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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 11764 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 ≠ wne 2960 class class class wbr 5111 ℝcr 11114 0cc0 11115 < clt 11258 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-resscn 11172 ax-1cn 11173 ax-addrcl 11176 ax-rnegex 11186 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11260 df-mnf 11261 df-ltxr 11263 |
| This theorem is used by: eqneg 11950 recgt0ii 12136 nnne0i 12291 8th4div3 12479 halfpm6th 12481 5recm6rec 12877 0.999... 15958 bpoly2 16133 bpoly3 16134 fsumcube 16136 efi4p 16215 resin4p 16216 recos4p 16217 ef01bndlem 16262 cos2bnd 16266 sincos2sgn 16272 ene0 16287 pine0 26676 sinhalfpilem 26679 tan4thpi 26730 sincos6thpi 26732 sineq0 26740 coseq1 26741 efeq1 26744 cosne0 26745 efif1olem2 26759 efif1olem4 26761 eflogeq 26818 logf1o2 26866 cxpsqrt 26919 root1eq1 26971 sqrt2cxp2logb9e3 27015 ang180lem1 27025 ang180lem2 27026 ang180lem3 27027 2lgsoddprmlem1 27623 2lgsoddprmlem2 27624 chebbnd1lem3 27686 chebbnd1 27687 dp2cl 33269 dp2ltc 33276 dpfrac1 33281 dpmul4 33303 subfaclim 35717 bj-pinftynminfty 37928 taupilem1 38022 acos1half 43177 proot1ex 43981 coseq0 46636 sinaover2ne0 46640 wallispi 46842 stirlinglem3 46848 stirlinglem15 46860 dirkertrigeqlem2 46871 dirkertrigeqlem3 46872 dirkertrigeq 46873 dirkeritg 46874 dirkercncflem1 46875 fourierdlem24 46903 fourierdlem95 46973 fourierswlem 47002 goldrarr 47676 goldrasin 47677 goldrapos 47678 goldracos5teq 47680 |
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