Step | Hyp | Ref
| Expression |
1 | | ss2iundf.xph |
. . 3
|
2 | | ss2iundf.ss |
. . . . 5
|
3 | | df-ral 2917 |
. . . . . . . 8
|
4 | | ss2iundf.el |
. . . . . . . . 9
|
5 | | ss2iundf.yph |
. . . . . . . . . . . 12
|
6 | | ss2iundf.a |
. . . . . . . . . . . . 13
|
7 | 6 | nfcri 2758 |
. . . . . . . . . . . 12
|
8 | 5, 7 | nfan 1828 |
. . . . . . . . . . 11
|
9 | | simpr 477 |
. . . . . . . . . . . . . . 15
|
10 | 9 | eleq1d 2686 |
. . . . . . . . . . . . . 14
|
11 | 10 | biimprd 238 |
. . . . . . . . . . . . 13
|
12 | | ss2iundf.sub |
. . . . . . . . . . . . . . . . 17
|
13 | 12 | sseq2d 3633 |
. . . . . . . . . . . . . . . 16
|
14 | 13 | 3expa 1265 |
. . . . . . . . . . . . . . 15
|
15 | 14 | notbid 308 |
. . . . . . . . . . . . . 14
|
16 | 15 | biimpd 219 |
. . . . . . . . . . . . 13
|
17 | 11, 16 | imim12d 81 |
. . . . . . . . . . . 12
|
18 | 17 | ex 450 |
. . . . . . . . . . 11
|
19 | 8, 18 | alrimi 2082 |
. . . . . . . . . 10
|
20 | | ss2iundf.y |
. . . . . . . . . . . . 13
|
21 | | ss2iundf.yc |
. . . . . . . . . . . . 13
|
22 | 20, 21 | nfel 2777 |
. . . . . . . . . . . 12
|
23 | | ss2iundf.b |
. . . . . . . . . . . . . 14
|
24 | | ss2iundf.g |
. . . . . . . . . . . . . 14
|
25 | 23, 24 | nfss 3596 |
. . . . . . . . . . . . 13
|
26 | 25 | nfn 1784 |
. . . . . . . . . . . 12
|
27 | 22, 26 | nfim 1825 |
. . . . . . . . . . 11
|
28 | 27, 20 | spcimgft 3284 |
. . . . . . . . . 10
|
29 | 19, 4, 28 | sylc 65 |
. . . . . . . . 9
|
30 | 4, 29 | mpid 44 |
. . . . . . . 8
|
31 | 3, 30 | syl5bi 232 |
. . . . . . 7
|
32 | 31 | con2d 129 |
. . . . . 6
|
33 | | dfrex2 2996 |
. . . . . 6
|
34 | 32, 33 | syl6ibr 242 |
. . . . 5
|
35 | 2, 34 | mpd 15 |
. . . 4
|
36 | 35 | ex 450 |
. . 3
|
37 | 1, 36 | ralrimi 2957 |
. 2
|
38 | | ssel 3597 |
. . . . . . . 8
|
39 | 38 | reximi 3011 |
. . . . . . 7
|
40 | 23 | nfcri 2758 |
. . . . . . . 8
|
41 | 40 | r19.37 3086 |
. . . . . . 7
|
42 | 39, 41 | syl 17 |
. . . . . 6
|
43 | | eliun 4524 |
. . . . . 6
|
44 | 42, 43 | syl6ibr 242 |
. . . . 5
|
45 | 44 | ssrdv 3609 |
. . . 4
|
46 | 45 | ralimi 2952 |
. . 3
|
47 | | df-iun 4522 |
. . . . 5
|
48 | 47 | sseq1i 3629 |
. . . 4
|
49 | | abss 3671 |
. . . 4
|
50 | | dfss2 3591 |
. . . . . 6
|
51 | 50 | ralbii 2980 |
. . . . 5
|
52 | | ralcom4 3224 |
. . . . 5
|
53 | | ss2iundf.xc |
. . . . . . . . 9
|
54 | | ss2iundf.d |
. . . . . . . . 9
|
55 | 53, 54 | nfiun 4548 |
. . . . . . . 8
|
56 | 55 | nfcri 2758 |
. . . . . . 7
|
57 | 56 | r19.23 3022 |
. . . . . 6
|
58 | 57 | albii 1747 |
. . . . 5
|
59 | 51, 52, 58 | 3bitrri 287 |
. . . 4
|
60 | 48, 49, 59 | 3bitri 286 |
. . 3
|
61 | 46, 60 | sylibr 224 |
. 2
|
62 | 37, 61 | syl 17 |
1
|