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| Mirrors > Home > MPE Home > Th. List > gt0ne0ii | Structured version Visualization version GIF version | ||
| Description: Positive implies nonzero. (Contributed by NM, 15-May-1999.) |
| Ref | Expression |
|---|---|
| lt2.1 | ⊢ 𝐴 ∈ ℝ |
| gt0ne0i.2 | ⊢ 0 < 𝐴 |
| Ref | Expression |
|---|---|
| gt0ne0ii | ⊢ 𝐴 ≠ 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | gt0ne0i.2 | . 2 ⊢ 0 < 𝐴 | |
| 2 | lt2.1 | . . 3 ⊢ 𝐴 ∈ ℝ | |
| 3 | 2 | gt0ne0i 11744 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 ≠ wne 2958 class class class wbr 5109 ℝcr 11094 0cc0 11095 < clt 11238 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-resscn 11152 ax-1cn 11153 ax-addrcl 11156 ax-rnegex 11166 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-po 5569 df-so 5570 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11240 df-mnf 11241 df-ltxr 11243 |
| This theorem is referenced by: eqneg 11930 recgt0ii 12116 nnne0i 12271 8th4div3 12459 halfpm6th 12461 5recm6rec 12856 0.999... 15931 bpoly2 16106 bpoly3 16107 fsumcube 16109 efi4p 16188 resin4p 16189 recos4p 16190 ef01bndlem 16235 cos2bnd 16239 sincos2sgn 16245 ene0 16260 pine0 26625 sinhalfpilem 26628 tan4thpi 26679 sincos6thpi 26681 sineq0 26689 coseq1 26690 efeq1 26693 cosne0 26694 efif1olem2 26708 efif1olem4 26710 eflogeq 26767 logf1o2 26815 cxpsqrt 26868 root1eq1 26920 sqrt2cxp2logb9e3 26964 ang180lem1 26974 ang180lem2 26975 ang180lem3 26976 2lgsoddprmlem1 27572 2lgsoddprmlem2 27573 chebbnd1lem3 27635 chebbnd1 27636 dp2cl 33199 dp2ltc 33206 dpfrac1 33211 dpmul4 33233 subfaclim 35680 bj-pinftynminfty 37871 taupilem1 37965 acos1half 43119 proot1ex 43923 coseq0 46578 sinaover2ne0 46582 wallispi 46784 stirlinglem3 46790 stirlinglem15 46802 dirkertrigeqlem2 46813 dirkertrigeqlem3 46814 dirkertrigeq 46815 dirkeritg 46816 dirkercncflem1 46817 fourierdlem24 46845 fourierdlem95 46915 fourierswlem 46944 goldrarr 47618 goldrasin 47619 goldrapos 47620 goldracos5teq 47622 |
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