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Mirrors > Home > ILE Home > Th. List > nneoor | Unicode version |
Description: A positive integer is even or odd. (Contributed by Jim Kingdon, 15-Mar-2020.) |
Ref | Expression |
---|---|
nneoor |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 5843 | . . . . . 6 | |
2 | 1 | oveq1d 5851 | . . . . 5 |
3 | 2 | eleq1d 2233 | . . . 4 |
4 | oveq1 5843 | . . . . 5 | |
5 | 4 | eleq1d 2233 | . . . 4 |
6 | 3, 5 | orbi12d 783 | . . 3 |
7 | oveq1 5843 | . . . . . 6 | |
8 | 7 | oveq1d 5851 | . . . . 5 |
9 | 8 | eleq1d 2233 | . . . 4 |
10 | oveq1 5843 | . . . . 5 | |
11 | 10 | eleq1d 2233 | . . . 4 |
12 | 9, 11 | orbi12d 783 | . . 3 |
13 | oveq1 5843 | . . . . . 6 | |
14 | 13 | oveq1d 5851 | . . . . 5 |
15 | 14 | eleq1d 2233 | . . . 4 |
16 | oveq1 5843 | . . . . 5 | |
17 | 16 | eleq1d 2233 | . . . 4 |
18 | 15, 17 | orbi12d 783 | . . 3 |
19 | oveq1 5843 | . . . . . 6 | |
20 | 19 | oveq1d 5851 | . . . . 5 |
21 | 20 | eleq1d 2233 | . . . 4 |
22 | oveq1 5843 | . . . . 5 | |
23 | 22 | eleq1d 2233 | . . . 4 |
24 | 21, 23 | orbi12d 783 | . . 3 |
25 | df-2 8907 | . . . . . . 7 | |
26 | 25 | oveq1i 5846 | . . . . . 6 |
27 | 2div2e1 8980 | . . . . . 6 | |
28 | 26, 27 | eqtr3i 2187 | . . . . 5 |
29 | 1nn 8859 | . . . . 5 | |
30 | 28, 29 | eqeltri 2237 | . . . 4 |
31 | 30 | orci 721 | . . 3 |
32 | peano2nn 8860 | . . . . . 6 | |
33 | nncn 8856 | . . . . . . . 8 | |
34 | add1p1 9097 | . . . . . . . . . 10 | |
35 | 34 | oveq1d 5851 | . . . . . . . . 9 |
36 | 2cn 8919 | . . . . . . . . . . 11 | |
37 | 2ap0 8941 | . . . . . . . . . . . 12 # | |
38 | 36, 37 | pm3.2i 270 | . . . . . . . . . . 11 # |
39 | divdirap 8584 | . . . . . . . . . . 11 # | |
40 | 36, 38, 39 | mp3an23 1318 | . . . . . . . . . 10 |
41 | 27 | oveq2i 5847 | . . . . . . . . . 10 |
42 | 40, 41 | eqtrdi 2213 | . . . . . . . . 9 |
43 | 35, 42 | eqtrd 2197 | . . . . . . . 8 |
44 | 33, 43 | syl 14 | . . . . . . 7 |
45 | 44 | eleq1d 2233 | . . . . . 6 |
46 | 32, 45 | syl5ibr 155 | . . . . 5 |
47 | 46 | orim2d 778 | . . . 4 |
48 | orcom 718 | . . . 4 | |
49 | 47, 48 | syl6ib 160 | . . 3 |
50 | 6, 12, 18, 24, 31, 49 | nnind 8864 | . 2 |
51 | 50 | orcomd 719 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wo 698 wceq 1342 wcel 2135 class class class wbr 3976 (class class class)co 5836 cc 7742 cc0 7744 c1 7745 caddc 7747 # cap 8470 cdiv 8559 cn 8848 c2 8899 |
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 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-setind 4508 ax-cnex 7835 ax-resscn 7836 ax-1cn 7837 ax-1re 7838 ax-icn 7839 ax-addcl 7840 ax-addrcl 7841 ax-mulcl 7842 ax-mulrcl 7843 ax-addcom 7844 ax-mulcom 7845 ax-addass 7846 ax-mulass 7847 ax-distr 7848 ax-i2m1 7849 ax-0lt1 7850 ax-1rid 7851 ax-0id 7852 ax-rnegex 7853 ax-precex 7854 ax-cnre 7855 ax-pre-ltirr 7856 ax-pre-ltwlin 7857 ax-pre-lttrn 7858 ax-pre-apti 7859 ax-pre-ltadd 7860 ax-pre-mulgt0 7861 ax-pre-mulext 7862 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-nel 2430 df-ral 2447 df-rex 2448 df-reu 2449 df-rmo 2450 df-rab 2451 df-v 2723 df-sbc 2947 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-int 3819 df-br 3977 df-opab 4038 df-id 4265 df-po 4268 df-iso 4269 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-iota 5147 df-fun 5184 df-fv 5190 df-riota 5792 df-ov 5839 df-oprab 5840 df-mpo 5841 df-pnf 7926 df-mnf 7927 df-xr 7928 df-ltxr 7929 df-le 7930 df-sub 8062 df-neg 8063 df-reap 8464 df-ap 8471 df-div 8560 df-inn 8849 df-2 8907 |
This theorem is referenced by: nneo 9285 zeo 9287 |
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