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Mirrors > Home > ILE Home > Th. List > nn0ge0 | GIF version |
Description: A nonnegative integer is greater than or equal to zero. (Contributed by NM, 9-May-2004.) (Revised by Mario Carneiro, 16-May-2014.) |
Ref | Expression |
---|---|
nn0ge0 | ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elnn0 8972 | . 2 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
2 | nnre 8720 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ) | |
3 | nngt0 8738 | . . . 4 ⊢ (𝑁 ∈ ℕ → 0 < 𝑁) | |
4 | 0re 7759 | . . . . 5 ⊢ 0 ∈ ℝ | |
5 | ltle 7844 | . . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (0 < 𝑁 → 0 ≤ 𝑁)) | |
6 | 4, 5 | mpan 420 | . . . 4 ⊢ (𝑁 ∈ ℝ → (0 < 𝑁 → 0 ≤ 𝑁)) |
7 | 2, 3, 6 | sylc 62 | . . 3 ⊢ (𝑁 ∈ ℕ → 0 ≤ 𝑁) |
8 | 0le0 8802 | . . . 4 ⊢ 0 ≤ 0 | |
9 | breq2 3928 | . . . 4 ⊢ (𝑁 = 0 → (0 ≤ 𝑁 ↔ 0 ≤ 0)) | |
10 | 8, 9 | mpbiri 167 | . . 3 ⊢ (𝑁 = 0 → 0 ≤ 𝑁) |
11 | 7, 10 | jaoi 705 | . 2 ⊢ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) → 0 ≤ 𝑁) |
12 | 1, 11 | sylbi 120 | 1 ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∨ wo 697 = wceq 1331 ∈ wcel 1480 class class class wbr 3924 ℝcr 7612 0cc0 7613 < clt 7793 ≤ cle 7794 ℕcn 8713 ℕ0cn0 8970 |
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-1cn 7706 ax-1re 7707 ax-icn 7708 ax-addcl 7709 ax-addrcl 7710 ax-mulcl 7711 ax-i2m1 7718 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 df-n0 8971 |
This theorem is referenced by: nn0nlt0 8996 nn0ge0i 8997 nn0le0eq0 8998 nn0p1gt0 8999 0mnnnnn0 9002 nn0addge1 9016 nn0addge2 9017 nn0ge0d 9026 elnn0z 9060 nn0lt10b 9124 nn0ge0div 9131 nn0pnfge0 9570 xnn0xadd0 9643 0elfz 9891 fz0fzelfz0 9897 fz0fzdiffz0 9900 fzctr 9903 difelfzle 9904 elfzodifsumelfzo 9971 fvinim0ffz 10011 subfzo0 10012 adddivflid 10058 modqmuladdnn0 10134 modfzo0difsn 10161 uzennn 10202 bernneq 10405 bernneq3 10407 faclbnd 10480 faclbnd6 10483 facubnd 10484 bcval5 10502 fihashneq0 10534 dvdseq 11535 evennn02n 11568 nn0ehalf 11589 nn0oddm1d2 11595 gcdn0gt0 11655 nn0gcdid0 11658 absmulgcd 11694 algcvgblem 11719 algcvga 11721 lcmgcdnn 11752 hashgcdlem 11892 znnen 11900 |
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