Step |
Hyp |
Ref |
Expression |
1 |
|
metakunt4.1 |
|
2 |
|
metakunt4.2 |
|
3 |
|
metakunt4.3 |
|
4 |
|
metakunt4.4 |
|
5 |
|
metakunt4.5 |
|
6 |
4
|
a1i |
|
7 |
|
eqeq1 |
|
8 |
|
breq1 |
|
9 |
|
id |
|
10 |
|
oveq1 |
|
11 |
8 9 10
|
ifbieq12d |
|
12 |
7 11
|
ifbieq2d |
|
13 |
12
|
adantl |
|
14 |
2
|
nnzd |
|
15 |
5
|
elfzelzd |
|
16 |
15
|
peano2zd |
|
17 |
15 16
|
ifcld |
|
18 |
14 17
|
ifcld |
|
19 |
6 13 5 18
|
fvmptd |
|