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| Mirrors > Home > MPE Home > Th. List > halflt1 | Structured version Visualization version GIF version | ||
| Description: One-half is less than one. (Contributed by NM, 24-Feb-2005.) |
| Ref | Expression |
|---|---|
| halflt1 | ⊢ (1 / 2) < 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1div1e1 12010 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12518 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5125 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11311 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12420 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11841 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12450 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12247 | . 2 ⊢ ((1 / 1) < 2 ↔ (1 / 2) < 1) |
| 9 | 3, 8 | mpbi 233 | 1 ⊢ (1 / 2) < 1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: class class class wbr 5102 (class class class)co 7420 1c1 11204 < clt 11346 / cdiv 11976 2c2 12400 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-er 8720 df-en 8977 df-dom 8978 df-sdom 8979 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 df-nn 12339 df-2 12408 |
| This theorem is used by: 2tnp1ge0ge0 13972 absrdbnd 15514 geo2sum 16047 geo2lim 16049 geoihalfsum 16056 efcllem 16248 rpnnen2lem12 16398 ltoddhalfle 16536 halfleoddlt 16537 bitsp1o 16608 elii1 25261 htpycc 25306 pcoval1 25339 pco1 25341 pcocn 25343 pcohtpylem 25345 pcopt 25348 pcopt2 25349 pcoass 25350 pcorevlem 25352 iscmet3lem3 25616 mbfi1fseqlem6 26046 itg2monolem3 26078 aaliou3lem3 26676 cxpcn3lem 27080 lgamgulmlem2 27362 lgsquadlem2 27713 chtppilim 27807 dnizeq0 37433 dnibndlem12 37447 knoppcnlem4 37454 cnndvlem1 37495 iccioo01 38343 cntotbnd 38823 halffl 46405 sumnnodd 46735 stoweidlem5 47108 stoweidlem14 47117 stoweidlem28 47131 dirkertrigeqlem3 47203 dirkercncflem1 47206 dirkercncflem2 47207 ceilhalf1 48501 zofldiv2ALTV 48853 zofldiv2 49736 sepfsepc 50135 |
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