Step |
Hyp |
Ref |
Expression |
1 |
|
finxpeq2 |
|
2 |
1
|
eqeq1d |
|
3 |
|
finxpeq2 |
|
4 |
3
|
eqeq1d |
|
5 |
|
finxpeq2 |
|
6 |
5
|
eqeq1d |
|
7 |
|
finxpeq2 |
|
8 |
7
|
eqeq1d |
|
9 |
|
finxp0 |
|
10 |
|
suceq |
|
11 |
|
df-1o |
|
12 |
10 11
|
eqtr4di |
|
13 |
|
finxpeq2 |
|
14 |
12 13
|
syl |
|
15 |
|
finxp1o |
|
16 |
14 15
|
eqtrdi |
|
17 |
16
|
adantl |
|
18 |
|
finxpsuc |
|
19 |
|
xp0 |
|
20 |
18 19
|
eqtrdi |
|
21 |
17 20
|
pm2.61dane |
|
22 |
21
|
a1d |
|
23 |
2 4 6 8 9 22
|
finds |
|
24 |
|
finxpnom |
|
25 |
23 24
|
pm2.61i |
|