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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1re 7789 |
. . 3
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2 | 0lt1 7913 |
. . 3
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3 | 1, 1, 2, 2 | addgt0ii 8277 |
. 2
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4 | df-2 8803 |
. 2
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5 | 3, 4 | breqtrri 3963 |
1
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Colors of variables: wff set class |
Syntax hints: class class
class wbr 3937 (class class class)co 5782
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This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-addcom 7744 ax-addass 7746 ax-i2m1 7749 ax-0lt1 7750 ax-0id 7752 ax-rnegex 7753 ax-pre-lttrn 7758 ax-pre-ltadd 7760 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-rab 2426 df-v 2691 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-xp 4553 df-iota 5096 df-fv 5139 df-ov 5785 df-pnf 7826 df-mnf 7827 df-ltxr 7829 df-2 8803 |
This theorem is referenced by: 2ne0 8836 2ap0 8837 3pos 8838 halfgt0 8959 halflt1 8961 halfpos2 8974 halfnneg2 8976 nominpos 8981 avglt1 8982 avglt2 8983 nn0n0n1ge2b 9154 3halfnz 9172 2rp 9475 xleaddadd 9700 2tnp1ge0ge0 10105 mulp1mod1 10169 amgm2 10922 cos2bnd 11503 sin02gt0 11506 sincos2sgn 11508 sin4lt0 11509 epos 11523 oexpneg 11610 oddge22np1 11614 evennn02n 11615 nn0ehalf 11636 nno 11639 nn0oddm1d2 11642 nnoddm1d2 11643 flodddiv4t2lthalf 11670 sqrt2re 11877 sqrt2irrap 11894 bl2in 12611 pilem3 12912 pipos 12917 sinhalfpilem 12920 sincosq1lem 12954 sinq12gt0 12959 coseq00topi 12964 coseq0negpitopi 12965 tangtx 12967 sincos4thpi 12969 tan4thpi 12970 sincos6thpi 12971 cosordlem 12978 cos02pilt1 12980 ex-fl 13108 |
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