Step |
Hyp |
Ref |
Expression |
1 |
|
inclfusubc.j |
|
2 |
|
inclfusubc.s |
|
3 |
|
inclfusubc.b |
|
4 |
|
inclfusubc.f |
|
5 |
|
inclfusubc.g |
|
6 |
|
fthfunc |
|
7 |
|
eqid |
|
8 |
2 7
|
rescfth |
|
9 |
1 8
|
syl |
|
10 |
6 9
|
sselid |
|
11 |
|
df-br |
|
12 |
4 5
|
opeq12d |
|
13 |
2 7 3
|
idfusubc |
|
14 |
1 13
|
syl |
|
15 |
12 14
|
eqtr4d |
|
16 |
15
|
eleq1d |
|
17 |
11 16
|
syl5bb |
|
18 |
10 17
|
mpbird |
|