Step |
Hyp |
Ref |
Expression |
1 |
|
dvreq1.b |
|
2 |
|
dvreq1.o |
|
3 |
|
dvreq1.d |
|
4 |
|
dvreq1.t |
|
5 |
|
oveq1 |
|
6 |
|
eqid |
|
7 |
1 2 3 6
|
dvrcan1 |
|
8 |
1 2
|
unitcl |
|
9 |
1 6 4
|
ringlidm |
|
10 |
8 9
|
sylan2 |
|
11 |
10
|
3adant2 |
|
12 |
7 11
|
eqeq12d |
|
13 |
5 12
|
syl5ib |
|
14 |
2 3 4
|
dvrid |
|
15 |
14
|
3adant2 |
|
16 |
|
oveq1 |
|
17 |
16
|
eqeq1d |
|
18 |
15 17
|
syl5ibrcom |
|
19 |
13 18
|
impbid |
|