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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 11676 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 ≠ wne 2934 class class class wbr 5072 ℝcr 11028 0cc0 11029 < clt 11170 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-resscn 11086 ax-1cn 11087 ax-addrcl 11090 ax-rnegex 11100 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-po 5526 df-so 5527 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11172 df-mnf 11173 df-ltxr 11175 |
| This theorem is referenced by: eqneg 11866 recgt0ii 12053 nnne0i 12208 8th4div3 12388 halfpm6th 12390 5recm6rec 12778 0.999... 15837 bpoly2 16013 bpoly3 16014 fsumcube 16016 efi4p 16095 resin4p 16096 recos4p 16097 ef01bndlem 16142 cos2bnd 16146 sincos2sgn 16152 ene0 16167 pine0 26442 sinhalfpilem 26445 tan4thpi 26496 sincos6thpi 26498 sineq0 26506 coseq1 26507 efeq1 26510 cosne0 26511 efif1olem2 26525 efif1olem4 26527 eflogeq 26584 logf1o2 26632 cxpsqrt 26685 root1eq1 26737 sqrt2cxp2logb9e3 26781 ang180lem1 26791 ang180lem2 26792 ang180lem3 26793 2lgsoddprmlem1 27389 2lgsoddprmlem2 27390 chebbnd1lem3 27452 chebbnd1 27453 dp2cl 32958 dp2ltc 32965 dpfrac1 32970 dpmul4 32992 subfaclim 35416 bj-pinftynminfty 37587 taupilem1 37681 acos1half 42835 proot1ex 43641 coseq0 46307 sinaover2ne0 46311 wallispi 46513 stirlinglem3 46519 stirlinglem15 46531 dirkertrigeqlem2 46542 dirkertrigeqlem3 46543 dirkertrigeq 46544 dirkeritg 46545 dirkercncflem1 46546 fourierdlem24 46574 fourierdlem95 46644 fourierswlem 46673 goldrarr 47344 goldrasin 47345 goldrapos 47346 goldracos5teq 47348 |
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