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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 8273 |
. . 3
| |
| 2 | 0lt1 8400 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 8765 |
. 2
|
| 4 | df-2 9296 |
. 2
| |
| 5 | 3, 4 | breqtrri 4136 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4109 (class class class)co 6050
|
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-setind 4659 ax-cnex 8218 ax-resscn 8219 ax-1cn 8220 ax-1re 8221 ax-icn 8222 ax-addcl 8223 ax-addrcl 8224 ax-mulcl 8225 ax-addcom 8227 ax-addass 8229 ax-i2m1 8232 ax-0lt1 8233 ax-0id 8235 ax-rnegex 8236 ax-pre-lttrn 8241 ax-pre-ltadd 8243 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-xp 4755 df-iota 5312 df-fv 5360 df-ov 6053 df-pnf 8310 df-mnf 8311 df-ltxr 8313 df-2 9296 |
| This theorem is referenced by: 2ne0 9329 2ap0 9330 3pos 9331 halfgt0 9453 halflt1 9455 halfpos2 9468 halfnneg2 9470 nominpos 9476 avglt1 9477 avglt2 9478 nn0n0n1ge2b 9657 3halfnz 9675 2rp 9991 xleaddadd 10220 2tnp1ge0ge0 10661 mulp1mod1 10727 s3fv0g 11483 amgm2 11803 cos2bnd 12446 sin02gt0 12450 sincos2sgn 12452 sin4lt0 12453 epos 12467 oexpneg 12563 oddge22np1 12567 evennn02n 12568 nn0ehalf 12589 nno 12592 nn0oddm1d2 12595 nnoddm1d2 12596 flodddiv4t2lthalf 12625 sqrt2re 12860 sqrt2irrap 12877 slotsdifdsndx 13438 imasvalstrd 13483 cnfldstr 14706 bl2in 15268 pilem3 15648 pipos 15653 sinhalfpilem 15656 sincosq1lem 15690 sinq12gt0 15695 coseq00topi 15700 coseq0negpitopi 15701 tangtx 15703 sincos4thpi 15705 tan4thpi 15706 sincos6thpi 15707 cosordlem 15714 cos02pilt1 15716 gausslemma2dlem0c 15924 gausslemma2dlem1a 15931 gausslemma2dlem2 15935 gausslemma2dlem3 15936 lgseisenlem1 15943 lgseisenlem2 15944 lgseisenlem3 15945 lgsquadlem1 15950 lgsquadlem2 15951 2lgslem1a1 15959 2lgslem1a2 15960 2lgslem1c 15963 2lgslem3a1 15970 konigsberg 16488 ex-fl 16493 |
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