| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 8pos | GIF version | ||
| Description: The number 8 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 8pos | ⊢ 0 < 8 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7re 9204 | . . 3 ⊢ 7 ∈ ℝ | |
| 2 | 1re 8156 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 7pos 9223 | . . 3 ⊢ 0 < 7 | |
| 4 | 0lt1 8284 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8649 | . 2 ⊢ 0 < (7 + 1) |
| 6 | df-8 9186 | . 2 ⊢ 8 = (7 + 1) | |
| 7 | 5, 6 | breqtrri 4110 | 1 ⊢ 0 < 8 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4083 (class class class)co 6007 0cc0 8010 1c1 8011 + caddc 8013 < clt 8192 7c7 9177 8c8 9178 |
| 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 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-addass 8112 ax-i2m1 8115 ax-0lt1 8116 ax-0id 8118 ax-rnegex 8119 ax-pre-lttrn 8124 ax-pre-ltadd 8126 |
| 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 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-xp 4725 df-iota 5278 df-fv 5326 df-ov 6010 df-pnf 8194 df-mnf 8195 df-ltxr 8197 df-2 9180 df-3 9181 df-4 9182 df-5 9183 df-6 9184 df-7 9185 df-8 9186 |
| This theorem is referenced by: 9pos 9225 8th4div3 9341 lgsdir2lem1 15722 lgsdir2lem4 15725 lgsdir2lem5 15726 2lgslem3a1 15791 2lgslem3b1 15792 2lgslem3c1 15793 2lgsoddprmlem1 15799 2lgsoddprmlem2 15800 2lgsoddprmlem3a 15801 2lgsoddprmlem3b 15802 2lgsoddprmlem3c 15803 2lgsoddprmlem3d 15804 |
| Copyright terms: Public domain | W3C validator |