| Step |
Hyp |
Ref |
Expression |
| 1 |
|
lauteq.b |
|
| 2 |
|
lauteq.a |
|
| 3 |
|
lauteq.i |
|
| 4 |
|
simpl1 |
|
| 5 |
|
simpl2 |
|
| 6 |
1 2
|
atbase |
|
| 7 |
6
|
adantl |
|
| 8 |
|
simpl3 |
|
| 9 |
|
eqid |
|
| 10 |
1 9 3
|
lautle |
|
| 11 |
4 5 7 8 10
|
syl22anc |
|
| 12 |
|
breq1 |
|
| 13 |
11 12
|
sylan9bb |
|
| 14 |
13
|
bicomd |
|
| 15 |
14
|
ex |
|
| 16 |
15
|
ralimdva |
|
| 17 |
16
|
imp |
|
| 18 |
|
simpl1 |
|
| 19 |
|
simpl2 |
|
| 20 |
|
simpl3 |
|
| 21 |
1 3
|
lautcl |
|
| 22 |
18 19 20 21
|
syl21anc |
|
| 23 |
1 9 2
|
hlateq |
|
| 24 |
18 22 20 23
|
syl3anc |
|
| 25 |
17 24
|
mpbid |
|