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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 10646 | . 2 ⊢ (𝐴 ∈ ℝ → 0 ∈ ℝ) | |
2 | ltne 10739 | . 2 ⊢ ((0 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) | |
3 | 1, 2 | sylan 582 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2114 ≠ wne 3018 class class class wbr 5068 ℝcr 10538 0cc0 10539 < clt 10677 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-resscn 10596 ax-1cn 10597 ax-addrcl 10600 ax-rnegex 10610 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-po 5476 df-so 5477 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-ltxr 10682 |
This theorem is referenced by: recgt0 11488 lemul1 11494 lediv1 11507 gt0div 11508 ge0div 11509 mulge0b 11512 ltdivmul 11517 ledivmul 11518 lt2mul2div 11520 lemuldiv 11522 ltdiv2 11528 ltrec1 11529 lerec2 11530 ledivdiv 11531 lediv2 11532 ltdiv23 11533 lediv23 11534 lediv12a 11535 recreclt 11541 nnrecl 11898 elnnz 11994 recnz 12060 rpne0 12408 divelunit 12883 resqrex 14612 sqrtgt0 14620 argregt0 25195 argimgt0 25197 logneg2 25200 logcnlem3 25229 atanlogsublem 25495 leopmul 29913 cdj1i 30212 lediv2aALT 32922 nndivlub 33808 knoppndvlem15 33867 knoppndvlem17 33869 sineq0ALT 41278 eenglngeehlnmlem1 44731 eenglngeehlnmlem2 44732 |
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