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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 11716 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2141 ≠ wne 2956 class class class wbr 5097 ℝcr 11066 0cc0 11067 < clt 11210 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 ax-resscn 11124 ax-1cn 11125 ax-addrcl 11128 ax-rnegex 11138 ax-cnre 11140 ax-pre-lttri 11141 ax-pre-lttrn 11142 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-po 5551 df-so 5552 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-er 8672 df-en 8922 df-dom 8923 df-sdom 8924 df-pnf 11212 df-mnf 11213 df-ltxr 11215 |
| This theorem is referenced by: eqneg 11905 recgt0ii 12092 nnne0i 12247 8th4div3 12435 halfpm6th 12437 5recm6rec 12832 0.999... 15902 bpoly2 16078 bpoly3 16079 fsumcube 16081 efi4p 16160 resin4p 16161 recos4p 16162 ef01bndlem 16207 cos2bnd 16211 sincos2sgn 16217 ene0 16232 pine0 26513 sinhalfpilem 26516 tan4thpi 26567 sincos6thpi 26569 sineq0 26577 coseq1 26578 efeq1 26581 cosne0 26582 efif1olem2 26596 efif1olem4 26598 eflogeq 26655 logf1o2 26703 cxpsqrt 26756 root1eq1 26808 sqrt2cxp2logb9e3 26852 ang180lem1 26862 ang180lem2 26863 ang180lem3 26864 2lgsoddprmlem1 27460 2lgsoddprmlem2 27461 chebbnd1lem3 27523 chebbnd1 27524 dp2cl 33018 dp2ltc 33025 dpfrac1 33030 dpmul4 33052 subfaclim 35499 bj-pinftynminfty 37680 taupilem1 37774 acos1half 42928 proot1ex 43734 coseq0 46399 sinaover2ne0 46403 wallispi 46605 stirlinglem3 46611 stirlinglem15 46623 dirkertrigeqlem2 46634 dirkertrigeqlem3 46635 dirkertrigeq 46636 dirkeritg 46637 dirkercncflem1 46638 fourierdlem24 46666 fourierdlem95 46736 fourierswlem 46765 goldrarr 47436 goldrasin 47437 goldrapos 47438 goldracos5teq 47440 |
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