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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 8720 | . 2 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
2 | nnge1 8736 | . 2 ⊢ (𝐴 ∈ ℕ → 1 ≤ 𝐴) | |
3 | 0lt1 7882 | . . 3 ⊢ 0 < 1 | |
4 | 0re 7759 | . . . 4 ⊢ 0 ∈ ℝ | |
5 | 1re 7758 | . . . 4 ⊢ 1 ∈ ℝ | |
6 | ltletr 7846 | . . . 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 3924 ℝcr 7612 0cc0 7613 1c1 7614 < clt 7793 ≤ cle 7794 ℕcn 8713 |
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 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-setind 4447 ax-cnex 7704 ax-resscn 7705 ax-1re 7707 ax-addrcl 7710 ax-0lt1 7719 ax-0id 7721 ax-rnegex 7722 ax-pre-ltirr 7725 ax-pre-ltwlin 7726 ax-pre-lttrn 7727 ax-pre-ltadd 7729 |
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 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-rex 2420 df-rab 2423 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-int 3767 df-br 3925 df-opab 3985 df-xp 4540 df-cnv 4542 df-iota 5083 df-fv 5126 df-ov 5770 df-pnf 7795 df-mnf 7796 df-xr 7797 df-ltxr 7798 df-le 7799 df-inn 8714 |
This theorem is referenced by: nnap0 8742 nngt0i 8743 nn2ge 8746 nn1gt1 8747 nnsub 8752 nngt0d 8757 nnrecl 8968 nn0ge0 8995 0mnnnnn0 9002 elnnnn0b 9014 elnnz 9057 elnn0z 9060 ztri3or0 9089 nnm1ge0 9130 gtndiv 9139 nnrp 9444 nnledivrp 9546 fzo1fzo0n0 9953 ubmelfzo 9970 adddivflid 10058 flltdivnn0lt 10070 intfracq 10086 zmodcl 10110 zmodfz 10112 zmodid2 10118 m1modnnsub1 10136 expnnval 10289 nnlesq 10389 facdiv 10477 faclbnd 10480 bc0k 10495 dvdsval3 11486 nndivdvds 11488 moddvds 11491 evennn2n 11569 nnoddm1d2 11596 divalglemnn 11604 ndvdssub 11616 ndvdsadd 11617 modgcd 11668 sqgcd 11706 lcmgcdlem 11747 qredeu 11767 divdenle 11864 hashgcdlem 11892 znnen 11900 exmidunben 11928 |
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