| 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 |
|