Description: Binary relation expressing the dual modular pair property. (Contributed by NM, 15-Jan-2005) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | dmdbr5 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dmdbr4 | |
|
2 | chub1 | |
|
3 | 2 | ancoms | |
4 | ssin | |
|
5 | sstr2 | |
|
6 | 4 5 | sylbi | |
7 | 3 6 | sylan | |
8 | 7 | ex | |
9 | 8 | com23 | |
10 | 9 | ralimdva | |
11 | 10 | adantl | |
12 | 1 11 | sylbid | |
13 | sseq1 | |
|
14 | id | |
|
15 | oveq1 | |
|
16 | 15 | ineq1d | |
17 | 16 | oveq1d | |
18 | 14 17 | sseq12d | |
19 | 13 18 | imbi12d | |
20 | 19 | rspccv | |
21 | chjcl | |
|
22 | 21 | ancoms | |
23 | 22 | adantll | |
24 | chjcl | |
|
25 | 24 | adantr | |
26 | chincl | |
|
27 | 23 25 26 | syl2anc | |
28 | inss2 | |
|
29 | pm2.27 | |
|
30 | 28 29 | mpii | |
31 | 27 30 | syl | |
32 | chub2 | |
|
33 | 32 | adantll | |
34 | chub2 | |
|
35 | 34 | ancoms | |
36 | 35 | adantr | |
37 | 33 36 | ssind | |
38 | simplr | |
|
39 | chlejb2 | |
|
40 | 38 27 39 | syl2anc | |
41 | 37 40 | mpbid | |
42 | 41 | ineq1d | |
43 | inass | |
|
44 | incom | |
|
45 | chabs2 | |
|
46 | 44 45 | eqtrid | |
47 | 46 | ineq2d | |
48 | 43 47 | eqtrid | |
49 | 48 | adantr | |
50 | 42 49 | eqtrd | |
51 | 50 | oveq1d | |
52 | 51 | sseq2d | |
53 | 31 52 | sylibd | |
54 | 53 | ex | |
55 | 54 | com23 | |
56 | 20 55 | syl5 | |
57 | 56 | ralrimdv | |
58 | dmdbr4 | |
|
59 | 57 58 | sylibrd | |
60 | 12 59 | impbid | |