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| Mirrors > Home > ILE Home > Th. List > 8pos | Unicode version | ||
| Description: The number 8 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 8pos |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7re 9268 |
. . 3
| |
| 2 | 1re 8221 |
. . 3
| |
| 3 | 7pos 9287 |
. . 3
| |
| 4 | 0lt1 8348 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8713 |
. 2
|
| 6 | df-8 9250 |
. 2
| |
| 7 | 5, 6 | breqtrri 4120 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4093 (class class class)co 6028
|
| 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 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-addcom 8175 ax-addass 8177 ax-i2m1 8180 ax-0lt1 8181 ax-0id 8183 ax-rnegex 8184 ax-pre-lttrn 8189 ax-pre-ltadd 8191 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-xp 4737 df-iota 5293 df-fv 5341 df-ov 6031 df-pnf 8258 df-mnf 8259 df-ltxr 8261 df-2 9244 df-3 9245 df-4 9246 df-5 9247 df-6 9248 df-7 9249 df-8 9250 |
| This theorem is referenced by: 9pos 9289 8th4div3 9405 lgsdir2lem1 15830 lgsdir2lem4 15833 lgsdir2lem5 15834 2lgslem3a1 15899 2lgslem3b1 15900 2lgslem3c1 15901 2lgsoddprmlem1 15907 2lgsoddprmlem2 15908 2lgsoddprmlem3a 15909 2lgsoddprmlem3b 15910 2lgsoddprmlem3c 15911 2lgsoddprmlem3d 15912 |
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