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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 11819 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12298 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5114 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11119 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12206 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11646 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12235 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12056 | . 2 ⊢ ((1 / 1) < 2 ↔ (1 / 2) < 1) |
| 9 | 3, 8 | mpbi 230 | 1 ⊢ (1 / 2) < 1 |
| Colors of variables: wff setvar class |
| Syntax hints: class class class wbr 5093 (class class class)co 7352 1c1 11014 < clt 11153 / cdiv 11781 2c2 12187 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-resscn 11070 ax-1cn 11071 ax-icn 11072 ax-addcl 11073 ax-addrcl 11074 ax-mulcl 11075 ax-mulrcl 11076 ax-mulcom 11077 ax-addass 11078 ax-mulass 11079 ax-distr 11080 ax-i2m1 11081 ax-1ne0 11082 ax-1rid 11083 ax-rnegex 11084 ax-rrecex 11085 ax-cnre 11086 ax-pre-lttri 11087 ax-pre-lttrn 11088 ax-pre-ltadd 11089 ax-pre-mulgt0 11090 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-br 5094 df-opab 5156 df-mpt 5175 df-id 5514 df-po 5527 df-so 5528 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7309 df-ov 7355 df-oprab 7356 df-mpo 7357 df-er 8628 df-en 8876 df-dom 8877 df-sdom 8878 df-pnf 11155 df-mnf 11156 df-xr 11157 df-ltxr 11158 df-le 11159 df-sub 11353 df-neg 11354 df-div 11782 df-2 12195 |
| This theorem is referenced by: 2tnp1ge0ge0 13735 absrdbnd 15251 geo2sum 15782 geo2lim 15784 geoihalfsum 15791 efcllem 15986 rpnnen2lem12 16136 ltoddhalfle 16274 halfleoddlt 16275 bitsp1o 16346 elii1 24859 htpycc 24907 pcoval1 24941 pco1 24943 pcocn 24945 pcohtpylem 24947 pcopt 24950 pcopt2 24951 pcoass 24952 pcorevlem 24954 iscmet3lem3 25218 mbfi1fseqlem6 25649 itg2monolem3 25681 aaliou3lem3 26280 cxpcn3lem 26685 lgamgulmlem2 26968 lgsquadlem2 27320 chtppilim 27414 dnizeq0 36540 dnibndlem12 36554 knoppcnlem4 36561 cnndvlem1 36602 iccioo01 37392 cntotbnd 37856 halffl 45421 sumnnodd 45754 stoweidlem5 46127 stoweidlem14 46136 stoweidlem28 46150 dirkertrigeqlem3 46222 dirkercncflem1 46225 dirkercncflem2 46226 ceilhalf1 47458 zofldiv2ALTV 47786 zofldiv2 48656 sepfsepc 49052 |
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