Step |
Hyp |
Ref |
Expression |
1 |
|
rge0ssre |
|
2 |
|
fss |
|
3 |
1 2
|
mpan2 |
|
4 |
|
ffvelrn |
|
5 |
|
elrege0 |
|
6 |
5
|
baib |
|
7 |
4 6
|
syl |
|
8 |
7
|
ralbidva |
|
9 |
|
ffn |
|
10 |
|
ffnfv |
|
11 |
10
|
baib |
|
12 |
9 11
|
syl |
|
13 |
|
0cn |
|
14 |
|
fnconstg |
|
15 |
13 14
|
ax-mp |
|
16 |
|
df-0p |
|
17 |
16
|
fneq1i |
|
18 |
15 17
|
mpbir |
|
19 |
18
|
a1i |
|
20 |
|
cnex |
|
21 |
20
|
a1i |
|
22 |
|
reex |
|
23 |
22
|
a1i |
|
24 |
|
ax-resscn |
|
25 |
|
sseqin2 |
|
26 |
24 25
|
mpbi |
|
27 |
|
0pval |
|
28 |
27
|
adantl |
|
29 |
|
eqidd |
|
30 |
19 9 21 23 26 28 29
|
ofrfval |
|
31 |
8 12 30
|
3bitr4d |
|
32 |
3 31
|
biadanii |
|