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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 11836 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12338 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5107 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11135 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12246 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11663 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12275 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12074 | . 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 5086 (class class class)co 7360 1c1 11030 < clt 11170 / cdiv 11798 2c2 12227 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-2 12235 |
| This theorem is referenced by: 2tnp1ge0ge0 13779 absrdbnd 15295 geo2sum 15829 geo2lim 15831 geoihalfsum 15838 efcllem 16033 rpnnen2lem12 16183 ltoddhalfle 16321 halfleoddlt 16322 bitsp1o 16393 elii1 24912 htpycc 24957 pcoval1 24990 pco1 24992 pcocn 24994 pcohtpylem 24996 pcopt 24999 pcopt2 25000 pcoass 25001 pcorevlem 25003 iscmet3lem3 25267 mbfi1fseqlem6 25697 itg2monolem3 25729 aaliou3lem3 26321 cxpcn3lem 26724 lgamgulmlem2 27007 lgsquadlem2 27358 chtppilim 27452 dnizeq0 36751 dnibndlem12 36765 knoppcnlem4 36772 cnndvlem1 36813 iccioo01 37657 cntotbnd 38131 halffl 45747 sumnnodd 46078 stoweidlem5 46451 stoweidlem14 46460 stoweidlem28 46474 dirkertrigeqlem3 46546 dirkercncflem1 46549 dirkercncflem2 46550 ceilhalf1 47798 zofldiv2ALTV 48150 zofldiv2 49019 sepfsepc 49415 |
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