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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 9196 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8161 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9217 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8289 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8654 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9186 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4110 | 1 ⊢ 0 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4083 (class class class)co 6010 0cc0 8015 1c1 8016 + caddc 8018 < clt 8197 2c2 9177 3c3 9178 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-un 4525 ax-setind 4630 ax-cnex 8106 ax-resscn 8107 ax-1cn 8108 ax-1re 8109 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-addcom 8115 ax-addass 8117 ax-i2m1 8120 ax-0lt1 8121 ax-0id 8123 ax-rnegex 8124 ax-pre-lttrn 8129 ax-pre-ltadd 8131 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-xp 4726 df-iota 5281 df-fv 5329 df-ov 6013 df-pnf 8199 df-mnf 8200 df-ltxr 8202 df-2 9185 df-3 9186 |
| This theorem is referenced by: 3ne0 9221 3ap0 9222 4pos 9223 8th4div3 9346 halfpm6th 9347 3rp 9872 fz0to4untppr 10337 sqrt9 11580 ef01bndlem 12288 cos2bnd 12292 sin01gt0 12294 cos01gt0 12295 flodddiv4 12468 slotsdifunifndx 13286 coseq0negpitopi 15531 tangtx 15533 sincos6thpi 15537 cos02pilt1 15546 lgsdir2lem1 15728 ex-gcd 16204 |
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