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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 9384 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8332 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9405 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8461 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8827 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9374 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4158 | 1 ⊢ 0 < 3 |
| 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 3c3 9366 |
| 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 df-3 9374 |
| This theorem is used by: 3ne0 9409 3ap0 9410 4pos 9411 8th4div3 9536 halfpm6th 9537 3rp 10078 fz0to4untppr 10549 sqrt9 11837 ef01bndlem 12549 cos2bnd 12553 sin01gt0 12555 cos01gt0 12556 flodddiv4 12729 43prm 13266 slotsdifunifndx 13646 coseq0negpitopi 16075 tangtx 16077 sincos6thpi 16081 cos02pilt1 16091 log2tlbndlog2 16232 ppiqub 16305 bposlem2 16324 bposlem3 16325 bposlem4 16326 bposlem5 16327 lgsdir2lem1 16364 ex-gcd 16962 |
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