Step | Hyp | Ref
| Expression |
1 | | df-rex 2621 |
. . . 4
 
  
     
   |
2 | | exancom 1586 |
. . . 4
                 |
3 | | vex 2863 |
. . . . . . 7
 |
4 | | elp6 4264 |
. . . . . . 7
 
P6 ∼ 1c k 
SIk ∼   k           ∼ 1c k  SIk ∼   k       |
5 | 3, 4 | ax-mp 5 |
. . . . . 6
 P6 ∼ 1c k 
SIk ∼   k           ∼ 1c k  SIk ∼   k      |
6 | | elun 3221 |
. . . . . . . 8
      ∼ 1c k  SIk ∼
  k   
      ∼ 1c k 
     SIk ∼   k      |
7 | | opkex 4114 |
. . . . . . . . . . 11
      |
8 | 7 | elcompl 3226 |
. . . . . . . . . 10
      ∼ 1c k 
     1c k    |
9 | | snex 4112 |
. . . . . . . . . . 11
 
 |
10 | | vex 2863 |
. . . . . . . . . . . 12
 |
11 | 10, 9 | opkelxpk 4249 |
. . . . . . . . . . 11
      1c k 
 1c      |
12 | 9, 11 | mpbiran2 885 |
. . . . . . . . . 10
      1c k 
1c |
13 | 8, 12 | xchbinx 301 |
. . . . . . . . 9
      ∼ 1c k 
1c |
14 | 13 | orbi1i 506 |
. . . . . . . 8
       ∼
1c
k
     
SIk ∼   k    
1c     
SIk ∼   k      |
15 | | iman 413 |
. . . . . . . . 9
 
1c     
SIk ∼   k    
1c      SIk ∼   k      |
16 | | imor 401 |
. . . . . . . . 9
 
1c     
SIk ∼   k    
1c     
SIk ∼   k      |
17 | | el1c 4140 |
. . . . . . . . . . . 12
 1c 
    |
18 | 17 | anbi1i 676 |
. . . . . . . . . . 11
 
1c      SIk ∼   k     
       SIk ∼   k      |
19 | | 19.41v 1901 |
. . . . . . . . . . 11
           SIk ∼   k   
 
       SIk ∼   k      |
20 | 18, 19 | bitr4i 243 |
. . . . . . . . . 10
 
1c      SIk ∼   k      
       SIk ∼   k      |
21 | 20 | notbii 287 |
. . . . . . . . 9
  1c  
   SIk ∼   k              SIk ∼   k      |
22 | 15, 16, 21 | 3bitr3i 266 |
. . . . . . . 8
  1c      SIk ∼   k   
  
       SIk ∼   k      |
23 | 6, 14, 22 | 3bitri 262 |
. . . . . . 7
      ∼ 1c k  SIk ∼
  k   
  
       SIk ∼   k      |
24 | 23 | albii 1566 |
. . . . . 6
       
∼ 1c k  SIk ∼   k              
SIk ∼   k      |
25 | | alnex 1543 |
. . . . . . 7
            SIk ∼   k               
SIk ∼   k      |
26 | | excom 1741 |
. . . . . . . 8
            
SIk ∼   k            
   SIk ∼   k      |
27 | | snex 4112 |
. . . . . . . . . . 11
 
 |
28 | | opkeq1 4060 |
. . . . . . . . . . . . . 14
           
     |
29 | 28 | eleq1d 2419 |
. . . . . . . . . . . . 13
        
SIk ∼   k      
   SIk ∼   k      |
30 | | vex 2863 |
. . . . . . . . . . . . . . 15
 |
31 | 30, 3 | opksnelsik 4266 |
. . . . . . . . . . . . . 14
       
SIk ∼   k     
∼   k     |
32 | | opkex 4114 |
. . . . . . . . . . . . . . 15
  
 |
33 | 32 | elcompl 3226 |
. . . . . . . . . . . . . 14
    ∼   k  
  
  k     |
34 | 31, 33 | bitri 240 |
. . . . . . . . . . . . 13
       
SIk ∼   k        k     |
35 | 29, 34 | syl6bb 252 |
. . . . . . . . . . . 12
        
SIk ∼   k        k      |
36 | 35 | notbid 285 |
. . . . . . . . . . 11
         SIk ∼   k    
   k      |
37 | 27, 36 | ceqsexv 2895 |
. . . . . . . . . 10
           SIk ∼   k   
     k     |
38 | | elin 3220 |
. . . . . . . . . . 11
      k           k     |
39 | | notnot 282 |
. . . . . . . . . . 11
      k    
   k     |
40 | 30, 3 | opkelxpk 4249 |
. . . . . . . . . . . . 13
     k 
    |
41 | 3, 40 | mpbiran2 885 |
. . . . . . . . . . . 12
     k 
  |
42 | 41 | anbi2i 675 |
. . . . . . . . . . 11
       
 k      
   |
43 | 38, 39, 42 | 3bitr3i 266 |
. . . . . . . . . 10
     
k
         |
44 | 37, 43 | bitri 240 |
. . . . . . . . 9
           SIk ∼   k   
   
   |
45 | 44 | exbii 1582 |
. . . . . . . 8
            
SIk ∼   k             |
46 | 26, 45 | bitri 240 |
. . . . . . 7
            
SIk ∼   k             |
47 | 25, 46 | xchbinx 301 |
. . . . . 6
            SIk ∼   k             |
48 | 5, 24, 47 | 3bitri 262 |
. . . . 5
 P6 ∼ 1c k 
SIk ∼   k             |
49 | 48 | con2bii 322 |
. . . 4
        P6 ∼ 1c k 
SIk ∼   k      |
50 | 1, 2, 49 | 3bitri 262 |
. . 3
 
  
P6 ∼ 1c k 
SIk ∼   k      |
51 | 3 | elimak 4260 |
. . 3
   k   
   |
52 | 3 | elcompl 3226 |
. . 3
 ∼ P6 ∼ 1c k 
SIk ∼   k    P6 ∼ 1c k 
SIk ∼   k      |
53 | 50, 51, 52 | 3bitr4i 268 |
. 2
   k ∼
P6 ∼ 1c k 
SIk ∼   k      |
54 | 53 | eqriv 2350 |
1
  k
∼ P6 ∼ 1c k 
SIk ∼   k     |