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Mirrors > Home > ILE Home > Th. List > 7pos | Unicode version |
Description: The number 7 is positive. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
7pos |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 6re 8963 | . . 3 | |
2 | 1re 7923 | . . 3 | |
3 | 6pos 8983 | . . 3 | |
4 | 0lt1 8050 | . . 3 | |
5 | 1, 2, 3, 4 | addgt0ii 8414 | . 2 |
6 | df-7 8946 | . 2 | |
7 | 5, 6 | breqtrri 4017 | 1 |
Colors of variables: wff set class |
Syntax hints: class class class wbr 3990 (class class class)co 5857 cc0 7778 c1 7779 caddc 7781 clt 7958 c6 8937 c7 8938 |
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 610 ax-in2 611 ax-io 705 ax-5 1441 ax-7 1442 ax-gen 1443 ax-ie1 1487 ax-ie2 1488 ax-8 1498 ax-10 1499 ax-11 1500 ax-i12 1501 ax-bndl 1503 ax-4 1504 ax-17 1520 ax-i9 1524 ax-ial 1528 ax-i5r 1529 ax-13 2144 ax-14 2145 ax-ext 2153 ax-sep 4108 ax-pow 4161 ax-pr 4195 ax-un 4419 ax-setind 4522 ax-cnex 7869 ax-resscn 7870 ax-1cn 7871 ax-1re 7872 ax-icn 7873 ax-addcl 7874 ax-addrcl 7875 ax-mulcl 7876 ax-addcom 7878 ax-addass 7880 ax-i2m1 7883 ax-0lt1 7884 ax-0id 7886 ax-rnegex 7887 ax-pre-lttrn 7892 ax-pre-ltadd 7894 |
This theorem depends on definitions: df-bi 116 df-3an 976 df-tru 1352 df-fal 1355 df-nf 1455 df-sb 1757 df-eu 2023 df-mo 2024 df-clab 2158 df-cleq 2164 df-clel 2167 df-nfc 2302 df-ne 2342 df-nel 2437 df-ral 2454 df-rex 2455 df-rab 2458 df-v 2733 df-dif 3124 df-un 3126 df-in 3128 df-ss 3135 df-pw 3569 df-sn 3590 df-pr 3591 df-op 3593 df-uni 3798 df-br 3991 df-opab 4052 df-xp 4618 df-iota 5162 df-fv 5208 df-ov 5860 df-pnf 7960 df-mnf 7961 df-ltxr 7963 df-2 8941 df-3 8942 df-4 8943 df-5 8944 df-6 8945 df-7 8946 |
This theorem is referenced by: 8pos 8985 lgsdir2lem1 13840 |
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