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Mirrors > Home > MPE Home > Th. List > rphalflt | Structured version Visualization version GIF version |
Description: Half of a positive real is less than the original number. (Contributed by Mario Carneiro, 21-May-2014.) |
Ref | Expression |
---|---|
rphalflt | ⊢ (𝐴 ∈ ℝ+ → (𝐴 / 2) < 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elrp 12433 | . 2 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) | |
2 | halfpos 11905 | . . 3 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 ↔ (𝐴 / 2) < 𝐴)) | |
3 | 2 | biimpa 481 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴) → (𝐴 / 2) < 𝐴) |
4 | 1, 3 | sylbi 220 | 1 ⊢ (𝐴 ∈ ℝ+ → (𝐴 / 2) < 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2112 class class class wbr 5033 (class class class)co 7151 ℝcr 10575 0cc0 10576 < clt 10714 / cdiv 11336 2c2 11730 ℝ+crp 12431 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-sep 5170 ax-nul 5177 ax-pow 5235 ax-pr 5299 ax-un 7460 ax-resscn 10633 ax-1cn 10634 ax-icn 10635 ax-addcl 10636 ax-addrcl 10637 ax-mulcl 10638 ax-mulrcl 10639 ax-mulcom 10640 ax-addass 10641 ax-mulass 10642 ax-distr 10643 ax-i2m1 10644 ax-1ne0 10645 ax-1rid 10646 ax-rnegex 10647 ax-rrecex 10648 ax-cnre 10649 ax-pre-lttri 10650 ax-pre-lttrn 10651 ax-pre-ltadd 10652 ax-pre-mulgt0 10653 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ne 2953 df-nel 3057 df-ral 3076 df-rex 3077 df-reu 3078 df-rmo 3079 df-rab 3080 df-v 3412 df-sbc 3698 df-csb 3807 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-nul 4227 df-if 4422 df-pw 4497 df-sn 4524 df-pr 4526 df-op 4530 df-uni 4800 df-br 5034 df-opab 5096 df-mpt 5114 df-id 5431 df-po 5444 df-so 5445 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 6295 df-fun 6338 df-fn 6339 df-f 6340 df-f1 6341 df-fo 6342 df-f1o 6343 df-fv 6344 df-riota 7109 df-ov 7154 df-oprab 7155 df-mpo 7156 df-er 8300 df-en 8529 df-dom 8530 df-sdom 8531 df-pnf 10716 df-mnf 10717 df-xr 10718 df-ltxr 10719 df-le 10720 df-sub 10911 df-neg 10912 df-div 11337 df-2 11738 df-rp 12432 |
This theorem is referenced by: rpltrp 12776 rpnnen2lem11 15626 sqrt2irr 15651 metcnpi3 23249 cfilucfil 23262 reperflem 23520 iccntr 23523 icccmplem2 23525 reconnlem2 23529 cnllycmp 23658 bcthlem5 24029 minveclem3 24130 ivthlem2 24153 lhop1lem 24713 dvcnvre 24719 aaliou 25034 aaliou2b 25037 cosordlem 25222 tanord1 25229 argregt0 25301 argrege0 25302 isosctrlem1 25504 asinsin 25578 asin1 25580 atan1 25614 lgamucov 25723 lgsqrlem2 26031 lgsquadlem2 26065 lgsquadlem3 26066 2sqlem8 26110 chebbnd1lem2 26154 pntibnd 26277 pntlem3 26293 ubthlem1 28753 nmcexi 29909 ftc1anc 35419 flt4lem7 39989 isosctrlem1ALT 42014 dstregt0 42281 supxrge 42339 rphalfltd 42461 stoweidlem62 43071 fourierdlem79 43194 |
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