1 ≤ 𝐴) → 0 < 𝐴)) |
8 | 3, 7 | mpani 426 | . 2 ⊢ (𝐴 ∈ ℝ → (1 ≤ 𝐴 → 0 < 𝐴)) |
9 | 1, 2, 8 | sylc 62 | 1 ⊢ (𝐴 ∈ ℕ → 0 < 𝐴) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∈ wcel 1480 class class class wbr 3929 ℝcr 7619 0cc0 7620 1c1 7621 < clt 7800 ≤ cle 7801 ℕcn 8720 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-cnex 7711 ax-resscn 7712 ax-1re 7714 ax-addrcl 7717 ax-0lt1 7726 ax-0id 7728 ax-rnegex 7729 ax-pre-ltirr 7732 ax-pre-ltwlin 7733 ax-pre-lttrn 7734 ax-pre-ltadd 7736 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-rab 2425 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-xp 4545 df-cnv 4547 df-iota 5088 df-fv 5131 df-ov 5777 df-pnf 7802 df-mnf 7803 df-xr 7804 df-ltxr 7805 df-le 7806 df-inn 8721 |
This theorem is referenced by: nnap0 8749 nngt0i 8750 nn2ge 8753 nn1gt1 8754 nnsub 8759 nngt0d 8764 nnrecl 8975 nn0ge0 9002 0mnnnnn0 9009 elnnnn0b 9021 elnnz 9064 elnn0z 9067 ztri3or0 9096 nnm1ge0 9137 gtndiv 9146 nnrp 9451 nnledivrp 9553 fzo1fzo0n0 9960 ubmelfzo 9977 adddivflid 10065 flltdivnn0lt 10077 intfracq 10093 zmodcl 10117 zmodfz 10119 zmodid2 10125 m1modnnsub1 10143 expnnval 10296 nnlesq 10396 facdiv 10484 faclbnd 10487 bc0k 10502 dvdsval3 11497 nndivdvds 11499 moddvds 11502 evennn2n 11580 nnoddm1d2 11607 divalglemnn 11615 ndvdssub 11627 ndvdsadd 11628 modgcd 11679 sqgcd 11717 lcmgcdlem 11758 qredeu 11778 divdenle 11875 hashgcdlem 11903 znnen 11911 exmidunben 11939 |
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