Proof of Theorem ressress
| Step | Hyp | Ref
| Expression |
| 1 | | simplr 792 |
. . . . . . . . 9
      
↾s       
      
  |
| 2 | | simpr1 1067 |
. . . . . . . . 9
      
↾s       
  
  |
| 3 | | simpr2 1068 |
. . . . . . . . 9
      
↾s       
  
  |
| 4 | | eqid 2622 |
. . . . . . . . . 10
 ↾s   ↾s   |
| 5 | | eqid 2622 |
. . . . . . . . . 10
         |
| 6 | 4, 5 | ressval2 15929 |
. . . . . . . . 9
     
  ↾s   sSet      
          |
| 7 | 1, 2, 3, 6 | syl3anc 1326 |
. . . . . . . 8
      
↾s       
   
↾s   sSet      
          |
| 8 | | inass 3823 |
. . . . . . . . . . 11
                 |
| 9 | | in12 3824 |
. . . . . . . . . . 11
                 |
| 10 | 8, 9 | eqtri 2644 |
. . . . . . . . . 10
                 |
| 11 | 4, 5 | ressbas 15930 |
. . . . . . . . . . . 12
           ↾s     |
| 12 | 3, 11 | syl 17 |
. . . . . . . . . . 11
      
↾s       
             ↾s     |
| 13 | 12 | ineq2d 3814 |
. . . . . . . . . 10
      
↾s       
                ↾s      |
| 14 | 10, 13 | syl5req 2669 |
. . . . . . . . 9
      
↾s       
        ↾s      
       |
| 15 | 14 | opeq2d 4409 |
. . . . . . . 8
      
↾s       
        
     ↾s    
        
        |
| 16 | 7, 15 | oveq12d 6668 |
. . . . . . 7
      
↾s       
     ↾s  sSet      
     ↾s     
  sSet
              sSet      
            |
| 17 | | fvex 6201 |
. . . . . . . . 9
     |
| 18 | 17 | inex2 4800 |
. . . . . . . 8
         |
| 19 | | setsabs 15902 |
. . . . . . . 8
             sSet
              sSet      
           sSet                   |
| 20 | 2, 18, 19 | sylancl 694 |
. . . . . . 7
      
↾s       
     sSet              
sSet         
        sSet      
            |
| 21 | 16, 20 | eqtrd 2656 |
. . . . . 6
      
↾s       
     ↾s  sSet      
     ↾s     
 sSet      
            |
| 22 | | simpll 790 |
. . . . . . 7
      
↾s       
       ↾s     |
| 23 | | ovexd 6680 |
. . . . . . 7
      
↾s       
   
↾s    |
| 24 | | simpr3 1069 |
. . . . . . 7
      
↾s       
  
  |
| 25 | | eqid 2622 |
. . . . . . . 8
  ↾s 
↾s   
↾s 
↾s   |
| 26 | | eqid 2622 |
. . . . . . . 8
   
↾s       ↾s    |
| 27 | 25, 26 | ressval2 15929 |
. . . . . . 7
      ↾s    ↾s    
↾s 
↾s   
↾s  sSet            ↾s        |
| 28 | 22, 23, 24, 27 | syl3anc 1326 |
. . . . . 6
      
↾s       
     ↾s  ↾s    ↾s  sSet            ↾s        |
| 29 | | inss1 3833 |
. . . . . . . . 9
   |
| 30 | | sstr 3611 |
. . . . . . . . 9
     
           |
| 31 | 29, 30 | mpan2 707 |
. . . . . . . 8
      
      |
| 32 | 1, 31 | nsyl 135 |
. . . . . . 7
      
↾s       
      
    |
| 33 | | inex1g 4801 |
. . . . . . . 8
     |
| 34 | 3, 33 | syl 17 |
. . . . . . 7
      
↾s       
       |
| 35 | | eqid 2622 |
. . . . . . . 8
 ↾s     ↾s     |
| 36 | 35, 5 | ressval2 15929 |
. . . . . . 7
     
      ↾s 
   sSet      
            |
| 37 | 32, 2, 34, 36 | syl3anc 1326 |
. . . . . 6
      
↾s       
   
↾s     sSet      
            |
| 38 | 21, 28, 37 | 3eqtr4d 2666 |
. . . . 5
      
↾s       
     ↾s  ↾s   ↾s      |
| 39 | 38 | exp31 630 |
. . . 4
     ↾s         
  
↾s 
↾s   ↾s        |
| 40 | | ovex 6678 |
. . . . . . . 8
 ↾s   |
| 41 | 25, 26 | ressid2 15928 |
. . . . . . . 8
      ↾s    ↾s    
↾s 
↾s   ↾s    |
| 42 | 40, 41 | mp3an2 1412 |
. . . . . . 7
      ↾s   
  ↾s 
↾s   ↾s    |
| 43 | 42 | 3ad2antr3 1228 |
. . . . . 6
      ↾s   
   
