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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 8331 |
. . 3
| |
| 2 | 0lt1 8460 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 8826 |
. 2
|
| 4 | df-2 9372 |
. 2
| |
| 5 | 3, 4 | breqtrri 4158 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
class class class wbr 4131 (class class class)co 6088
|
| 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 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-addass 8287 ax-i2m1 8290 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| 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 4132 df-opab 4194 df-xp 4782 df-iota 5340 df-fv 5388 df-ov 6091 df-pnf 8368 df-mnf 8369 df-ltxr 8371 df-2 9372 |
| This theorem is used by: 2ne0 9405 2ap0 9406 3pos 9407 halfgt0 9531 halflt1 9533 halfpos2 9546 halfnneg2 9548 nominpos 9554 avglt1 9555 avglt2 9556 nn0n0n1ge2b 9734 3halfnz 9753 2rp 10075 xleaddadd 10305 2tnp1ge0ge0 10756 mulp1mod1 10822 s3fv0g 11584 amgm2 11906 cos2bnd 12551 sin02gt0 12555 sincos2sgn 12557 sin4lt0 12558 epos 12572 oexpneg 12668 oddge22np1 12672 evennn02n 12673 nn0ehalf 12694 nno 12697 nn0oddm1d2 12700 nnoddm1d2 12701 flodddiv4t2lthalf 12730 sqrt2re 12966 sqrt2irrap 12984 slotsdifdsndx 13637 imasvalstrd 13677 cnfldstr 15003 bl2in 15646 pilem3 16027 pipos 16032 sinhalfpilem 16035 sincosq1lem 16069 sinq12gt0 16074 coseq00topi 16079 coseq0negpitopi 16080 tangtx 16082 sincos4thpi 16084 tan4thpi 16085 sincos6thpi 16086 cosordlem 16094 cos02pilt1 16096 log2tlbndlog2 16237 ppiqfi 16259 ppiqltx 16298 ppiqub 16310 chtublem 16312 chtqub 16313 bcmono 16321 bpos1lem 16326 bposlem1 16328 bposlem2 16329 bposlem3 16330 bposlem4 16331 bposlem5 16332 bposlem6 16333 bposlem7 16334 gausslemma2dlem0c 16392 gausslemma2dlem1a 16399 gausslemma2dlem2 16403 gausslemma2dlem3 16404 lgseisenlem1 16411 lgseisenlem2 16412 lgseisenlem3 16413 lgsquadlem1 16418 lgsquadlem2 16419 2lgslem1a1 16427 2lgslem1a2 16428 2lgslem1c 16431 2lgslem3a1 16438 konigsberg 16956 ex-fl 16961 |
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