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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 12253 | . 2 ⊢ 2 ∈ ℝ | |
| 2 | 2pos 12282 | . 2 ⊢ 0 < 2 | |
| 3 | 1, 2 | recgt0ii 12060 | 1 ⊢ 0 < (1 / 2) |
| Colors of variables: wff setvar class |
| Syntax hints: class class class wbr 5079 (class class class)co 7363 0cc0 11036 1c1 11037 < clt 11177 / cdiv 11805 2c2 12234 |
| 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 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 |
| 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 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-div 11806 df-2 12242 |
| This theorem is referenced by: halfge0 12391 geo2sum 15836 oddge22np1 16316 ltoddhalfle 16328 halfleoddlt 16329 itg2monolem3 25744 aaliou3lem1 26333 aaliou3lem2 26334 aaliou3lem3 26335 cxpsqrtlem 26691 cxpsqrt 26692 chordthmlem4 26824 asinsin 26881 gausslemma2dlem1a 27353 chtppilim 27463 dnizeq0 36788 dnizphlfeqhlf 36789 cnndvlem1 36850 cntotbnd 38170 tan3rdpi 42836 halffl 45751 stoweidlem5 46455 stoweidlem28 46478 fourierdlem103 46659 fourierdlem104 46660 ceilhalf1 47808 |
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