| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > lt0ne0d | Structured version Visualization version GIF version | ||
| Description: Something less than zero is not zero. Deduction form. (Contributed by David Moews, 28-Feb-2017.) |
| Ref | Expression |
|---|---|
| lt0ne0d.1 | ⊢ (𝜑 → 𝐴 < 0) |
| Ref | Expression |
|---|---|
| lt0ne0d | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lt0ne0d.1 | . 2 ⊢ (𝜑 → 𝐴 < 0) | |
| 2 | 0re 11132 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 3 | 2 | ltnri 11240 | . . . 4 ⊢ ¬ 0 < 0 |
| 4 | breq1 5099 | . . . 4 ⊢ (𝐴 = 0 → (𝐴 < 0 ↔ 0 < 0)) | |
| 5 | 3, 4 | mtbiri 327 | . . 3 ⊢ (𝐴 = 0 → ¬ 𝐴 < 0) |
| 6 | 5 | necon2ai 2959 | . 2 ⊢ (𝐴 < 0 → 𝐴 ≠ 0) |
| 7 | 1, 6 | syl 17 | 1 ⊢ (𝜑 → 𝐴 ≠ 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ≠ wne 2930 class class class wbr 5096 0cc0 11024 < clt 11164 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-resscn 11081 ax-1cn 11082 ax-addrcl 11085 ax-rnegex 11095 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-po 5530 df-so 5531 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-pnf 11166 df-mnf 11167 df-ltxr 11169 |
| This theorem is referenced by: nnne0 12177 mul2lt0rlt0 13007 mbfmulc2lem 25602 coseq00topi 26465 argimlt0 26576 atantan 26887 bcm1n 32824 sgnmul 32865 sgnsub 32867 sgn0bi 32870 sgnmulsgn 32872 cos9thpiminplylem1 33888 signsvfnn 34692 sn-nnne0 42657 sn-reclt0d 42678 mulltgt0d 42679 mullt0b1d 42680 mullt0b2d 42681 sn-mullt0d 42682 reclt0d 45573 requad1 47810 |
| Copyright terms: Public domain | W3C validator |