Step |
Hyp |
Ref |
Expression |
1 |
|
simp1 |
|
2 |
|
itcoval |
|
3 |
2
|
fveq1d |
|
4 |
1 3
|
syl |
|
5 |
|
nn0uz |
|
6 |
|
simp2 |
|
7 |
|
eqid |
|
8 |
2
|
adantr |
|
9 |
8
|
fveq1d |
|
10 |
9
|
eqeq1d |
|
11 |
10
|
biimp3a |
|
12 |
|
eqidd |
|
13 |
|
nn0p1gt0 |
|
14 |
13
|
3ad2ant2 |
|
15 |
14
|
gt0ne0d |
|
16 |
15
|
adantr |
|
17 |
|
neeq1 |
|
18 |
17
|
adantl |
|
19 |
16 18
|
mpbird |
|
20 |
19
|
neneqd |
|
21 |
20
|
iffalsed |
|
22 |
|
peano2nn0 |
|
23 |
22
|
3ad2ant2 |
|
24 |
12 21 23 1
|
fvmptd |
|
25 |
5 6 7 11 24
|
seqp1d |
|
26 |
4 25
|
eqtrd |
|