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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 11164 | . 2 ⊢ (0 < 𝐴 → 𝐴 ≠ 0) |
4 | 1, 3 | ax-mp 5 | 1 ⊢ 𝐴 ≠ 0 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2111 ≠ wne 2987 class class class wbr 5030 ℝcr 10525 0cc0 10526 < clt 10664 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-resscn 10583 ax-1cn 10584 ax-addrcl 10587 ax-rnegex 10597 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-po 5438 df-so 5439 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-pnf 10666 df-mnf 10667 df-ltxr 10669 |
This theorem is referenced by: eqneg 11349 recgt0ii 11535 nnne0i 11665 2ne0 11729 3ne0 11731 4ne0 11733 8th4div3 11845 halfpm6th 11846 5recm6rec 12230 0.999... 15229 bpoly2 15403 bpoly3 15404 fsumcube 15406 efi4p 15482 resin4p 15483 recos4p 15484 ef01bndlem 15529 cos2bnd 15533 sincos2sgn 15539 ene0 15554 sinhalfpilem 25056 sincos6thpi 25108 sineq0 25116 coseq1 25117 efeq1 25120 cosne0 25121 efif1olem2 25135 efif1olem4 25137 eflogeq 25193 logf1o2 25241 cxpsqrt 25294 root1eq1 25344 sqrt2cxp2logb9e3 25385 ang180lem1 25395 ang180lem2 25396 ang180lem3 25397 2lgsoddprmlem1 25992 2lgsoddprmlem2 25993 chebbnd1lem3 26055 chebbnd1 26056 dp2cl 30582 dp2ltc 30589 dpfrac1 30594 dpmul4 30616 subfaclim 32548 bj-pinftynminfty 34642 taupilem1 34735 proot1ex 40145 coseq0 42506 sinaover2ne0 42510 wallispi 42712 stirlinglem3 42718 stirlinglem15 42730 dirkertrigeqlem2 42741 dirkertrigeqlem3 42742 dirkertrigeq 42743 dirkeritg 42744 dirkercncflem1 42745 fourierdlem24 42773 fourierdlem95 42843 fourierswlem 42872 |
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