| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 9736 3halfnz 9754 2rp 10076 xleaddadd 10306 2tnp1ge0ge0 10757 mulp1mod1 10823 s3fv0g 11585 amgm2 11907 cos2bnd 12552 sin02gt0 12556 sincos2sgn 12558 sin4lt0 12559 epos 12573 oexpneg 12669 oddge22np1 12673 evennn02n 12674 nn0ehalf 12695 nno 12698 nn0oddm1d2 12701 nnoddm1d2 12702 flodddiv4t2lthalf 12731 sqrt2re 12967 sqrt2irrap 12985 slotsdifdsndx 13638 imasvalstrd 13678 cnfldstr 15004 bl2in 15629 pilem3 16010 pipos 16015 sinhalfpilem 16018 sincosq1lem 16052 sinq12gt0 16057 coseq00topi 16062 coseq0negpitopi 16063 tangtx 16065 sincos4thpi 16067 tan4thpi 16068 sincos6thpi 16069 cosordlem 16077 cos02pilt1 16079 log2tlbndlog2 16220 ppiqfi 16242 ppiqltx 16281 ppiqub 16293 chtublem 16295 chtqub 16296 bcmono 16304 bpos1lem 16309 bposlem1 16311 bposlem2 16312 bposlem3 16313 bposlem4 16314 bposlem5 16315 bposlem6 16316 bposlem7 16317 gausslemma2dlem0c 16375 gausslemma2dlem1a 16382 gausslemma2dlem2 16386 gausslemma2dlem3 16387 lgseisenlem1 16394 lgseisenlem2 16395 lgseisenlem3 16396 lgsquadlem1 16401 lgsquadlem2 16402 2lgslem1a1 16410 2lgslem1a2 16411 2lgslem1c 16414 2lgslem3a1 16421 konigsberg 16939 ex-fl 16944 |
| Copyright terms: Public domain | W3C validator |