Step |
Hyp |
Ref |
Expression |
1 |
|
pmtrdifel.t |
|
2 |
|
pmtrdifel.r |
|
3 |
|
pmtrdifel.0 |
|
4 |
|
eqid |
|
5 |
4 1
|
pmtrfb |
|
6 |
|
difsnexi |
|
7 |
|
f1of |
|
8 |
|
fdm |
|
9 |
|
difssd |
|
10 |
|
dmss |
|
11 |
9 10
|
syl |
|
12 |
|
difssd |
|
13 |
|
sseq1 |
|
14 |
12 13
|
mpbird |
|
15 |
11 14
|
sstrd |
|
16 |
7 8 15
|
3syl |
|
17 |
|
id |
|
18 |
|
eqid |
|
19 |
18 2
|
pmtrrn |
|
20 |
3 19
|
eqeltrid |
|
21 |
6 16 17 20
|
syl3an |
|
22 |
5 21
|
sylbi |
|