Step |
Hyp |
Ref |
Expression |
1 |
|
simp1l |
|
2 |
|
simp1r |
|
3 |
|
frn |
|
4 |
3
|
3ad2ant3 |
|
5 |
|
tskwe2 |
|
6 |
1 5
|
syl |
|
7 |
|
simp2 |
|
8 |
|
trss |
|
9 |
2 7 8
|
sylc |
|
10 |
|
ssnum |
|
11 |
6 9 10
|
syl2anc |
|
12 |
|
ffn |
|
13 |
|
dffn4 |
|
14 |
12 13
|
sylib |
|
15 |
14
|
3ad2ant3 |
|
16 |
|
fodomnum |
|
17 |
11 15 16
|
sylc |
|
18 |
|
tsksdom |
|
19 |
1 7 18
|
syl2anc |
|
20 |
|
domsdomtr |
|
21 |
17 19 20
|
syl2anc |
|
22 |
|
tskssel |
|
23 |
1 4 21 22
|
syl3anc |
|
24 |
|
tskuni |
|
25 |
1 2 23 24
|
syl3anc |
|