Step |
Hyp |
Ref |
Expression |
1 |
|
lautcnvle.b |
|
2 |
|
lautcnvle.l |
|
3 |
|
lautcnvle.i |
|
4 |
|
simpl |
|
5 |
1 3
|
laut1o |
|
6 |
5
|
adantr |
|
7 |
|
simprl |
|
8 |
|
f1ocnvdm |
|
9 |
6 7 8
|
syl2anc |
|
10 |
|
simprr |
|
11 |
|
f1ocnvdm |
|
12 |
6 10 11
|
syl2anc |
|
13 |
1 2 3
|
lautle |
|
14 |
4 9 12 13
|
syl12anc |
|
15 |
|
f1ocnvfv2 |
|
16 |
6 7 15
|
syl2anc |
|
17 |
|
f1ocnvfv2 |
|
18 |
6 10 17
|
syl2anc |
|
19 |
16 18
|
breq12d |
|
20 |
14 19
|
bitr2d |
|