Step |
Hyp |
Ref |
Expression |
1 |
|
subgabl.h |
|
2 |
|
submcmn2.z |
|
3 |
1
|
submbas |
|
4 |
|
eqid |
|
5 |
1 4
|
ressplusg |
|
6 |
5
|
oveqd |
|
7 |
5
|
oveqd |
|
8 |
6 7
|
eqeq12d |
|
9 |
3 8
|
raleqbidv |
|
10 |
3 9
|
raleqbidv |
|
11 |
|
eqid |
|
12 |
11
|
submss |
|
13 |
11 4 2
|
sscntz |
|
14 |
12 12 13
|
syl2anc |
|
15 |
1
|
submmnd |
|
16 |
|
eqid |
|
17 |
|
eqid |
|
18 |
16 17
|
iscmn |
|
19 |
18
|
baib |
|
20 |
15 19
|
syl |
|
21 |
10 14 20
|
3bitr4rd |
|