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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 8814 | . . 3 ⊢ 2 ∈ ℝ | |
2 | 1re 7789 | . . 3 ⊢ 1 ∈ ℝ | |
3 | 2pos 8835 | . . 3 ⊢ 0 < 2 | |
4 | 0lt1 7913 | . . 3 ⊢ 0 < 1 | |
5 | 1, 2, 3, 4 | addgt0ii 8277 | . 2 ⊢ 0 < (2 + 1) |
6 | df-3 8804 | . 2 ⊢ 3 = (2 + 1) | |
7 | 5, 6 | breqtrri 3963 | 1 ⊢ 0 < 3 |
Colors of variables: wff set class |
Syntax hints: class class class wbr 3937 (class class class)co 5782 0cc0 7644 1c1 7645 + caddc 7647 < clt 7824 2c2 8795 3c3 8796 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-addcom 7744 ax-addass 7746 ax-i2m1 7749 ax-0lt1 7750 ax-0id 7752 ax-rnegex 7753 ax-pre-lttrn 7758 ax-pre-ltadd 7760 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-rab 2426 df-v 2691 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-xp 4553 df-iota 5096 df-fv 5139 df-ov 5785 df-pnf 7826 df-mnf 7827 df-ltxr 7829 df-2 8803 df-3 8804 |
This theorem is referenced by: 3ne0 8839 3ap0 8840 4pos 8841 8th4div3 8963 halfpm6th 8964 3rp 9476 sqrt9 10852 ef01bndlem 11499 cos2bnd 11503 sin01gt0 11504 cos01gt0 11505 flodddiv4 11667 coseq0negpitopi 12965 tangtx 12967 sincos6thpi 12971 cos02pilt1 12980 ex-gcd 13114 |
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