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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 9324 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8289 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9345 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8416 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8782 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9314 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4141 | 1 ⊢ 0 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4114 (class class class)co 6058 0cc0 8143 1c1 8144 + caddc 8146 < clt 8324 2c2 9305 3c3 9306 |
| 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 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-addcom 8243 ax-addass 8245 ax-i2m1 8248 ax-0lt1 8249 ax-0id 8251 ax-rnegex 8252 ax-pre-lttrn 8257 ax-pre-ltadd 8259 |
| 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 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-opab 4177 df-xp 4760 df-iota 5317 df-fv 5365 df-ov 6061 df-pnf 8326 df-mnf 8327 df-ltxr 8329 df-2 9313 df-3 9314 |
| This theorem is referenced by: 3ne0 9349 3ap0 9350 4pos 9351 8th4div3 9474 halfpm6th 9475 3rp 10010 fz0to4untppr 10480 sqrt9 11758 ef01bndlem 12467 cos2bnd 12471 sin01gt0 12473 cos01gt0 12474 flodddiv4 12647 slotsdifunifndx 13529 coseq0negpitopi 15813 tangtx 15815 sincos6thpi 15819 cos02pilt1 15828 lgsdir2lem1 16013 ex-gcd 16611 |
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