Step |
Hyp |
Ref |
Expression |
1 |
|
dvun.j |
|
2 |
|
dvun.k |
|
3 |
|
dvun.s |
|
4 |
|
dvun.f |
|
5 |
|
dvun.g |
|
6 |
|
dvun.a |
|
7 |
|
dvun.b |
|
8 |
|
dvun.d |
|
9 |
|
dvun.n |
|
10 |
|
resundi |
|
11 |
9
|
reseq2d |
|
12 |
10 11
|
eqtr3id |
|
13 |
4 5 8
|
fun2d |
|
14 |
6 7
|
unssd |
|
15 |
2 1
|
dvres |
|
16 |
3 13 14 6 15
|
syl22anc |
|
17 |
4
|
ffnd |
|
18 |
5
|
ffnd |
|
19 |
|
fnunres1 |
|
20 |
17 18 8 19
|
syl3anc |
|
21 |
20
|
oveq2d |
|
22 |
16 21
|
eqtr3d |
|
23 |
2 1
|
dvres |
|
24 |
3 13 14 7 23
|
syl22anc |
|
25 |
|
fnunres2 |
|
26 |
17 18 8 25
|
syl3anc |
|
27 |
26
|
oveq2d |
|
28 |
24 27
|
eqtr3d |
|
29 |
22 28
|
uneq12d |
|
30 |
2 1
|
dvres |
|
31 |
3 13 14 14 30
|
syl22anc |
|
32 |
13
|
ffnd |
|
33 |
|
fnresdm |
|
34 |
32 33
|
syl |
|
35 |
34
|
oveq2d |
|
36 |
31 35
|
eqtr3d |
|
37 |
12 29 36
|
3eqtr3d |
|