| Step | Hyp | Ref
| Expression |
| 1 | | seqf1o.4 |
. . 3
       |
| 2 | | eluzfz2 12349 |
. . 3
    
      |
| 3 | 1, 2 | syl 17 |
. 2
       |
| 4 | | fveq2 6191 |
. . . . . 6
               |
| 5 | 4 | oveq2d 6666 |
. . . . 5
     
           
         |
| 6 | 4 | oveq1d 6665 |
. . . . 5
       
       
           |
| 7 | 5, 6 | eqeq12d 2637 |
. . . 4
                                                     |
| 8 | 7 | imbi2d 330 |
. . 3
  
      
           
      
      
           
         |
| 9 | | fveq2 6191 |
. . . . . 6
               |
| 10 | 9 | oveq2d 6666 |
. . . . 5
     
           
         |
| 11 | 9 | oveq1d 6665 |
. . . . 5
       
       
           |
| 12 | 10, 11 | eqeq12d 2637 |
. . . 4
                                                     |
| 13 | 12 | imbi2d 330 |
. . 3
  
      
           
      
      
           
         |
| 14 | | fveq2 6191 |
. . . . . 6
                   |
| 15 | 14 | oveq2d 6666 |
. . . . 5
       
           
           |
| 16 | 14 | oveq1d 6665 |
. . . . 5
         
       
             |
| 17 | 15, 16 | eqeq12d 2637 |
. . . 4
                                                           |
| 18 | 17 | imbi2d 330 |
. . 3
    
      
           
      
      
                         |
| 19 | | fveq2 6191 |
. . . . . 6
               |
| 20 | 19 | oveq2d 6666 |
. . . . 5
     
           
         |
| 21 | 19 | oveq1d 6665 |
. . . . 5
       
       
           |
| 22 | 20, 21 | eqeq12d 2637 |
. . . 4
                                                     |
| 23 | 22 | imbi2d 330 |
. . 3
  
      
           
      
      
           
         |
| 24 | | seqf1o.2 |
. . . . 5
 

        |
| 25 | | seqf1olem2a.1 |
. . . . . 6
       |
| 26 | | seqf1olem2a.3 |
. . . . . 6
   |
| 27 | 25, 26 | ffvelrnd 6360 |
. . . . 5
       |
| 28 | | eluzel2 11692 |
. . . . . . 7
    
  |
| 29 | | seq1 12814 |
. . . . . . 7
             |
| 30 | 1, 28, 29 | 3syl 18 |
. . . . . 6
             |
| 31 | | seqf1olem2a.4 |
. . . . . . . 8
    
  |
| 32 | | eluzfz1 12348 |
. . . . . . . . 9
    
      |
| 33 | 1, 32 | syl 17 |
. . . . . . . 8
       |
| 34 | 31, 33 | sseldd 3604 |
. . . . . . 7
   |
| 35 | 25, 34 | ffvelrnd 6360 |
. . . . . 6
       |
| 36 | 30, 35 | eqeltrd 2701 |
. . . . 5
         |
| 37 | 24, 27, 36 | caovcomd 6830 |
. . . 4
                           |
| 38 | 37 | a1i 11 |
. . 3
    
                            |
| 39 | | oveq1 6657 |
. . . . . 6
     
                  
     
                                    |
| 40 | | elfzouz 12474 |
. . . . . . . . . . 11
  ..^
      |
| 41 | 40 | adantl 482 |
. . . . . . . . . 10
 
 ..^        |
| 42 | | seqp1 12816 |
. . . . . . . . . 10
    
              
         |
| 43 | 41, 42 | syl 17 |
. . . . . . . . 9
 
 ..^   
            
         |
| 44 | 43 | oveq2d 6666 |
. . . . . . . 8
 
 ..^                    
      
          |
| 45 | | seqf1o.3 |
. . . . . . . . . 10
 

            |
| 46 | 45 | adantlr 751 |
. . . . . . . . 9
    ..^  
            |
| 47 | | seqf1o.5 |
. . . . . . . . . . 11

  |
| 48 | 47, 27 | sseldd 3604 |
. . . . . . . . . 10
       |
| 49 | 48 | adantr 481 |
. . . . . . . . 9
 
