Step |
Hyp |
Ref |
Expression |
1 |
|
fsumreclf.k |
|
2 |
|
fsumreclf.a |
|
3 |
|
fsumreclf.b |
|
4 |
|
csbeq1a |
|
5 |
|
nfcv |
|
6 |
|
nfcv |
|
7 |
|
nfcv |
|
8 |
|
nfcsb1v |
|
9 |
4 5 6 7 8
|
cbvsum |
|
10 |
9
|
a1i |
|
11 |
|
nfv |
|
12 |
1 11
|
nfan |
|
13 |
8
|
nfel1 |
|
14 |
12 13
|
nfim |
|
15 |
|
eleq1w |
|
16 |
15
|
anbi2d |
|
17 |
4
|
eleq1d |
|
18 |
16 17
|
imbi12d |
|
19 |
14 18 3
|
chvarfv |
|
20 |
2 19
|
fsumrecl |
|
21 |
10 20
|
eqeltrd |
|