| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 2pos | GIF version | ||
| Description: The number 2 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 2pos | ⊢ 0 < 2 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 8332 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 0lt1 8461 | . . 3 ⊢ 0 < 1 | |
| 3 | 1, 1, 2, 2 | addgt0ii 8827 | . 2 ⊢ 0 < (1 + 1) |
| 4 | df-2 9373 | . 2 ⊢ 2 = (1 + 1) | |
| 5 | 3, 4 | breqtrri 4158 | 1 ⊢ 0 < 2 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: class class class wbr 4131 (class class class)co 6088 0cc0 8186 1c1 8187 + caddc 8189 < clt 8367 2c2 9365 |
| 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 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-addcom 8286 ax-addass 8288 ax-i2m1 8291 ax-0lt1 8292 ax-0id 8294 ax-rnegex 8295 ax-pre-lttrn 8300 ax-pre-ltadd 8302 |
| 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 8369 df-mnf 8370 df-ltxr 8372 df-2 9373 |
| This theorem is used by: 2ne0 9406 2ap0 9407 3pos 9408 halfgt0 9532 halflt1 9534 halfpos2 9547 halfnneg2 9549 nominpos 9555 avglt1 9556 avglt2 9557 nn0n0n1ge2b 9737 3halfnz 9755 2rp 10077 xleaddadd 10307 2tnp1ge0ge0 10758 mulp1mod1 10824 s3fv0g 11586 amgm2 11908 cos2bnd 12553 sin02gt0 12557 sincos2sgn 12559 sin4lt0 12560 epos 12574 oexpneg 12670 oddge22np1 12674 evennn02n 12675 nn0ehalf 12696 nno 12699 nn0oddm1d2 12702 nnoddm1d2 12703 flodddiv4t2lthalf 12732 sqrt2re 12968 sqrt2irrap 12986 slotsdifdsndx 13639 imasvalstrd 13679 cnfldstr 15005 bl2in 15641 pilem3 16022 pipos 16027 sinhalfpilem 16030 sincosq1lem 16064 sinq12gt0 16069 coseq00topi 16074 coseq0negpitopi 16075 tangtx 16077 sincos4thpi 16079 tan4thpi 16080 sincos6thpi 16081 cosordlem 16089 cos02pilt1 16091 log2tlbndlog2 16232 ppiqfi 16254 ppiqltx 16293 ppiqub 16305 chtublem 16307 chtqub 16308 bcmono 16316 bpos1lem 16321 bposlem1 16323 bposlem2 16324 bposlem3 16325 bposlem4 16326 bposlem5 16327 bposlem6 16328 bposlem7 16329 gausslemma2dlem0c 16387 gausslemma2dlem1a 16394 gausslemma2dlem2 16398 gausslemma2dlem3 16399 lgseisenlem1 16406 lgseisenlem2 16407 lgseisenlem3 16408 lgsquadlem1 16413 lgsquadlem2 16414 2lgslem1a1 16422 2lgslem1a2 16423 2lgslem1c 16426 2lgslem3a1 16433 konigsberg 16951 ex-fl 16956 |
| Copyright terms: Public domain | W3C validator |