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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 8156 |
. . 3
| |
| 2 | 0lt1 8284 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 8649 |
. 2
|
| 4 | df-2 9180 |
. 2
| |
| 5 | 3, 4 | breqtrri 4110 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4083 (class class class)co 6007
|
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-addass 8112 ax-i2m1 8115 ax-0lt1 8116 ax-0id 8118 ax-rnegex 8119 ax-pre-lttrn 8124 ax-pre-ltadd 8126 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-xp 4725 df-iota 5278 df-fv 5326 df-ov 6010 df-pnf 8194 df-mnf 8195 df-ltxr 8197 df-2 9180 |
| This theorem is referenced by: 2ne0 9213 2ap0 9214 3pos 9215 halfgt0 9337 halflt1 9339 halfpos2 9352 halfnneg2 9354 nominpos 9360 avglt1 9361 avglt2 9362 nn0n0n1ge2b 9537 3halfnz 9555 2rp 9866 xleaddadd 10095 2tnp1ge0ge0 10533 mulp1mod1 10599 s3fv0g 11338 amgm2 11644 cos2bnd 12286 sin02gt0 12290 sincos2sgn 12292 sin4lt0 12293 epos 12307 oexpneg 12403 oddge22np1 12407 evennn02n 12408 nn0ehalf 12429 nno 12432 nn0oddm1d2 12435 nnoddm1d2 12436 flodddiv4t2lthalf 12465 sqrt2re 12700 sqrt2irrap 12717 slotsdifdsndx 13273 imasvalstrd 13318 cnfldstr 14537 bl2in 15092 pilem3 15472 pipos 15477 sinhalfpilem 15480 sincosq1lem 15514 sinq12gt0 15519 coseq00topi 15524 coseq0negpitopi 15525 tangtx 15527 sincos4thpi 15529 tan4thpi 15530 sincos6thpi 15531 cosordlem 15538 cos02pilt1 15540 gausslemma2dlem0c 15745 gausslemma2dlem1a 15752 gausslemma2dlem2 15756 gausslemma2dlem3 15757 lgseisenlem1 15764 lgseisenlem2 15765 lgseisenlem3 15766 lgsquadlem1 15771 lgsquadlem2 15772 2lgslem1a1 15780 2lgslem1a2 15781 2lgslem1c 15784 2lgslem3a1 15791 ex-fl 16144 |
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