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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 9306 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8272 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9327 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8399 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8764 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9296 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4135 | 1 ⊢ 0 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4108 (class class class)co 6049 0cc0 8126 1c1 8127 + caddc 8129 < clt 8307 2c2 9287 3c3 9288 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-cnex 8217 ax-resscn 8218 ax-1cn 8219 ax-1re 8220 ax-icn 8221 ax-addcl 8222 ax-addrcl 8223 ax-mulcl 8224 ax-addcom 8226 ax-addass 8228 ax-i2m1 8231 ax-0lt1 8232 ax-0id 8234 ax-rnegex 8235 ax-pre-lttrn 8240 ax-pre-ltadd 8242 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2814 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-xp 4754 df-iota 5311 df-fv 5359 df-ov 6052 df-pnf 8309 df-mnf 8310 df-ltxr 8312 df-2 9295 df-3 9296 |
| This theorem is referenced by: 3ne0 9331 3ap0 9332 4pos 9333 8th4div3 9456 halfpm6th 9457 3rp 9991 fz0to4untppr 10457 sqrt9 11729 ef01bndlem 12438 cos2bnd 12442 sin01gt0 12444 cos01gt0 12445 flodddiv4 12618 slotsdifunifndx 13437 coseq0negpitopi 15693 tangtx 15695 sincos6thpi 15699 cos02pilt1 15708 lgsdir2lem1 15893 ex-gcd 16491 |
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