Step |
Hyp |
Ref |
Expression |
1 |
|
tfindes.1 |
|
2 |
|
tfindes.2 |
|
3 |
|
tfindes.3 |
|
4 |
|
dfsbcq |
|
5 |
|
dfsbcq |
|
6 |
|
dfsbcq |
|
7 |
|
sbceq2a |
|
8 |
|
nfv |
|
9 |
|
nfsbc1v |
|
10 |
|
nfsbc1v |
|
11 |
9 10
|
nfim |
|
12 |
8 11
|
nfim |
|
13 |
|
eleq1w |
|
14 |
|
sbceq1a |
|
15 |
|
suceq |
|
16 |
15
|
sbceq1d |
|
17 |
14 16
|
imbi12d |
|
18 |
13 17
|
imbi12d |
|
19 |
12 18 2
|
chvarfv |
|
20 |
|
cbvralsvw |
|
21 |
|
sbsbc |
|
22 |
21
|
ralbii |
|
23 |
20 22
|
bitri |
|
24 |
23 3
|
syl5bir |
|
25 |
4 5 6 7 1 19 24
|
tfinds |
|