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Mirrors > Home > MPE Home > Th. List > halfge0 | Structured version Visualization version GIF version |
Description: One-half is not negative. (Contributed by AV, 7-Jun-2020.) |
Ref | Expression |
---|---|
halfge0 | ⊢ 0 ≤ (1 / 2) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0re 10721 | . 2 ⊢ 0 ∈ ℝ | |
2 | halfre 11930 | . 2 ⊢ (1 / 2) ∈ ℝ | |
3 | halfgt0 11932 | . 2 ⊢ 0 < (1 / 2) | |
4 | 1, 2, 3 | ltleii 10841 | 1 ⊢ 0 ≤ (1 / 2) |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 5030 (class class class)co 7170 0cc0 10615 1c1 10616 ≤ cle 10754 / cdiv 11375 2c2 11771 |
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 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-op 4523 df-uni 4797 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5429 df-po 5442 df-so 5443 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-er 8320 df-en 8556 df-dom 8557 df-sdom 8558 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-div 11376 df-2 11779 |
This theorem is referenced by: 2tnp1ge0ge0 13290 geo2lim 15323 geoihalfsum 15330 bitsp1o 15876 htpycc 23732 pco0 23766 pcoval2 23768 pcocn 23769 pcohtpylem 23771 pcopt 23774 pcopt2 23775 pcoass 23776 pcorevlem 23778 iscmet3lem3 24042 mbfi1fseqlem6 24473 heron 25576 gausslemma2dlem1a 26101 zofldiv2ALTV 44648 zofldiv2 45411 sepfsepc 45743 |
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