Step |
Hyp |
Ref |
Expression |
1 |
|
itcovalendof.a |
|
2 |
|
itcovalendof.f |
|
3 |
|
itcovalendof.n |
|
4 |
|
fveq2 |
|
5 |
4
|
feq1d |
|
6 |
|
fveq2 |
|
7 |
6
|
feq1d |
|
8 |
|
fveq2 |
|
9 |
8
|
feq1d |
|
10 |
|
fveq2 |
|
11 |
10
|
feq1d |
|
12 |
|
f1oi |
|
13 |
|
f1of |
|
14 |
12 13
|
mp1i |
|
15 |
2
|
fdmd |
|
16 |
15
|
reseq2d |
|
17 |
16
|
feq1d |
|
18 |
14 17
|
mpbird |
|
19 |
2 1
|
fexd |
|
20 |
|
itcoval0 |
|
21 |
19 20
|
syl |
|
22 |
21
|
feq1d |
|
23 |
18 22
|
mpbird |
|
24 |
2
|
ad2antrr |
|
25 |
|
simpr |
|
26 |
24 25
|
fcod |
|
27 |
19
|
ad2antrr |
|
28 |
|
simplr |
|
29 |
|
eqidd |
|
30 |
|
itcovalsucov |
|
31 |
27 28 29 30
|
syl3anc |
|
32 |
31
|
feq1d |
|
33 |
26 32
|
mpbird |
|
34 |
5 7 9 11 23 33
|
nn0indd |
|
35 |
3 34
|
mpdan |
|