| Step | Hyp | Ref
| Expression |
| 1 | | sseq1 3626 |
. . . . 5
 
   |
| 2 | | fveq2 6191 |
. . . . . 6
           |
| 3 | 2 | sseq1d 3632 |
. . . . 5
     
   
           |
| 4 | 1, 3 | imbi12d 334 |
. . . 4
      
    

            |
| 5 | | sseq2 3627 |
. . . . 5
 
   |
| 6 | | fveq2 6191 |
. . . . . 6
           |
| 7 | 6 | sseq2d 3633 |
. . . . 5
     
   
           |
| 8 | 5, 7 | imbi12d 334 |
. . . 4
      
    

            |
| 9 | 4, 8 | cbvral2v 3179 |
. . 3
 
 
                           |
| 10 | | ralcom 3098 |
. . 3
 
 
                           |
| 11 | 9, 10 | bitri 264 |
. 2
 
 
                           |
| 12 | | simpl 473 |
. . . . 5
 
    |
| 13 | | ntrcls.d |
. . . . . 6
     |
| 14 | | ntrcls.r |
. . . . . 6
     |
| 15 | 13, 14 | ntrclsbex 38332 |
. . . . 5
   |
| 16 | 12, 15 | syl 17 |
. . . 4
 
    |
| 17 | | difssd 3738 |
. . . 4
 
      |
| 18 | 16, 17 | sselpwd 4807 |
. . 3
 
       |
| 19 | | elpwi 4168 |
. . . 4
 
  |
| 20 | | simpl 473 |
. . . . . 6
  
  |
| 21 | | difssd 3738 |
. . . . . 6
    
  |
| 22 | 20, 21 | sselpwd 4807 |
. . . . 5
        |
| 23 | | simpr 477 |
. . . . . . . 8
  

       |
| 24 | 23 | difeq2d 3728 |
. . . . . . 7
  

           |
| 25 | 24 | eqeq2d 2632 |
. . . . . 6
  

             |
| 26 | | eqcom 2629 |
. . . . . 6
    
      |
| 27 | 25, 26 | syl6bb 276 |
. . . . 5
  

             |
| 28 | | dfss4 3858 |
. . . . . . 7

      |
| 29 | 28 | biimpi 206 |
. . . . . 6
       |
| 30 | 29 | adantl 482 |
. . . . 5
         |
| 31 | 22, 27, 30 | rspcedvd 3317 |
. . . 4
   
     |
| 32 | 15, 19, 31 | syl2an 494 |
. . 3
 
        |
| 33 | | simpl1 1064 |
. . . . . 6
      
 
  |
| 34 | 33, 15 | syl 17 |
. . . . 5
      
 
  |
| 35 | | difssd 3738 |
. . . . 5
      
 
    |
| 36 | 34, 35 | sselpwd 4807 |
. . . 4
      
 
     |
| 37 | | elpwi 4168 |
. . . . . 6
 
  |
| 38 | | simpl 473 |
. . . . . . . 8
  
  |
| 39 | | difssd 3738 |
. . . . . . . 8
    
  |
| 40 | 38, 39 | sselpwd 4807 |
. . . . . . 7
        |
| 41 | | simpr 477 |
. . . . . . . . . 10
  

       |
| 42 | 41 | difeq2d 3728 |
. . . . . . . . 9
  

           |
| 43 | 42 | eqeq2d 2632 |
. . . . . . . 8
  

             |
| 44 | | eqcom 2629 |
. . . . . . . 8
    
      |
| 45 | 43, 44 | syl6bb 276 |
. . . . . . 7
  

             |
| 46 | | dfss4 3858 |
. . . . . . . . 9

      |
| 47 | 46 | biimpi 206 |
. . . . . . . 8
       |
| 48 | 47 | adantl 482 |
. . . . . . 7
         |
| 49 | 40, 45, 48 | rspcedvd 3317 |
. . . . . 6
   