↾s 
↾s   ↾s    |
| 44 | | in32 3825 |
. . . . . . . . 9
                 |
| 45 | | simpr2 1068 |
. . . . . . . . . . . 12
      ↾s   
    |
| 46 | 45, 11 | syl 17 |
. . . . . . . . . . 11
      ↾s   
            ↾s     |
| 47 | | simpl 473 |
. . . . . . . . . . 11
      ↾s   
      ↾s  
  |
| 48 | 46, 47 | eqsstrd 3639 |
. . . . . . . . . 10
      ↾s   
          |
| 49 | | df-ss 3588 |
. . . . . . . . . 10
             
         |
| 50 | 48, 49 | sylib 208 |
. . . . . . . . 9
      ↾s   
                  |
| 51 | 44, 50 | syl5req 2669 |
. . . . . . . 8
      ↾s   
          
       |
| 52 | 51 | oveq2d 6666 |
. . . . . . 7
      ↾s   
   ↾s 
       ↾s   
        |
| 53 | 5 | ressinbas 15936 |
. . . . . . . 8
  ↾s   ↾s          |
| 54 | 45, 53 | syl 17 |
. . . . . . 7
      ↾s   
   ↾s   ↾s          |
| 55 | 5 | ressinbas 15936 |
. . . . . . . 8
    ↾s 
   ↾s   
        |
| 56 | 45, 33, 55 | 3syl 18 |
. . . . . . 7
      ↾s   
   ↾s 
   ↾s   
        |
| 57 | 52, 54, 56 | 3eqtr4d 2666 |
. . . . . 6
      ↾s   
   ↾s   ↾s      |
| 58 | 43, 57 | eqtrd 2656 |
. . . . 5
      ↾s   
   
↾s 
↾s   ↾s      |
| 59 | 58 | ex 450 |
. . . 4
     ↾s    

  ↾s 
↾s   ↾s       |
| 60 | 4, 5 | ressid2 15928 |
. . . . . . . 8
     
  ↾s    |
| 61 | 60 | 3adant3r3 1276 |
. . . . . . 7
     

 
 ↾s    |
| 62 | 61 | oveq1d 6665 |
. . . . . 6
     

 
  ↾s 
↾s   ↾s    |
| 63 | | inss2 3834 |
. . . . . . . . . . 11
           |
| 64 | | simpl 473 |
. . . . . . . . . . 11
     

 
      |
| 65 | 63, 64 | syl5ss 3614 |
. . . . . . . . . 10
     

 
        |
| 66 | | sseqin2 3817 |
. . . . . . . . . 10
                       |
| 67 | 65, 66 | sylib 208 |
. . . . . . . . 9
     

 
                |
| 68 | 8, 67 | syl5req 2669 |
. . . . . . . 8
     

 
        
       |
| 69 | 68 | oveq2d 6666 |
. . . . . . 7
     

 
 ↾s        
↾s            |
| 70 | | simpr3 1069 |
. . . . . . . 8
     

 
  |
| 71 | 5 | ressinbas 15936 |
. . . . . . . 8
  ↾s   ↾s          |
| 72 | 70, 71 | syl 17 |
. . . . . . 7
     

 
 ↾s   ↾s          |
| 73 | | simpr2 1068 |
. . . . . . . 8
     

 
  |
| 74 | 73, 33, 55 | 3syl 18 |
. . . . . . 7
     

 
 ↾s     ↾s            |
| 75 | 69, 72, 74 | 3eqtr4d 2666 |
. . . . . 6
     

 
 ↾s   ↾s      |
| 76 | 62, 75 | eqtrd 2656 |
. . . . 5
     

 
  ↾s 
↾s   ↾s      |
| 77 | 76 | ex 450 |
. . . 4
    
 
  
↾s 
↾s   ↾s       |
| 78 | 39, 59, 77 | pm2.61ii 177 |
. . 3
 
   ↾s  ↾s   ↾s      |
| 79 | 78 | 3expib 1268 |
. 2
  

  ↾s 
↾s   ↾s       |
| 80 | | ress0 15934 |
. . . 4
 ↾s   |
| 81 | | reldmress 15926 |
. . . . . 6
↾s |
| 82 | 81 | ovprc1 6684 |
. . . . 5
  ↾s    |
| 83 | 82 | oveq1d 6665 |
. . . 4
  
↾s 
↾s   ↾s    |
| 84 | 81 | ovprc1 6684 |
. . . 4
  ↾s      |
| 85 | 80, 83, 84 | 3eqtr4a 2682 |
. . 3
  
↾s 
↾s   ↾s      |
| 86 | 85 | a1d 25 |
. 2
  

  ↾s 
↾s   ↾s       |
| 87 | 79, 86 | pm2.61i 176 |
1
 
   ↾s  ↾s   ↾s      |