Step |
Hyp |
Ref |
Expression |
1 |
|
bcth.2 |
|
2 |
|
bcthlem.4 |
|
3 |
|
bcthlem.5 |
|
4 |
|
opabssxp |
|
5 |
|
elfvdm |
|
6 |
2 5
|
syl |
|
7 |
|
reex |
|
8 |
|
rpssre |
|
9 |
7 8
|
ssexi |
|
10 |
|
xpexg |
|
11 |
6 9 10
|
sylancl |
|
12 |
|
ssexg |
|
13 |
4 11 12
|
sylancr |
|
14 |
|
oveq2 |
|
15 |
14
|
breq2d |
|
16 |
|
fveq2 |
|
17 |
16
|
difeq2d |
|
18 |
17
|
sseq2d |
|
19 |
15 18
|
anbi12d |
|
20 |
19
|
anbi2d |
|
21 |
20
|
opabbidv |
|
22 |
|
fveq2 |
|
23 |
22
|
difeq1d |
|
24 |
23
|
sseq2d |
|
25 |
24
|
anbi2d |
|
26 |
25
|
anbi2d |
|
27 |
26
|
opabbidv |
|
28 |
21 27 3
|
ovmpog |
|
29 |
13 28
|
syl3an3 |
|
30 |
29
|
3expa |
|
31 |
30
|
ancoms |
|
32 |
31
|
eleq2d |
|
33 |
4
|
sseli |
|
34 |
|
simp1 |
|
35 |
|
1st2nd2 |
|
36 |
35
|
eleq1d |
|
37 |
|
fvex |
|
38 |
|
fvex |
|
39 |
|
eleq1 |
|
40 |
|
eleq1 |
|
41 |
39 40
|
bi2anan9 |
|
42 |
|
simpr |
|
43 |
42
|
breq1d |
|
44 |
|
oveq12 |
|
45 |
44
|
fveq2d |
|
46 |
45
|
sseq1d |
|
47 |
43 46
|
anbi12d |
|
48 |
41 47
|
anbi12d |
|
49 |
37 38 48
|
opelopaba |
|
50 |
36 49
|
bitrdi |
|
51 |
35
|
eleq1d |
|
52 |
|
opelxp |
|
53 |
51 52
|
bitr2di |
|
54 |
|
df-ov |
|
55 |
35
|
fveq2d |
|
56 |
54 55
|
eqtr4id |
|
57 |
56
|
fveq2d |
|
58 |
57
|
sseq1d |
|
59 |
58
|
anbi2d |
|
60 |
53 59
|
anbi12d |
|
61 |
|
3anass |
|
62 |
60 61
|
bitr4di |
|
63 |
50 62
|
bitrd |
|
64 |
33 34 63
|
pm5.21nii |
|
65 |
32 64
|
bitrdi |
|