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Mirrors > Home > MPE Home > Th. List > gt0ne0 | Structured version Visualization version GIF version |
Description: Positive implies nonzero. (Contributed by NM, 3-Oct-1999.) (Proof shortened by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
gt0ne0 | ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0red 10633 | . 2 ⊢ (𝐴 ∈ ℝ → 0 ∈ ℝ) | |
2 | ltne 10726 | . 2 ⊢ ((0 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) | |
3 | 1, 2 | sylan 583 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2111 ≠ wne 2987 class class class wbr 5030 ℝcr 10525 0cc0 10526 < clt 10664 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-resscn 10583 ax-1cn 10584 ax-addrcl 10587 ax-rnegex 10597 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-po 5438 df-so 5439 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-pnf 10666 df-mnf 10667 df-ltxr 10669 |
This theorem is referenced by: recgt0 11475 lemul1 11481 lediv1 11494 gt0div 11495 ge0div 11496 mulge0b 11499 ltdivmul 11504 ledivmul 11505 lt2mul2div 11507 lemuldiv 11509 ltdiv2 11515 ltrec1 11516 lerec2 11517 ledivdiv 11518 lediv2 11519 ltdiv23 11520 lediv23 11521 lediv12a 11522 recreclt 11528 nnrecl 11883 elnnz 11979 recnz 12045 rpne0 12393 divelunit 12872 resqrex 14602 sqrtgt0 14610 argregt0 25201 argimgt0 25203 logneg2 25206 logcnlem3 25235 atanlogsublem 25501 leopmul 29917 cdj1i 30216 lediv2aALT 33033 nndivlub 33919 knoppndvlem15 33978 knoppndvlem17 33980 sineq0ALT 41643 eenglngeehlnmlem1 45151 eenglngeehlnmlem2 45152 |
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