Step |
Hyp |
Ref |
Expression |
1 |
|
rrx2pnecoorneor.i |
|
2 |
|
rrx2pnecoorneor.b |
|
3 |
|
rrx2pnedifcoorneor.a |
|
4 |
|
rrx2pnedifcoorneorr.b |
|
5 |
|
eqid |
|
6 |
1 2 3 5
|
rrx2pnedifcoorneor |
|
7 |
|
eqcom |
|
8 |
7
|
a1i |
|
9 |
1 2
|
rrx2pyel |
|
10 |
9
|
recnd |
|
11 |
1 2
|
rrx2pyel |
|
12 |
11
|
recnd |
|
13 |
10 12
|
anim12i |
|
14 |
13
|
ancomd |
|
15 |
14
|
3adant3 |
|
16 |
|
subeq0 |
|
17 |
15 16
|
syl |
|
18 |
13
|
3adant3 |
|
19 |
|
subeq0 |
|
20 |
18 19
|
syl |
|
21 |
8 17 20
|
3bitr4d |
|
22 |
4
|
eqcomi |
|
23 |
22
|
eqeq1i |
|
24 |
21 23
|
bitrdi |
|
25 |
24
|
necon3bid |
|
26 |
25
|
orbi2d |
|
27 |
6 26
|
mpbid |
|