Step |
Hyp |
Ref |
Expression |
1 |
|
ringcsect.c |
|
2 |
|
ringcsect.b |
|
3 |
|
ringcsect.u |
|
4 |
|
ringcsect.x |
|
5 |
|
ringcsect.y |
|
6 |
|
ringciso.n |
|
7 |
|
eqid |
|
8 |
1
|
ringccat |
|
9 |
3 8
|
syl |
|
10 |
2 7 9 4 5 6
|
isoval |
|
11 |
10
|
eleq2d |
|
12 |
2 7 9 4 5
|
invfun |
|
13 |
|
funfvbrb |
|
14 |
12 13
|
syl |
|
15 |
1 2 3 4 5 7
|
ringcinv |
|
16 |
|
simpl |
|
17 |
15 16
|
syl6bi |
|
18 |
14 17
|
sylbid |
|
19 |
|
eqid |
|
20 |
1 2 3 4 5 7
|
ringcinv |
|
21 |
|
funrel |
|
22 |
12 21
|
syl |
|
23 |
|
releldm |
|
24 |
23
|
ex |
|
25 |
22 24
|
syl |
|
26 |
20 25
|
sylbird |
|
27 |
19 26
|
mpan2i |
|
28 |
18 27
|
impbid |
|
29 |
11 28
|
bitrd |
|