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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 11845 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12347 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5107 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11144 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12255 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11672 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12284 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12083 | . 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 7367 1c1 11039 < clt 11179 / cdiv 11807 2c2 12236 |
| 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 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-2 12244 |
| This theorem is referenced by: 2tnp1ge0ge0 13788 absrdbnd 15304 geo2sum 15838 geo2lim 15840 geoihalfsum 15847 efcllem 16042 rpnnen2lem12 16192 ltoddhalfle 16330 halfleoddlt 16331 bitsp1o 16402 elii1 24902 htpycc 24947 pcoval1 24980 pco1 24982 pcocn 24984 pcohtpylem 24986 pcopt 24989 pcopt2 24990 pcoass 24991 pcorevlem 24993 iscmet3lem3 25257 mbfi1fseqlem6 25687 itg2monolem3 25719 aaliou3lem3 26310 cxpcn3lem 26711 lgamgulmlem2 26993 lgsquadlem2 27344 chtppilim 27438 dnizeq0 36735 dnibndlem12 36749 knoppcnlem4 36756 cnndvlem1 36797 iccioo01 37643 cntotbnd 38117 halffl 45729 sumnnodd 46060 stoweidlem5 46433 stoweidlem14 46442 stoweidlem28 46456 dirkertrigeqlem3 46528 dirkercncflem1 46531 dirkercncflem2 46532 ceilhalf1 47780 zofldiv2ALTV 48132 zofldiv2 49001 sepfsepc 49397 |
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