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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 8177 |
. . 3
| |
| 2 | 0lt1 8305 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 8670 |
. 2
|
| 4 | df-2 9201 |
. 2
| |
| 5 | 3, 4 | breqtrri 4115 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4088 (class class class)co 6017
|
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-addcom 8131 ax-addass 8133 ax-i2m1 8136 ax-0lt1 8137 ax-0id 8139 ax-rnegex 8140 ax-pre-lttrn 8145 ax-pre-ltadd 8147 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-iota 5286 df-fv 5334 df-ov 6020 df-pnf 8215 df-mnf 8216 df-ltxr 8218 df-2 9201 |
| This theorem is referenced by: 2ne0 9234 2ap0 9235 3pos 9236 halfgt0 9358 halflt1 9360 halfpos2 9373 halfnneg2 9375 nominpos 9381 avglt1 9382 avglt2 9383 nn0n0n1ge2b 9558 3halfnz 9576 2rp 9892 xleaddadd 10121 2tnp1ge0ge0 10560 mulp1mod1 10626 s3fv0g 11371 amgm2 11678 cos2bnd 12320 sin02gt0 12324 sincos2sgn 12326 sin4lt0 12327 epos 12341 oexpneg 12437 oddge22np1 12441 evennn02n 12442 nn0ehalf 12463 nno 12466 nn0oddm1d2 12469 nnoddm1d2 12470 flodddiv4t2lthalf 12499 sqrt2re 12734 sqrt2irrap 12751 slotsdifdsndx 13307 imasvalstrd 13352 cnfldstr 14571 bl2in 15126 pilem3 15506 pipos 15511 sinhalfpilem 15514 sincosq1lem 15548 sinq12gt0 15553 coseq00topi 15558 coseq0negpitopi 15559 tangtx 15561 sincos4thpi 15563 tan4thpi 15564 sincos6thpi 15565 cosordlem 15572 cos02pilt1 15574 gausslemma2dlem0c 15779 gausslemma2dlem1a 15786 gausslemma2dlem2 15790 gausslemma2dlem3 15791 lgseisenlem1 15798 lgseisenlem2 15799 lgseisenlem3 15800 lgsquadlem1 15805 lgsquadlem2 15806 2lgslem1a1 15814 2lgslem1a2 15815 2lgslem1c 15818 2lgslem3a1 15825 ex-fl 16321 |
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