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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 11748 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 ≠ wne 2964 class class class wbr 5113 ℝcr 11098 0cc0 11099 < clt 11242 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-resscn 11156 ax-1cn 11157 ax-addrcl 11160 ax-rnegex 11170 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-po 5570 df-so 5571 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-pnf 11244 df-mnf 11245 df-ltxr 11247 |
| This theorem is referenced by: eqneg 11934 recgt0ii 12120 nnne0i 12275 8th4div3 12463 halfpm6th 12465 5recm6rec 12860 0.999... 15934 bpoly2 16110 bpoly3 16111 fsumcube 16113 efi4p 16192 resin4p 16193 recos4p 16194 ef01bndlem 16239 cos2bnd 16243 sincos2sgn 16249 ene0 16264 pine0 26590 sinhalfpilem 26593 tan4thpi 26644 sincos6thpi 26646 sineq0 26654 coseq1 26655 efeq1 26658 cosne0 26659 efif1olem2 26673 efif1olem4 26675 eflogeq 26732 logf1o2 26780 cxpsqrt 26833 root1eq1 26885 sqrt2cxp2logb9e3 26929 ang180lem1 26939 ang180lem2 26940 ang180lem3 26941 2lgsoddprmlem1 27537 2lgsoddprmlem2 27538 chebbnd1lem3 27600 chebbnd1 27601 dp2cl 33139 dp2ltc 33146 dpfrac1 33151 dpmul4 33173 subfaclim 35578 bj-pinftynminfty 37758 taupilem1 37852 acos1half 43008 proot1ex 43814 coseq0 46469 sinaover2ne0 46473 wallispi 46675 stirlinglem3 46681 stirlinglem15 46693 dirkertrigeqlem2 46704 dirkertrigeqlem3 46705 dirkertrigeq 46706 dirkeritg 46707 dirkercncflem1 46708 fourierdlem24 46736 fourierdlem95 46806 fourierswlem 46835 goldrarr 47506 goldrasin 47507 goldrapos 47508 goldracos5teq 47510 |
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