Step | Hyp | Ref
| Expression |
1 | | setscomd.ab |
. 2
   |
2 | | setscomd.b |
. . 3
   |
3 | | simpr 110 |
. . . . 5
 
   |
4 | 3 | neeq2d 2366 |
. . . 4
 
 
   |
5 | 3 | opeq1d 3785 |
. . . . . 6
 
   
     |
6 | 5 | oveq2d 5891 |
. . . . 5
 
   sSet
    sSet       sSet     sSet       |
7 | 5 | oveq2d 5891 |
. . . . . 6
 
  sSet      sSet       |
8 | 7 | oveq1d 5890 |
. . . . 5
 
   sSet
    sSet       sSet     sSet       |
9 | 6, 8 | eqeq12d 2192 |
. . . 4
 
    sSet     sSet       sSet     sSet       sSet     sSet  
    sSet     sSet        |
10 | 4, 9 | imbi12d 234 |
. . 3
 
     sSet     sSet       sSet     sSet      
  sSet     sSet       sSet     sSet         |
11 | | setscomd.a |
. . . 4
   |
12 | | simpr 110 |
. . . . . 6
 
   |
13 | 12 | neeq1d 2365 |
. . . . 5
 
 
   |
14 | 12 | opeq1d 3785 |
. . . . . . . 8
 
   
     |
15 | 14 | oveq2d 5891 |
. . . . . . 7
 
  sSet      sSet       |
16 | 15 | oveq1d 5890 |
. . . . . 6
 
   sSet
    sSet       sSet     sSet       |
17 | 14 | oveq2d 5891 |
. . . . . 6
 
   sSet
    sSet       sSet     sSet       |
18 | 16, 17 | eqeq12d 2192 |
. . . . 5
 
    sSet     sSet       sSet     sSet       sSet     sSet       sSet     sSet        |
19 | 13, 18 | imbi12d 234 |
. . . 4
 
     sSet     sSet       sSet     sSet      
  sSet     sSet       sSet     sSet         |
20 | | setscomd.s |
. . . . . . 7
   |
21 | 20 | adantr 276 |
. . . . . 6
 
   |
22 | | simpr 110 |
. . . . . 6
 
   |
23 | | setscomd.c |
. . . . . . 7
   |
24 | 23 | adantr 276 |
. . . . . 6
 
   |
25 | | setscomd.d |
. . . . . . 7
   |
26 | 25 | adantr 276 |
. . . . . 6
 
   |
27 | | vex 2741 |
. . . . . . 7
 |
28 | | vex 2741 |
. . . . . . 7
 |
29 | 27, 28 | setscom 12502 |
. . . . . 6
  


    sSet     sSet       sSet     sSet       |
30 | 21, 22, 24, 26, 29 | syl22anc 1239 |
. . . . 5
 
   sSet
    sSet       sSet     sSet       |
31 | 30 | ex 115 |
. . . 4
    sSet     sSet       sSet     sSet        |
32 | 11, 19, 31 | vtocld 2790 |
. . 3
    sSet     sSet       sSet     sSet        |
33 | 2, 10, 32 | vtocld 2790 |
. 2
    sSet     sSet  
    sSet     sSet        |
34 | 1, 33 | mpd 13 |
1
   sSet     sSet  
    sSet     sSet       |