Step |
Hyp |
Ref |
Expression |
1 |
|
qusring.u |
|
2 |
|
qusring.i |
|
3 |
|
qus1.o |
|
4 |
1
|
a1i |
|
5 |
|
eqid |
|
6 |
5
|
a1i |
|
7 |
|
eqid |
|
8 |
|
eqid |
|
9 |
|
eqid |
|
10 |
|
eqid |
|
11 |
|
eqid |
|
12 |
9 10 11 2
|
2idlval |
|
13 |
12
|
elin2 |
|
14 |
13
|
simplbi |
|
15 |
9
|
lidlsubg |
|
16 |
14 15
|
sylan2 |
|
17 |
|
eqid |
|
18 |
5 17
|
eqger |
|
19 |
16 18
|
syl |
|
20 |
|
ringabl |
|
21 |
20
|
adantr |
|
22 |
|
ablnsg |
|
23 |
21 22
|
syl |
|
24 |
16 23
|
eleqtrrd |
|
25 |
5 17 7
|
eqgcpbl |
|
26 |
24 25
|
syl |
|
27 |
5 17 2 8
|
2idlcpbl |
|
28 |
|
simpl |
|
29 |
4 6 7 8 3 19 26 27 28
|
qusring2 |
|