Step |
Hyp |
Ref |
Expression |
1 |
|
zrinitorngc.u |
|
2 |
|
zrinitorngc.c |
|
3 |
|
zrinitorngc.z |
|
4 |
|
zrinitorngc.e |
|
5 |
1 2 3 4
|
zrinitorngc |
|
6 |
1 2 3 4
|
zrtermorngc |
|
7 |
|
eqid |
|
8 |
|
eqid |
|
9 |
2
|
rngccat |
|
10 |
1 9
|
syl |
|
11 |
3
|
eldifad |
|
12 |
|
ringrng |
|
13 |
11 12
|
syl |
|
14 |
4 13
|
elind |
|
15 |
2 7 1
|
rngcbas |
|
16 |
14 15
|
eleqtrrd |
|
17 |
7 8 10 16
|
iszeroo |
|
18 |
5 6 17
|
mpbir2and |
|