Step |
Hyp |
Ref |
Expression |
1 |
|
tendof.h |
|
2 |
|
tendof.t |
|
3 |
|
tendof.e |
|
4 |
|
eqid |
|
5 |
|
eqid |
|
6 |
4 1 2 5 3
|
istendo |
|
7 |
|
coeq1 |
|
8 |
7
|
fveq2d |
|
9 |
|
fveq2 |
|
10 |
9
|
coeq1d |
|
11 |
8 10
|
eqeq12d |
|
12 |
|
coeq2 |
|
13 |
12
|
fveq2d |
|
14 |
|
fveq2 |
|
15 |
14
|
coeq2d |
|
16 |
13 15
|
eqeq12d |
|
17 |
11 16
|
rspc2v |
|
18 |
17
|
com12 |
|
19 |
18
|
3ad2ant2 |
|
20 |
6 19
|
syl6bi |
|
21 |
20
|
3impia |
|
22 |
21
|
imp |
|