Step |
Hyp |
Ref |
Expression |
1 |
|
dchrsum.g |
|
2 |
|
dchrsum.z |
|
3 |
|
dchrsum.d |
|
4 |
|
dchrsum.1 |
|
5 |
|
dchrsum.x |
|
6 |
|
dchrsum.b |
|
7 |
|
eqid |
|
8 |
6 7
|
unitss |
|
9 |
8
|
a1i |
|
10 |
1 2 3 6 5
|
dchrf |
|
11 |
8
|
sseli |
|
12 |
|
ffvelrn |
|
13 |
10 11 12
|
syl2an |
|
14 |
|
eldif |
|
15 |
5
|
adantr |
|
16 |
|
simpr |
|
17 |
1 2 3 6 7 15 16
|
dchrn0 |
|
18 |
17
|
biimpd |
|
19 |
18
|
necon1bd |
|
20 |
19
|
impr |
|
21 |
14 20
|
sylan2b |
|
22 |
1 3
|
dchrrcl |
|
23 |
2 6
|
znfi |
|
24 |
5 22 23
|
3syl |
|
25 |
9 13 21 24
|
fsumss |
|
26 |
1 2 3 4 5 7
|
dchrsum2 |
|
27 |
25 26
|
eqtr3d |
|