| Step | Hyp | Ref
| Expression |
| 1 | | ssrab2 3687 |
. . . . . . . . . 10
   |
| 2 | | nnuz 11723 |
. . . . . . . . . 10
     |
| 3 | 1, 2 | sseqtri 3637 |
. . . . . . . . 9
       |
| 4 | | rabn0 3958 |
. . . . . . . . . 10
 
 
  |
| 5 | 4 | biimpri 218 |
. . . . . . . . 9
 
    |
| 6 | | infssuzcl 11772 |
. . . . . . . . 9
  
    
   inf 
 
     |
| 7 | 3, 5, 6 | sylancr 695 |
. . . . . . . 8
 
inf 
   
   |
| 8 | | nfrab1 3122 |
. . . . . . . . . 10
  
  |
| 9 | | nfcv 2764 |
. . . . . . . . . 10
   |
| 10 | | nfcv 2764 |
. . . . . . . . . 10
  |
| 11 | 8, 9, 10 | nfinf 8388 |
. . . . . . . . 9
 inf 
 
  |
| 12 | | nfcv 2764 |
. . . . . . . . 9
   |
| 13 | 11 | nfcsb1 3548 |
. . . . . . . . . 10
  inf      ![]_ ]_](_urbrack.gif)  |
| 14 | 13 | nfcri 2758 |
. . . . . . . . 9

inf 
    ![]_ ]_](_urbrack.gif)  |
| 15 | | csbeq1a 3542 |
. . . . . . . . . 10
 inf     inf      ![]_ ]_](_urbrack.gif)   |
| 16 | 15 | eleq2d 2687 |
. . . . . . . . 9
 inf     
inf      ![]_ ]_](_urbrack.gif)    |
| 17 | 11, 12, 14, 16 | elrabf 3360 |
. . . . . . . 8
inf 
 
  
inf 
 

inf 
    ![]_ ]_](_urbrack.gif)    |
| 18 | 7, 17 | sylib 208 |
. . . . . . 7
 
inf 
 

inf 
    ![]_ ]_](_urbrack.gif)    |
| 19 | 18 | simpld 475 |
. . . . . 6
 
inf 
     |
| 20 | 18 | simprd 479 |
. . . . . . 7
 
inf      ![]_ ]_](_urbrack.gif)   |
| 21 | 19 | nnred 11035 |
. . . . . . . . 9
 
inf 
     |
| 22 | 21 | ltnrd 10171 |
. . . . . . . 8
 
inf 
 

inf 
     |
| 23 | | eliun 4524 |
. . . . . . . . 9
   ..^inf 
    
  ..^inf 
       |
| 24 | | nfcv 2764 |
. . . . . . . . . . 11
   |
| 25 | | iundisjf.1 |
. . . . . . . . . . . 12
   |
| 26 | 25 | nfcri 2758 |
. . . . . . . . . . 11
  |
| 27 | 24, 26 | nfrex 3007 |
. . . . . . . . . 10
  
 |
| 28 | 26, 24 | nfrab 3123 |
. . . . . . . . . . . 12
  
  |
| 29 | | nfcv 2764 |
. . . . . . . . . . . 12
   |
| 30 | | nfcv 2764 |
. . . . . . . . . . . 12
  |
| 31 | 28, 29, 30 | nfinf 8388 |
. . . . . . . . . . 11
 inf 
 
  |
| 32 | 31, 30, 31 | nfbr 4699 |
. . . . . . . . . 10
 inf     inf 
 
  |
| 33 | 21 | ad2antrr 762 |
. . . . . . . . . . . 12
   
 ..^inf       
inf 
     |
| 34 | | elfzouz 12474 |
. . . . . . . . . . . . . . 15
  ..^inf 
 
        |
| 35 | 34, 2 | syl6eleqr 2712 |
. . . . . . . . . . . . . 14
  ..^inf 
 
    |
| 36 | 35 | ad2antlr 763 |
. . . . . . . . . . . . 13
   
 ..^inf       
  |
| 37 | 36 | nnred 11035 |
. . . . . . . . . . . 12
   
 ..^inf       
  |
| 38 | | simpr 477 |
. . . . . . . . . . . . . 14
   
 ..^inf       
  |
| 39 | | nfcv 2764 |
. . . . . . . . . . . . . . 15
   |
| 40 | | iundisjf.2 |
. . . . . . . . . . . . . . . 16
   |
| 41 | 40 | nfcri 2758 |
. . . . . . . . . . . . . . 15

 |
| 42 | | iundisjf.3 |
. . . . . . . . . . . . . . . 16
   |
| 43 | 42 | eleq2d 2687 |
. . . . . . . . . . . . . . 15
 
   |
| 44 | 39, 12, 41, 43 | elrabf 3360 |
. . . . . . . . . . . . . 14
  
    |
| 45 | 36, 38, 44 | sylanbrc 698 |
. . . . . . . . . . . . 13
   
 ..^inf       

   |
| 46 | | infssuzle 11771 |
. . . . . . . . . . . . 13
  
    

 
inf 
     |
| 47 | 3, 45, 46 | sylancr 695 |
. . . . . . . . . . . 12
   
 ..^inf       
inf 
     |
| 48 | | elfzolt2 12479 |
. . . . . . . . . . . . 13
  ..^inf 
 
