Step |
Hyp |
Ref |
Expression |
1 |
|
ackbij.f |
|
2 |
|
simpr1 |
|
3 |
|
ackbij1lem3 |
|
4 |
2 3
|
syl |
|
5 |
|
simpr3 |
|
6 |
|
ackbij1lem1 |
|
7 |
5 6
|
syl |
|
8 |
|
inss2 |
|
9 |
7 8
|
eqsstrdi |
|
10 |
1
|
ackbij1lem12 |
|
11 |
4 9 10
|
syl2anc |
|
12 |
1
|
ackbij1lem10 |
|
13 |
12
|
ffvelrni |
|
14 |
|
nnon |
|
15 |
|
onpsssuc |
|
16 |
4 13 14 15
|
4syl |
|
17 |
1
|
ackbij1lem14 |
|
18 |
2 17
|
syl |
|
19 |
18
|
psseq2d |
|
20 |
16 19
|
mpbird |
|
21 |
|
simpll |
|
22 |
|
inss1 |
|
23 |
1
|
ackbij1lem11 |
|
24 |
21 22 23
|
sylancl |
|
25 |
|
ssun1 |
|
26 |
|
simpr2 |
|
27 |
|
ackbij1lem2 |
|
28 |
26 27
|
syl |
|
29 |
25 28
|
sseqtrrid |
|
30 |
1
|
ackbij1lem12 |
|
31 |
24 29 30
|
syl2anc |
|
32 |
20 31
|
psssstrd |
|
33 |
11 32
|
sspsstrd |
|
34 |
33
|
pssned |
|
35 |
34
|
necomd |
|
36 |
35
|
neneqd |
|