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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 8940 | . . 3 | |
2 | 1re 7898 | . . 3 | |
3 | 7pos 8959 | . . 3 | |
4 | 0lt1 8025 | . . 3 | |
5 | 1, 2, 3, 4 | addgt0ii 8389 | . 2 |
6 | df-8 8922 | . 2 | |
7 | 5, 6 | breqtrri 4009 | 1 |
Colors of variables: wff set class |
Syntax hints: class class class wbr 3982 (class class class)co 5842 cc0 7753 c1 7754 caddc 7756 clt 7933 c7 8913 c8 8914 |
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 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-addcom 7853 ax-addass 7855 ax-i2m1 7858 ax-0lt1 7859 ax-0id 7861 ax-rnegex 7862 ax-pre-lttrn 7867 ax-pre-ltadd 7869 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-br 3983 df-opab 4044 df-xp 4610 df-iota 5153 df-fv 5196 df-ov 5845 df-pnf 7935 df-mnf 7936 df-ltxr 7938 df-2 8916 df-3 8917 df-4 8918 df-5 8919 df-6 8920 df-7 8921 df-8 8922 |
This theorem is referenced by: 9pos 8961 8th4div3 9076 lgsdir2lem1 13569 lgsdir2lem4 13572 lgsdir2lem5 13573 |
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