  inf       |
| 49 | 48 | ad2antlr 763 |
. . . . . . . . . . . 12
   
 ..^inf       
inf 
 
   |
| 50 | 33, 37, 33, 47, 49 | lelttrd 10195 |
. . . . . . . . . . 11
   
 ..^inf       
inf 
   inf       |
| 51 | 50 | exp31 630 |
. . . . . . . . . 10
 
  ..^inf 
 
   inf 
 

inf 
       |
| 52 | 27, 32, 51 | rexlimd 3026 |
. . . . . . . . 9
 
   ..^inf       inf 
   inf        |
| 53 | 23, 52 | syl5bi 232 |
. . . . . . . 8
 
   ..^inf 
     inf 
   inf        |
| 54 | 22, 53 | mtod 189 |
. . . . . . 7
 
  ..^inf         |
| 55 | 20, 54 | eldifd 3585 |
. . . . . 6
 
 inf      ![]_ ]_](_urbrack.gif)
  ..^inf 
        |
| 56 | | csbeq1 3536 |
. . . . . . . . 9
 inf       ![]_ ]_](_urbrack.gif) inf      ![]_ ]_](_urbrack.gif)   |
| 57 | 31 | nfeq2 2780 |
. . . . . . . . . 10
 inf 
    |
| 58 | | nfcv 2764 |
. . . . . . . . . 10
   ..^  |
| 59 | | nfcv 2764 |
. . . . . . . . . . 11
   |
| 60 | | nfcv 2764 |
. . . . . . . . . . 11
 ..^ |
| 61 | 59, 60, 31 | nfov 6676 |
. . . . . . . . . 10
   ..^inf 
     |
| 62 | | oveq2 6658 |
. . . . . . . . . 10
 inf      ..^  ..^inf 
      |
| 63 | | eqidd 2623 |
. . . . . . . . . 10
 inf       |
| 64 | 57, 58, 61, 62, 63 | iuneq12df 4544 |
. . . . . . . . 9
 inf       ..^    ..^inf 
       |
| 65 | 56, 64 | difeq12d 3729 |
. . . . . . . 8
 inf      
 ![]_ ]_](_urbrack.gif)
  ..^    inf      ![]_ ]_](_urbrack.gif)
  ..^inf 
        |
| 66 | 65 | eleq2d 2687 |
. . . . . . 7
 inf         ![]_ ]_](_urbrack.gif)   ..^  
 inf      ![]_ ]_](_urbrack.gif)
  ..^inf 
         |
| 67 | 66 | rspcev 3309 |
. . . . . 6
 inf      inf 
 
  ![]_ ]_](_urbrack.gif)   ..^inf 
       
   ![]_ ]_](_urbrack.gif)   ..^     |
| 68 | 19, 55, 67 | syl2anc 693 |
. . . . 5
 
    ![]_ ]_](_urbrack.gif)
  ..^     |
| 69 | | nfv 1843 |
. . . . . 6

   ..^    |
| 70 | | nfcsb1v 3549 |
. . . . . . . 8
  
 ![]_ ]_](_urbrack.gif)  |
| 71 | | nfcv 2764 |
. . . . . . . . 9
   ..^  |
| 72 | 71, 40 | nfiun 4548 |
. . . . . . . 8
  
 ..^   |
| 73 | 70, 72 | nfdif 3731 |
. . . . . . 7
     ![]_ ]_](_urbrack.gif)
  ..^    |
| 74 | 73 | nfcri 2758 |
. . . . . 6

   ![]_ ]_](_urbrack.gif)   ..^    |
| 75 | | csbeq1a 3542 |
. . . . . . . 8
   ![]_ ]_](_urbrack.gif)   |
| 76 | | oveq2 6658 |
. . . . . . . . 9
  ..^  ..^   |
| 77 | 76 | iuneq1d 4545 |
. . . . . . . 8
   ..^    ..^    |
| 78 | 75, 77 | difeq12d 3729 |
. . . . . . 7
    ..^      ![]_ ]_](_urbrack.gif)
  ..^     |
| 79 | 78 | eleq2d 2687 |
. . . . . 6
     ..^  
 
 ![]_ ]_](_urbrack.gif)
  ..^      |
| 80 | 69, 74, 79 | cbvrex 3168 |
. . . . 5
   
 ..^   
   ![]_ ]_](_urbrack.gif)   ..^     |
| 81 | 68, 80 | sylibr 224 |
. . . 4
 
    ..^     |
| 82 | | eldifi 3732 |
. . . . 5
  
 ..^  
  |
| 83 | 82 | reximi 3011 |
. . . 4
   
 ..^   
  |
| 84 | 81, 83 | impbii 199 |
. . 3
 

   ..^     |
| 85 | | eliun 4524 |
. . 3
 
   |
| 86 | | eliun 4524 |
. . 3
   
 ..^   
   ..^     |
| 87 | 84, 85, 86 | 3bitr4i 292 |
. 2
 
    ..^     |
| 88 | 87 | eqriv 2619 |
1
 
   ..^    |