Step |
Hyp |
Ref |
Expression |
1 |
|
tsrps |
|
2 |
|
psrel |
|
3 |
1 2
|
syl |
|
4 |
|
psref2 |
|
5 |
|
inss1 |
|
6 |
4 5
|
eqsstrrdi |
|
7 |
1 6
|
syl |
|
8 |
3 7
|
jca |
|
9 |
|
pstr2 |
|
10 |
1 9
|
syl |
|
11 |
|
psdmrn |
|
12 |
1 11
|
syl |
|
13 |
12
|
simpld |
|
14 |
13
|
sqxpeqd |
|
15 |
|
eqid |
|
16 |
15
|
istsr |
|
17 |
16
|
simprbi |
|
18 |
|
relcoi2 |
|
19 |
3 18
|
syl |
|
20 |
|
cnvresid |
|
21 |
|
cnvss |
|
22 |
7 21
|
syl |
|
23 |
20 22
|
eqsstrrid |
|
24 |
|
coss1 |
|
25 |
23 24
|
syl |
|
26 |
19 25
|
eqsstrrd |
|
27 |
|
relcnv |
|
28 |
|
relcoi1 |
|
29 |
27 28
|
ax-mp |
|
30 |
|
relcnvfld |
|
31 |
3 30
|
syl |
|
32 |
31
|
reseq2d |
|
33 |
32 7
|
eqsstrrd |
|
34 |
|
coss2 |
|
35 |
33 34
|
syl |
|
36 |
29 35
|
eqsstrrid |
|
37 |
26 36
|
unssd |
|
38 |
17 37
|
sstrd |
|
39 |
14 38
|
eqsstrrd |
|
40 |
10 39
|
jca |
|
41 |
|
eqid |
|
42 |
41
|
isdir |
|
43 |
8 40 42
|
mpbir2and |
|