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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 11858 | . 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 2144 ≠ wne 2955 class class class wbr 5102 ℝcr 11206 0cc0 11207 < clt 11350 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-resscn 11264 ax-1cn 11265 ax-addrcl 11268 ax-rnegex 11278 ax-cnre 11280 ax-pre-lttri 11281 ax-pre-lttrn 11282 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-er 8724 df-en 8981 df-dom 8982 df-sdom 8983 df-pnf 11352 df-mnf 11353 df-ltxr 11355 |
| This theorem is used by: eqneg 12044 recgt0ii 12230 nnne0i 12385 8th4div3 12573 halfpm6th 12575 5recm6rec 12971 0.999... 16059 bpoly2 16232 bpoly3 16233 fsumcube 16235 efi4p 16314 resin4p 16315 recos4p 16316 ef01bndlem 16361 cos2bnd 16365 sincos2sgn 16371 ene0 16386 pine0 26798 sinhalfpilem 26801 tan4thpi 26852 sincos6thpi 26853 sineq0 26861 coseq1 26862 cosne0 26866 efif1olem2 26880 efif1olem4 26882 eflogeq 26939 logf1o2 26987 cxpsqrt 27040 root1eq1 27092 sqrt2cxp2logb9e3 27136 ang180lem1 27146 ang180lem2 27147 2lgsoddprmlem1 27744 2lgsoddprmlem2 27745 chebbnd1lem3 27807 chebbnd1 27808 dp2cl 33496 dp2ltc 33503 dpfrac1 33508 dpmul4 33530 subfaclim 36043 bj-pinftynminfty 38257 taupilem1 38351 acos1half 43518 proot1ex 44307 coseq0 46982 sinaover2ne0 46986 wallispi 47188 stirlinglem3 47194 stirlinglem15 47206 dirkertrigeqlem2 47217 dirkertrigeqlem3 47218 dirkertrigeq 47219 dirkeritg 47220 dirkercncflem1 47221 fourierdlem24 47249 fourierdlem95 47319 fourierswlem 47348 goldrarr 48036 goldrasin 48037 goldrapos 48038 goldracos5teq 48040 goldratmolem4 48043 |
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