Step |
Hyp |
Ref |
Expression |
1 |
|
1xr |
|
2 |
|
pnfxr |
|
3 |
|
1rp |
|
4 |
|
pnfinf |
|
5 |
3 4
|
ax-mp |
|
6 |
|
breq1 |
|
7 |
|
breq2 |
|
8 |
6 7
|
rspc2ev |
|
9 |
1 2 5 8
|
mp3an |
|
10 |
|
rexnal |
|
11 |
|
dfrex2 |
|
12 |
11
|
rexbii |
|
13 |
|
xrsex |
|
14 |
|
xrsbas |
|
15 |
|
xrs0 |
|
16 |
|
eqid |
|
17 |
14 15 16
|
isarchi |
|
18 |
13 17
|
ax-mp |
|
19 |
18
|
notbii |
|
20 |
10 12 19
|
3bitr4i |
|
21 |
9 20
|
mpbi |
|