 ..^        |
| 50 | 47 | adantr 481 |
. . . . . . . . . . . 12
 
 ..^    |
| 51 | 50 | adantr 481 |
. . . . . . . . . . 11
    ..^         |
| 52 | 25 | adantr 481 |
. . . . . . . . . . . . 13
 
 ..^        |
| 53 | 52 | adantr 481 |
. . . . . . . . . . . 12
    ..^             |
| 54 | | elfzouz2 12484 |
. . . . . . . . . . . . . . . 16
  ..^
      |
| 55 | 54 | adantl 482 |
. . . . . . . . . . . . . . 15
 
 ..^        |
| 56 | | fzss2 12381 |
. . . . . . . . . . . . . . 15
    
          |
| 57 | 55, 56 | syl 17 |
. . . . . . . . . . . . . 14
 
 ..^            |
| 58 | 31 | adantr 481 |
. . . . . . . . . . . . . 14
 
 ..^        |
| 59 | 57, 58 | sstrd 3613 |
. . . . . . . . . . . . 13
 
 ..^        |
| 60 | 59 | sselda 3603 |
. . . . . . . . . . . 12
    ..^         |
| 61 | 53, 60 | ffvelrnd 6360 |
. . . . . . . . . . 11
    ..^             |
| 62 | 51, 61 | sseldd 3604 |
. . . . . . . . . 10
    ..^             |
| 63 | | seqf1o.1 |
. . . . . . . . . . 11
 

      |
| 64 | 63 | adantlr 751 |
. . . . . . . . . 10
    ..^         |
| 65 | 41, 62, 64 | seqcl 12821 |
. . . . . . . . 9
 
 ..^   
      |
| 66 | | fzofzp1 12565 |
. . . . . . . . . . . . 13
  ..^
        |
| 67 | 66 | adantl 482 |
. . . . . . . . . . . 12
 
 ..^          |
| 68 | 58, 67 | sseldd 3604 |
. . . . . . . . . . 11
 
 ..^      |
| 69 | 52, 68 | ffvelrnd 6360 |
. . . . . . . . . 10
 
 ..^     
    |
| 70 | 50, 69 | sseldd 3604 |
. . . . . . . . 9
 
 ..^     
    |
| 71 | 46, 49, 65, 70 | caovassd 6833 |
. . . . . . . 8
 
 ..^         
    
                  
          |
| 72 | 44, 71 | eqtr4d 2659 |
. . . . . . 7
 
 ..^                                      |
| 73 | 46, 65, 70, 49 | caovassd 6833 |
. . . . . . . 8
 
 ..^         
                  
               |
| 74 | 43 | oveq1d 6665 |
. . . . . . . 8
 
 ..^                       
              |
| 75 | 46, 65, 49, 70 | caovassd 6833 |
. . . . . . . . 9
 
 ..^         
                  
               |
| 76 | 24 | adantlr 751 |
. . . . . . . . . . 11
    ..^           |
| 77 | 27 | adantr 481 |
. . . . . . . . . . 11
 
 ..^        |
| 78 | 76, 69, 77 | caovcomd 6830 |
. . . . . . . . . 10
 
 ..^                      
     |
| 79 | 78 | oveq2d 6666 |
. . . . . . . . 9
 
 ..^        
                   
               |
| 80 | 75, 79 | eqtr4d 2659 |
. . . . . . . 8
 
 ..^         
                  
               |
| 81 | 73, 74, 80 | 3eqtr4d 2666 |
. . . . . . 7
 
 ..^                       
              |
| 82 | 72, 81 | eqeq12d 2637 |
. . . . . 6
 
 ..^         
                                                                |
| 83 | 39, 82 | syl5ibr 236 |
. . . . 5
 
 ..^         
           
                                    |
| 84 | 83 | expcom 451 |
. . . 4
  ..^
                         
    
                           |
| 85 | 84 | a2d 29 |
. . 3
  ..^
                                                            |
| 86 | 8, 13, 18, 23, 38, 85 | fzind2 12586 |
. 2
                                 |
| 87 | 3, 86 | mpcom 38 |
1
                           |