| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 11844 | . . 3 ⊢ (1 / 1) = 1 | |
| 2 | 1lt2 12323 | . . 3 ⊢ 1 < 2 | |
| 3 | 1, 2 | eqbrtri 5121 | . 2 ⊢ (1 / 1) < 2 |
| 4 | 1re 11144 | . . 3 ⊢ 1 ∈ ℝ | |
| 5 | 2re 12231 | . . 3 ⊢ 2 ∈ ℝ | |
| 6 | 0lt1 11671 | . . 3 ⊢ 0 < 1 | |
| 7 | 2pos 12260 | . . 3 ⊢ 0 < 2 | |
| 8 | 4, 4, 5, 6, 7 | ltdiv23ii 12081 | . 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 5100 (class class class)co 7368 1c1 11039 < clt 11178 / cdiv 11806 2c2 12212 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 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 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-2 12220 |
| This theorem is referenced by: 2tnp1ge0ge0 13761 absrdbnd 15277 geo2sum 15808 geo2lim 15810 geoihalfsum 15817 efcllem 16012 rpnnen2lem12 16162 ltoddhalfle 16300 halfleoddlt 16301 bitsp1o 16372 elii1 24899 htpycc 24947 pcoval1 24981 pco1 24983 pcocn 24985 pcohtpylem 24987 pcopt 24990 pcopt2 24991 pcoass 24992 pcorevlem 24994 iscmet3lem3 25258 mbfi1fseqlem6 25689 itg2monolem3 25721 aaliou3lem3 26320 cxpcn3lem 26725 lgamgulmlem2 27008 lgsquadlem2 27360 chtppilim 27454 dnizeq0 36694 dnibndlem12 36708 knoppcnlem4 36715 cnndvlem1 36756 iccioo01 37576 cntotbnd 38041 halffl 45652 sumnnodd 45984 stoweidlem5 46357 stoweidlem14 46366 stoweidlem28 46380 dirkertrigeqlem3 46452 dirkercncflem1 46455 dirkercncflem2 46456 ceilhalf1 47688 zofldiv2ALTV 48016 zofldiv2 48885 sepfsepc 49281 |
| Copyright terms: Public domain | W3C validator |