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| Mirrors > Home > ILE Home > Th. List > 2pos | Unicode version | ||
| Description: The number 2 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 2pos |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 8325 |
. . 3
| |
| 2 | 0lt1 8454 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 8820 |
. 2
|
| 4 | df-2 9365 |
. 2
| |
| 5 | 3, 4 | breqtrri 4157 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
class class class wbr 4130 (class class class)co 6085
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-i2m1 8284 ax-0lt1 8285 ax-0id 8287 ax-rnegex 8288 ax-pre-lttrn 8293 ax-pre-ltadd 8295 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-xp 4780 df-iota 5337 df-fv 5385 df-ov 6088 df-pnf 8362 df-mnf 8363 df-ltxr 8365 df-2 9365 |
| This theorem is used by: 2ne0 9398 2ap0 9399 3pos 9400 halfgt0 9524 halflt1 9526 halfpos2 9539 halfnneg2 9541 nominpos 9547 avglt1 9548 avglt2 9549 nn0n0n1ge2b 9729 3halfnz 9747 2rp 10069 xleaddadd 10299 2tnp1ge0ge0 10749 mulp1mod1 10815 s3fv0g 11577 amgm2 11899 cos2bnd 12543 sin02gt0 12547 sincos2sgn 12549 sin4lt0 12550 epos 12564 oexpneg 12660 oddge22np1 12664 evennn02n 12665 nn0ehalf 12686 nno 12689 nn0oddm1d2 12692 nnoddm1d2 12693 flodddiv4t2lthalf 12722 sqrt2re 12958 sqrt2irrap 12976 slotsdifdsndx 13628 imasvalstrd 13668 cnfldstr 14944 bl2in 15553 pilem3 15934 pipos 15939 sinhalfpilem 15942 sincosq1lem 15976 sinq12gt0 15981 coseq00topi 15986 coseq0negpitopi 15987 tangtx 15989 sincos4thpi 15991 tan4thpi 15992 sincos6thpi 15993 cosordlem 16000 cos02pilt1 16002 log2tlbndlog2 16139 ppiqfi 16158 ppiqltx 16183 ppiqub 16194 bcmono 16202 bpos1lem 16207 bposlem1 16209 bposlem2 16210 bposlem3 16211 bposlem4 16212 bposlem5 16213 gausslemma2dlem0c 16268 gausslemma2dlem1a 16275 gausslemma2dlem2 16279 gausslemma2dlem3 16280 lgseisenlem1 16287 lgseisenlem2 16288 lgseisenlem3 16289 lgsquadlem1 16294 lgsquadlem2 16295 2lgslem1a1 16303 2lgslem1a2 16304 2lgslem1c 16307 2lgslem3a1 16314 konigsberg 16832 ex-fl 16837 |
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