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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 5781 | . . . . . 6 | |
2 | 1 | oveq1d 5789 | . . . . 5 |
3 | 2 | eleq1d 2208 | . . . 4 |
4 | oveq1 5781 | . . . . 5 | |
5 | 4 | eleq1d 2208 | . . . 4 |
6 | 3, 5 | orbi12d 782 | . . 3 |
7 | oveq1 5781 | . . . . . 6 | |
8 | 7 | oveq1d 5789 | . . . . 5 |
9 | 8 | eleq1d 2208 | . . . 4 |
10 | oveq1 5781 | . . . . 5 | |
11 | 10 | eleq1d 2208 | . . . 4 |
12 | 9, 11 | orbi12d 782 | . . 3 |
13 | oveq1 5781 | . . . . . 6 | |
14 | 13 | oveq1d 5789 | . . . . 5 |
15 | 14 | eleq1d 2208 | . . . 4 |
16 | oveq1 5781 | . . . . 5 | |
17 | 16 | eleq1d 2208 | . . . 4 |
18 | 15, 17 | orbi12d 782 | . . 3 |
19 | oveq1 5781 | . . . . . 6 | |
20 | 19 | oveq1d 5789 | . . . . 5 |
21 | 20 | eleq1d 2208 | . . . 4 |
22 | oveq1 5781 | . . . . 5 | |
23 | 22 | eleq1d 2208 | . . . 4 |
24 | 21, 23 | orbi12d 782 | . . 3 |
25 | df-2 8779 | . . . . . . 7 | |
26 | 25 | oveq1i 5784 | . . . . . 6 |
27 | 2div2e1 8852 | . . . . . 6 | |
28 | 26, 27 | eqtr3i 2162 | . . . . 5 |
29 | 1nn 8731 | . . . . 5 | |
30 | 28, 29 | eqeltri 2212 | . . . 4 |
31 | 30 | orci 720 | . . 3 |
32 | peano2nn 8732 | . . . . . 6 | |
33 | nncn 8728 | . . . . . . . 8 | |
34 | add1p1 8969 | . . . . . . . . . 10 | |
35 | 34 | oveq1d 5789 | . . . . . . . . 9 |
36 | 2cn 8791 | . . . . . . . . . . 11 | |
37 | 2ap0 8813 | . . . . . . . . . . . 12 # | |
38 | 36, 37 | pm3.2i 270 | . . . . . . . . . . 11 # |
39 | divdirap 8457 | . . . . . . . . . . 11 # | |
40 | 36, 38, 39 | mp3an23 1307 | . . . . . . . . . 10 |
41 | 27 | oveq2i 5785 | . . . . . . . . . 10 |
42 | 40, 41 | syl6eq 2188 | . . . . . . . . 9 |
43 | 35, 42 | eqtrd 2172 | . . . . . . . 8 |
44 | 33, 43 | syl 14 | . . . . . . 7 |
45 | 44 | eleq1d 2208 | . . . . . 6 |
46 | 32, 45 | syl5ibr 155 | . . . . 5 |
47 | 46 | orim2d 777 | . . . 4 |
48 | orcom 717 | . . . 4 | |
49 | 47, 48 | syl6ib 160 | . . 3 |
50 | 6, 12, 18, 24, 31, 49 | nnind 8736 | . 2 |
51 | 50 | orcomd 718 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wo 697 wceq 1331 wcel 1480 class class class wbr 3929 (class class class)co 5774 cc 7618 cc0 7620 c1 7621 caddc 7623 # cap 8343 cdiv 8432 cn 8720 c2 8771 |
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 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-cnex 7711 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-mulrcl 7719 ax-addcom 7720 ax-mulcom 7721 ax-addass 7722 ax-mulass 7723 ax-distr 7724 ax-i2m1 7725 ax-0lt1 7726 ax-1rid 7727 ax-0id 7728 ax-rnegex 7729 ax-precex 7730 ax-cnre 7731 ax-pre-ltirr 7732 ax-pre-ltwlin 7733 ax-pre-lttrn 7734 ax-pre-apti 7735 ax-pre-ltadd 7736 ax-pre-mulgt0 7737 ax-pre-mulext 7738 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-reu 2423 df-rmo 2424 df-rab 2425 df-v 2688 df-sbc 2910 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-id 4215 df-po 4218 df-iso 4219 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 df-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-pnf 7802 df-mnf 7803 df-xr 7804 df-ltxr 7805 df-le 7806 df-sub 7935 df-neg 7936 df-reap 8337 df-ap 8344 df-div 8433 df-inn 8721 df-2 8779 |
This theorem is referenced by: nneo 9154 zeo 9156 |
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