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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 12034 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12542 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5129 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11335 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12444 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11865 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12474 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12271 | . 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 5106 (class class class)co 7443 1c1 11228 < clt 11370 / cdiv 12000 2c2 12424 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-resscn 11284 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-addrcl 11288 ax-mulcl 11289 ax-mulrcl 11290 ax-mulcom 11291 ax-addass 11292 ax-mulass 11293 ax-distr 11294 ax-i2m1 11295 ax-1ne0 11296 ax-1rid 11297 ax-rnegex 11298 ax-rrecex 11299 ax-cnre 11300 ax-pre-lttri 11301 ax-pre-lttrn 11302 ax-pre-ltadd 11303 ax-pre-mulgt0 11304 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-riota 7400 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-er 8745 df-en 9002 df-dom 9003 df-sdom 9004 df-pnf 11372 df-mnf 11373 df-xr 11374 df-ltxr 11375 df-le 11376 df-sub 11570 df-neg 11571 df-div 12001 df-nn 12363 df-2 12432 |
| This theorem is used by: 2tnp1ge0ge0 13996 absrdbnd 15538 geo2sum 16071 geo2lim 16073 geoihalfsum 16080 efcllem 16272 rpnnen2lem12 16422 ltoddhalfle 16560 halfleoddlt 16561 bitsp1o 16632 elii1 25286 htpycc 25331 pcoval1 25364 pco1 25366 pcocn 25368 pcohtpylem 25370 pcopt 25373 pcopt2 25374 pcoass 25375 pcorevlem 25377 iscmet3lem3 25641 mbfi1fseqlem6 26071 itg2monolem3 26103 aaliou3lem3 26701 cxpcn3lem 27105 lgamgulmlem2 27387 lgsquadlem2 27738 chtppilim 27832 dnizeq0 37519 dnibndlem12 37533 knoppcnlem4 37540 cnndvlem1 37581 iccioo01 38442 cntotbnd 38922 halffl 46517 sumnnodd 46847 stoweidlem5 47220 stoweidlem14 47229 stoweidlem28 47243 dirkertrigeqlem3 47315 dirkercncflem1 47318 dirkercncflem2 47319 ceilhalf1 48613 zofldiv2ALTV 48965 zofldiv2 49848 sepfsepc 50247 |
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