Step |
Hyp |
Ref |
Expression |
1 |
|
sssucid |
|
2 |
|
idn1 |
|
3 |
|
idn1 |
|
4 |
|
simpl |
|
5 |
3 4
|
el1 |
|
6 |
|
idn1 |
|
7 |
|
trel |
|
8 |
7
|
3impib |
|
9 |
2 5 6 8
|
el123 |
|
10 |
|
ssel2 |
|
11 |
1 9 10
|
el0321old |
|
12 |
11
|
int3 |
|
13 |
|
idn1 |
|
14 |
|
eleq2 |
|
15 |
14
|
biimpac |
|
16 |
5 13 15
|
el12 |
|
17 |
1 16 10
|
el021old |
|
18 |
17
|
int2 |
|
19 |
|
simpr |
|
20 |
3 19
|
el1 |
|
21 |
|
elsuci |
|
22 |
20 21
|
el1 |
|
23 |
|
jao |
|
24 |
23
|
3imp |
|
25 |
12 18 22 24
|
el2122old |
|
26 |
25
|
int2 |
|
27 |
26
|
gen12 |
|
28 |
|
dftr2 |
|
29 |
28
|
biimpri |
|
30 |
27 29
|
el1 |
|
31 |
30
|
in1 |
|