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| Mirrors > Home > ILE Home > Th. List > 3pos | GIF version | ||
| Description: The number 3 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 3pos | ⊢ 0 < 3 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2re 9357 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8319 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9378 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8447 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8813 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9347 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4155 | 1 ⊢ 0 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4128 (class class class)co 6079 0cc0 8173 1c1 8174 + caddc 8176 < clt 8354 2c2 9338 3c3 9339 |
| 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 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 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-addcom 8273 ax-addass 8275 ax-i2m1 8278 ax-0lt1 8279 ax-0id 8281 ax-rnegex 8282 ax-pre-lttrn 8287 ax-pre-ltadd 8289 |
| This theorem 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 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-xp 4778 df-iota 5335 df-fv 5383 df-ov 6082 df-pnf 8356 df-mnf 8357 df-ltxr 8359 df-2 9346 df-3 9347 |
| This theorem is referenced by: 3ne0 9382 3ap0 9383 4pos 9384 8th4div3 9507 halfpm6th 9508 3rp 10043 fz0to4untppr 10514 sqrt9 11797 ef01bndlem 12506 cos2bnd 12510 sin01gt0 12512 cos01gt0 12513 flodddiv4 12686 slotsdifunifndx 13569 coseq0negpitopi 15920 tangtx 15922 sincos6thpi 15926 cos02pilt1 15935 log2tlbndlog2 16065 lgsdir2lem1 16130 ex-gcd 16728 |
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