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| Mirrors > Home > MPE Home > Th. List > halfgt0 | Structured version Visualization version GIF version | ||
| Description: One-half is greater than zero. (Contributed by NM, 24-Feb-2005.) |
| Ref | Expression |
|---|---|
| halfgt0 | ⊢ 0 < (1 / 2) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2re 12208 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 2pos 12237 | . 2 ⊢ 0 < 2 | |
| 3 | 1, 2 | recgt0ii 12037 | 1 ⊢ 0 < (1 / 2) |
| Colors of variables: wff setvar class |
| Syntax hints: class class class wbr 5095 (class class class)co 7354 0cc0 11015 1c1 11016 < clt 11155 / cdiv 11783 2c2 12189 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-po 5529 df-so 5530 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-er 8630 df-en 8878 df-dom 8879 df-sdom 8880 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-div 11784 df-2 12197 |
| This theorem is referenced by: halfge0 12346 geo2sum 15784 oddge22np1 16264 ltoddhalfle 16276 halfleoddlt 16277 itg2monolem3 25683 aaliou3lem1 26280 aaliou3lem2 26281 aaliou3lem3 26282 cxpsqrtlem 26641 cxpsqrt 26642 chordthmlem4 26775 asinsin 26832 gausslemma2dlem1a 27306 chtppilim 27416 dnizeq0 36542 dnizphlfeqhlf 36543 cnndvlem1 36604 cntotbnd 37859 tan3rdpi 42473 halffl 45424 stoweidlem5 46130 stoweidlem28 46153 fourierdlem103 46334 fourierdlem104 46335 ceilhalf1 47461 |
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