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Mirrors > Home > ILE Home > Th. List > 2tnp1ge0ge0 | Unicode version |
Description: Two times an integer plus one is not negative iff the integer is not negative. (Contributed by AV, 19-Jun-2021.) |
Ref | Expression |
---|---|
2tnp1ge0ge0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2z 9219 | . . . . . . 7 | |
2 | 1 | a1i 9 | . . . . . 6 |
3 | id 19 | . . . . . 6 | |
4 | 2, 3 | zmulcld 9319 | . . . . 5 |
5 | 4 | peano2zd 9316 | . . . 4 |
6 | 5 | zred 9313 | . . 3 |
7 | 2re 8927 | . . . 4 | |
8 | 7 | a1i 9 | . . 3 |
9 | 2pos 8948 | . . . 4 | |
10 | 9 | a1i 9 | . . 3 |
11 | ge0div 8766 | . . 3 | |
12 | 6, 8, 10, 11 | syl3anc 1228 | . 2 |
13 | 4 | zcnd 9314 | . . . . 5 |
14 | 1cnd 7915 | . . . . 5 | |
15 | 2cn 8928 | . . . . . . 7 | |
16 | 2ap0 8950 | . . . . . . 7 # | |
17 | 15, 16 | pm3.2i 270 | . . . . . 6 # |
18 | 17 | a1i 9 | . . . . 5 # |
19 | divdirap 8593 | . . . . 5 # | |
20 | 13, 14, 18, 19 | syl3anc 1228 | . . . 4 |
21 | zcn 9196 | . . . . . 6 | |
22 | 2cnd 8930 | . . . . . 6 | |
23 | 16 | a1i 9 | . . . . . 6 # |
24 | 21, 22, 23 | divcanap3d 8691 | . . . . 5 |
25 | 24 | oveq1d 5857 | . . . 4 |
26 | 20, 25 | eqtrd 2198 | . . 3 |
27 | 26 | breq2d 3994 | . 2 |
28 | zre 9195 | . . . 4 | |
29 | halfre 9070 | . . . . 5 | |
30 | 29 | a1i 9 | . . . 4 |
31 | 28, 30 | readdcld 7928 | . . 3 |
32 | halfge0 9073 | . . . 4 | |
33 | 28, 30 | addge01d 8431 | . . . 4 |
34 | 32, 33 | mpbii 147 | . . 3 |
35 | 1red 7914 | . . . 4 | |
36 | halflt1 9074 | . . . . 5 | |
37 | 36 | a1i 9 | . . . 4 |
38 | 30, 35, 28, 37 | ltadd2dd 8320 | . . 3 |
39 | btwnzge0 10235 | . . 3 | |
40 | 31, 3, 34, 38, 39 | syl22anc 1229 | . 2 |
41 | 12, 27, 40 | 3bitrd 213 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1343 wcel 2136 class class class wbr 3982 (class class class)co 5842 cc 7751 cr 7752 cc0 7753 c1 7754 caddc 7756 cmul 7758 clt 7933 cle 7934 # cap 8479 cdiv 8568 c2 8908 cz 9191 |
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-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 |
This theorem depends on definitions: df-bi 116 df-3or 969 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-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 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-int 3825 df-br 3983 df-opab 4044 df-id 4271 df-po 4274 df-iso 4275 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-iota 5153 df-fun 5190 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-n0 9115 df-z 9192 |
This theorem is referenced by: oddnn02np1 11817 |
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