Step |
Hyp |
Ref |
Expression |
1 |
|
fsumcncf.x |
|
2 |
|
fsumcncf.a |
|
3 |
|
fsumcncf.cncf |
|
4 |
|
eqid |
|
5 |
4
|
cnfldtopon |
|
6 |
5
|
a1i |
|
7 |
|
resttopon |
|
8 |
6 1 7
|
syl2anc |
|
9 |
|
ssidd |
|
10 |
|
eqid |
|
11 |
4
|
cnfldtop |
|
12 |
|
unicntop |
|
13 |
12
|
restid |
|
14 |
11 13
|
ax-mp |
|
15 |
14
|
eqcomi |
|
16 |
4 10 15
|
cncfcn |
|
17 |
1 9 16
|
syl2anc |
|
18 |
17
|
adantr |
|
19 |
3 18
|
eleqtrd |
|
20 |
4 8 2 19
|
fsumcnf |
|
21 |
20 17
|
eleqtrrd |
|