Step |
Hyp |
Ref |
Expression |
1 |
|
fdifsupp.1 |
|
2 |
|
fdifsupp.2 |
|
3 |
|
fdifsupp.3 |
|
4 |
|
difssd |
|
5 |
3 4
|
fnssresd |
|
6 |
1
|
difexd |
|
7 |
|
elsuppfn |
|
8 |
5 6 2 7
|
syl3anc |
|
9 |
|
eldif |
|
10 |
9
|
anbi1i |
|
11 |
10
|
a1i |
|
12 |
|
simpr |
|
13 |
12
|
fvresd |
|
14 |
13
|
neeq1d |
|
15 |
14
|
pm5.32da |
|
16 |
|
an32 |
|
17 |
16
|
a1i |
|
18 |
11 15 17
|
3bitr4d |
|
19 |
|
eldif |
|
20 |
1
|
elexd |
|
21 |
|
elsuppfn |
|
22 |
3 20 2 21
|
syl3anc |
|
23 |
22
|
anbi1d |
|
24 |
19 23
|
bitr2id |
|
25 |
8 18 24
|
3bitrd |
|
26 |
25
|
eqrdv |
|