Step |
Hyp |
Ref |
Expression |
1 |
|
ttukeylem.1 |
|
2 |
|
ttukeylem.2 |
|
3 |
|
ttukeylem.3 |
|
4 |
|
ttukeylem.4 |
|
5 |
|
sseq2 |
|
6 |
|
fveq2 |
|
7 |
6
|
sseq2d |
|
8 |
5 7
|
imbi12d |
|
9 |
8
|
imbi2d |
|
10 |
|
sseq2 |
|
11 |
|
fveq2 |
|
12 |
11
|
sseq2d |
|
13 |
10 12
|
imbi12d |
|
14 |
13
|
imbi2d |
|
15 |
|
r19.21v |
|
16 |
|
onsseleq |
|
17 |
16
|
ad4ant23 |
|
18 |
|
sseq2 |
|
19 |
|
sseq2 |
|
20 |
4
|
tfr1 |
|
21 |
|
simplr |
|
22 |
|
onss |
|
23 |
21 22
|
syl |
|
24 |
|
simprr |
|
25 |
|
fnfvima |
|
26 |
20 23 24 25
|
mp3an2i |
|
27 |
|
elssuni |
|
28 |
26 27
|
syl |
|
29 |
|
n0i |
|
30 |
|
iffalse |
|
31 |
24 29 30
|
3syl |
|
32 |
28 31
|
sseqtrrd |
|
33 |
32
|
adantr |
|
34 |
24
|
adantr |
|
35 |
|
elssuni |
|
36 |
34 35
|
syl |
|
37 |
|
sseq2 |
|
38 |
|
fveq2 |
|
39 |
38
|
sseq2d |
|
40 |
37 39
|
imbi12d |
|
41 |
|
simplrl |
|
42 |
|
vuniex |
|
43 |
42
|
sucid |
|
44 |
|
eloni |
|
45 |
|
orduniorsuc |
|
46 |
21 44 45
|
3syl |
|
47 |
46
|
orcanai |
|
48 |
43 47
|
eleqtrrid |
|
49 |
40 41 48
|
rspcdva |
|
50 |
36 49
|
mpd |
|
51 |
|
ssun1 |
|
52 |
50 51
|
sstrdi |
|
53 |
18 19 33 52
|
ifbothda |
|
54 |
1 2 3 4
|
ttukeylem3 |
|
55 |
54
|
ad4ant13 |
|
56 |
53 55
|
sseqtrrd |
|
57 |
56
|
expr |
|
58 |
|
fveq2 |
|
59 |
|
eqimss |
|
60 |
58 59
|
syl |
|
61 |
60
|
a1i |
|
62 |
57 61
|
jaod |
|
63 |
17 62
|
sylbid |
|
64 |
63
|
ex |
|
65 |
64
|
expcom |
|
66 |
65
|
a2d |
|
67 |
15 66
|
syl5bi |
|
68 |
9 14 67
|
tfis3 |
|
69 |
68
|
expdcom |
|
70 |
69
|
3imp2 |
|