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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 11685 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
| 4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ≠ wne 2932 class class class wbr 5085 ℝcr 11037 0cc0 11038 < clt 11179 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-addrcl 11099 ax-rnegex 11109 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-ltxr 11184 |
| This theorem is referenced by: eqneg 11875 recgt0ii 12062 nnne0i 12217 8th4div3 12397 halfpm6th 12399 5recm6rec 12787 0.999... 15846 bpoly2 16022 bpoly3 16023 fsumcube 16025 efi4p 16104 resin4p 16105 recos4p 16106 ef01bndlem 16151 cos2bnd 16155 sincos2sgn 16161 ene0 16176 pine0 26424 sinhalfpilem 26427 tan4thpi 26478 sincos6thpi 26480 sineq0 26488 coseq1 26489 efeq1 26492 cosne0 26493 efif1olem2 26507 efif1olem4 26509 eflogeq 26566 logf1o2 26614 cxpsqrt 26667 root1eq1 26719 sqrt2cxp2logb9e3 26763 ang180lem1 26773 ang180lem2 26774 ang180lem3 26775 2lgsoddprmlem1 27371 2lgsoddprmlem2 27372 chebbnd1lem3 27434 chebbnd1 27435 dp2cl 32939 dp2ltc 32946 dpfrac1 32951 dpmul4 32973 subfaclim 35370 bj-pinftynminfty 37541 taupilem1 37635 acos1half 42790 proot1ex 43624 coseq0 46292 sinaover2ne0 46296 wallispi 46498 stirlinglem3 46504 stirlinglem15 46516 dirkertrigeqlem2 46527 dirkertrigeqlem3 46528 dirkertrigeq 46529 dirkeritg 46530 dirkercncflem1 46531 fourierdlem24 46559 fourierdlem95 46629 fourierswlem 46658 goldrarr 47329 goldrasin 47330 goldrapos 47331 goldracos5teq 47333 |
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