     |
| 50 | 15, 37, 49 | syl2an 494 |
. . . . 5
 
        |
| 51 | 50 | 3ad2antl1 1223 |
. . . 4
      
 
      |
| 52 | | simp12 1092 |
. . . . . . . . 9
      

      |
| 53 | 52 | elpwid 4170 |
. . . . . . . 8
      

     |
| 54 | | simp2 1062 |
. . . . . . . . 9
      

      |
| 55 | 54 | elpwid 4170 |
. . . . . . . 8
      

     |
| 56 | | sscon34b 38317 |
. . . . . . . 8
 
         |
| 57 | 53, 55, 56 | syl2anc 693 |
. . . . . . 7
      

     
     |
| 58 | 57 | bicomd 213 |
. . . . . 6
      

      
    |
| 59 | | simp11 1091 |
. . . . . . . . . . 11
      

     |
| 60 | | ntrcls.o |
. . . . . . . . . . . 12
                    |
| 61 | 60, 13, 14 | ntrclsiex 38351 |
. . . . . . . . . . 11
       |
| 62 | 59, 61 | syl 17 |
. . . . . . . . . 10
      

         |
| 63 | | elmapi 7879 |
. . . . . . . . . 10
             |
| 64 | 62, 63 | syl 17 |
. . . . . . . . 9
      

           |
| 65 | 59, 15 | syl 17 |
. . . . . . . . . 10
      

     |
| 66 | | difssd 3738 |
. . . . . . . . . 10
      

       |
| 67 | 65, 66 | sselpwd 4807 |
. . . . . . . . 9
      

        |
| 68 | 64, 67 | ffvelrnd 6360 |
. . . . . . . 8
      

      
     |
| 69 | 68 | elpwid 4170 |
. . . . . . 7
      

      
    |
| 70 | | difssd 3738 |
. . . . . . . . . 10
      

       |
| 71 | 65, 70 | sselpwd 4807 |
. . . . . . . . 9
      

        |
| 72 | 64, 71 | ffvelrnd 6360 |
. . . . . . . 8
      

      
     |
| 73 | 72 | elpwid 4170 |
. . . . . . 7
      

      
    |
| 74 | | sscon34b 38317 |
. . . . . . 7
                         
 
       
           |
| 75 | 69, 73, 74 | syl2anc 693 |
. . . . . 6
      

                                   |
| 76 | 58, 75 | imbi12d 334 |
. . . . 5
      

                              
            |
| 77 | | simp3 1063 |
. . . . . . 7
      

       |
| 78 | | simp13 1093 |
. . . . . . 7
      

       |
| 79 | 77, 78 | sseq12d 3634 |
. . . . . 6
      

     
     |
| 80 | 77 | fveq2d 6195 |
. . . . . . 7
      

               |
| 81 | 78 | fveq2d 6195 |
. . . . . . 7
      

               |
| 82 | 80, 81 | sseq12d 3634 |
. . . . . 6
      

               
           |
| 83 | 79, 82 | imbi12d 334 |
. . . . 5
      

             
   

                |
| 84 | 60, 13, 14 | ntrclsfv1 38353 |
. . . . . . . . . 10
       |
| 85 | 59, 84 | syl 17 |
. . . . . . . . 9
      

         |
| 86 | 85 | fveq1d 6193 |
. . . . . . . 8
      

                 |
| 87 | | eqid 2622 |
. . . . . . . . 9
         |
| 88 | | eqid 2622 |
. . . . . . . . 9
                 |
| 89 | 60, 13, 65, 62, 87, 52, 88 | dssmapfv3d 38313 |
. . . . . . . 8
      

                     |
| 90 | 86, 89 | eqtr3d 2658 |
. . . . . . 7
      

                 |
| 91 | 59, 14 | syl 17 |
. . . . . . . . . 10
      

       |
| 92 | 60, 13, 91 | ntrclsfv1 38353 |
. . . . . . . . 9
      

         |
| 93 | 92 | fveq1d 6193 |
. . . . . . . 8
      

                 |
| 94 | | eqid 2622 |
. . . . . . . . 9
                 |
| 95 | 60, 13, 65, 62, 87, 54, 94 | dssmapfv3d 38313 |
. . . . . . . 8
      

                     |
| 96 | 93, 95 | eqtr3d 2658 |
. . . . . . 7
      

                 |
| 97 | 90, 96 | sseq12d 3634 |
. . . . . 6
      

                               |
| 98 | 97 | imbi2d 330 |
. . . . 5
      

             

       
            |
| 99 | 76, 83, 98 | 3bitr4d 300 |
. . . 4
      

             

            |
| 100 | 36, 51, 99 | ralxfrd2 4884 |
. . 3
 

               
               |
| 101 | 18, 32, 100 | ralxfrd2 4884 |
. 2
               
                 |
| 102 | 11, 101 | syl5bb 272 |
1
               
                 |