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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 13034 | . 2 ⊢ (𝐴 ∈ ℝ+ ↔ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) | |
2 | halfpos 12494 | . . 3 ⊢ (𝐴 ∈ ℝ → (0 < 𝐴 ↔ (𝐴 / 2) < 𝐴)) | |
3 | 2 | biimpa 476 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 0 < 𝐴) → (𝐴 / 2) < 𝐴) |
4 | 1, 3 | sylbi 217 | 1 ⊢ (𝐴 ∈ ℝ+ → (𝐴 / 2) < 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2106 class class class wbr 5148 (class class class)co 7431 ℝcr 11152 0cc0 11153 < clt 11293 / cdiv 11918 2c2 12319 ℝ+crp 13032 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-po 5597 df-so 5598 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-div 11919 df-2 12327 df-rp 13033 |
This theorem is referenced by: rpltrp 13380 rpnnen2lem11 16257 sqrt2irr 16282 metcnpi3 24575 cfilucfil 24588 reperflem 24854 iccntr 24857 icccmplem2 24859 reconnlem2 24863 cnllycmp 25002 bcthlem5 25376 minveclem3 25477 ivthlem2 25501 lhop1lem 26067 dvcnvre 26073 aaliou 26395 aaliou2b 26398 cosordlem 26587 tanord1 26594 argregt0 26667 argrege0 26668 isosctrlem1 26876 asinsin 26950 asin1 26952 atan1 26986 lgamucov 27096 lgsqrlem2 27406 lgsquadlem2 27440 lgsquadlem3 27441 2sqlem8 27485 chebbnd1lem2 27529 pntibnd 27652 pntlem3 27668 ubthlem1 30899 nmcexi 32055 ftc1anc 37688 flt4lem7 42646 isosctrlem1ALT 44932 dstregt0 45232 supxrge 45288 rphalfltd 45405 stoweidlem62 46018 fourierdlem79 46141 |
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