Step |
Hyp |
Ref |
Expression |
1 |
|
elxp7 |
|
2 |
1
|
anbi1i |
|
3 |
|
ssel |
|
4 |
3
|
pm4.71rd |
|
5 |
4
|
anbi2d |
|
6 |
|
anass |
|
7 |
6
|
bicomi |
|
8 |
7
|
a1i |
|
9 |
|
anass |
|
10 |
9
|
anbi1i |
|
11 |
10
|
a1i |
|
12 |
5 8 11
|
3bitrd |
|
13 |
2 12
|
bitr4id |
|
14 |
|
ancom |
|
15 |
|
anass |
|
16 |
13 14 15
|
3bitr3g |
|
17 |
|
cnvresima |
|
18 |
17
|
eleq2i |
|
19 |
|
elin |
|
20 |
|
vex |
|
21 |
|
fo2nd |
|
22 |
|
fofn |
|
23 |
|
elpreima |
|
24 |
21 22 23
|
mp2b |
|
25 |
20 24
|
mpbiran |
|
26 |
25
|
anbi1i |
|
27 |
18 19 26
|
3bitri |
|
28 |
|
elxp7 |
|
29 |
16 27 28
|
3bitr4g |
|
30 |
29
|
eqrdv |
|