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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 11773 | . 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 2145 ≠ wne 2955 class class class wbr 5103 ℝcr 11123 0cc0 11124 < clt 11267 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-resscn 11181 ax-1cn 11182 ax-addrcl 11185 ax-rnegex 11195 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11269 df-mnf 11270 df-ltxr 11272 |
| This theorem is used by: eqneg 11959 recgt0ii 12145 nnne0i 12300 8th4div3 12488 halfpm6th 12490 5recm6rec 12886 0.999... 15970 bpoly2 16143 bpoly3 16144 fsumcube 16146 efi4p 16225 resin4p 16226 recos4p 16227 ef01bndlem 16272 cos2bnd 16276 sincos2sgn 16282 ene0 16297 pine0 26698 sinhalfpilem 26701 tan4thpi 26752 sincos6thpi 26753 sineq0 26761 coseq1 26762 efeq1 26765 cosne0 26766 efif1olem2 26780 efif1olem4 26782 eflogeq 26839 logf1o2 26887 cxpsqrt 26940 root1eq1 26992 sqrt2cxp2logb9e3 27036 ang180lem1 27046 ang180lem2 27047 ang180lem3 27048 2lgsoddprmlem1 27644 2lgsoddprmlem2 27645 chebbnd1lem3 27707 chebbnd1 27708 dp2cl 33325 dp2ltc 33332 dpfrac1 33337 dpmul4 33359 subfaclim 35767 bj-pinftynminfty 37979 taupilem1 38073 acos1half 43233 proot1ex 44037 coseq0 46692 sinaover2ne0 46696 wallispi 46898 stirlinglem3 46904 stirlinglem15 46916 dirkertrigeqlem2 46927 dirkertrigeqlem3 46928 dirkertrigeq 46929 dirkeritg 46930 dirkercncflem1 46931 fourierdlem24 46959 fourierdlem95 47029 fourierswlem 47058 goldrarr 47746 goldrasin 47747 goldrapos 47748 goldracos5teq 47750 goldratmolem4 47753 |
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