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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 9206 | . . 3 ⊢ 2 ∈ ℝ | |
| 2 | 1re 8171 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 2pos 9227 | . . 3 ⊢ 0 < 2 | |
| 4 | 0lt1 8299 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8664 | . 2 ⊢ 0 < (2 + 1) |
| 6 | df-3 9196 | . 2 ⊢ 3 = (2 + 1) | |
| 7 | 5, 6 | breqtrri 4113 | 1 ⊢ 0 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4086 (class class class)co 6013 0cc0 8025 1c1 8026 + caddc 8028 < clt 8207 2c2 9187 3c3 9188 |
| 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 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8116 ax-resscn 8117 ax-1cn 8118 ax-1re 8119 ax-icn 8120 ax-addcl 8121 ax-addrcl 8122 ax-mulcl 8123 ax-addcom 8125 ax-addass 8127 ax-i2m1 8130 ax-0lt1 8131 ax-0id 8133 ax-rnegex 8134 ax-pre-lttrn 8139 ax-pre-ltadd 8141 |
| 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 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-xp 4729 df-iota 5284 df-fv 5332 df-ov 6016 df-pnf 8209 df-mnf 8210 df-ltxr 8212 df-2 9195 df-3 9196 |
| This theorem is referenced by: 3ne0 9231 3ap0 9232 4pos 9233 8th4div3 9356 halfpm6th 9357 3rp 9887 fz0to4untppr 10352 sqrt9 11602 ef01bndlem 12310 cos2bnd 12314 sin01gt0 12316 cos01gt0 12317 flodddiv4 12490 slotsdifunifndx 13308 coseq0negpitopi 15553 tangtx 15555 sincos6thpi 15559 cos02pilt1 15568 lgsdir2lem1 15750 ex-gcd 16277 |
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