Step |
Hyp |
Ref |
Expression |
1 |
|
suppcoss.f |
|
2 |
|
suppcoss.g |
|
3 |
|
suppcoss.b |
|
4 |
|
suppcoss.y |
|
5 |
|
suppcoss.1 |
|
6 |
|
dffn3 |
|
7 |
1 6
|
sylib |
|
8 |
7 2
|
fcod |
|
9 |
|
eldif |
|
10 |
2
|
ffnd |
|
11 |
|
elsuppfn |
|
12 |
10 3 4 11
|
syl3anc |
|
13 |
12
|
notbid |
|
14 |
13
|
anbi2d |
|
15 |
|
annotanannot |
|
16 |
14 15
|
bitrdi |
|
17 |
9 16
|
syl5bb |
|
18 |
|
nne |
|
19 |
18
|
anbi2i |
|
20 |
2
|
adantr |
|
21 |
|
simprl |
|
22 |
20 21
|
fvco3d |
|
23 |
|
simprr |
|
24 |
23
|
fveq2d |
|
25 |
5
|
adantr |
|
26 |
22 24 25
|
3eqtrd |
|
27 |
26
|
ex |
|
28 |
19 27
|
syl5bi |
|
29 |
17 28
|
sylbid |
|
30 |
29
|
imp |
|
31 |
8 30
|
suppss |
|