| Step | Hyp | Ref
| Expression |
| 1 | | simpl3 1066 |
. . . . 5
  


  |
| 2 | | gsumconst.b |
. . . . . 6
     |
| 3 | | eqid 2622 |
. . . . . 6
         |
| 4 | | gsumconst.m |
. . . . . 6
.g   |
| 5 | 2, 3, 4 | mulg0 17546 |
. . . . 5
 
       |
| 6 | 1, 5 | syl 17 |
. . . 4
  

         |
| 7 | | fveq2 6191 |
. . . . . . 7

          |
| 8 | 7 | adantl 482 |
. . . . . 6
  

           |
| 9 | | hash0 13158 |
. . . . . 6
     |
| 10 | 8, 9 | syl6eq 2672 |
. . . . 5
  

       |
| 11 | 10 | oveq1d 6665 |
. . . 4
  

     
     |
| 12 | | mpteq1 4737 |
. . . . . . . 8

      |
| 13 | 12 | adantl 482 |
. . . . . . 7
  

       |
| 14 | | mpt0 6021 |
. . . . . . 7
   |
| 15 | 13, 14 | syl6eq 2672 |
. . . . . 6
  

     |
| 16 | 15 | oveq2d 6666 |
. . . . 5
  

  g     g    |
| 17 | 3 | gsum0 17278 |
. . . . 5
 g       |
| 18 | 16, 17 | syl6eq 2672 |
. . . 4
  

  g          |
| 19 | 6, 11, 18 | 3eqtr4rd 2667 |
. . 3
  

  g        
   |
| 20 | 19 | ex 450 |
. 2
 
 
 g        
    |
| 21 | | simprl 794 |
. . . . . . . 8
  
                          |
| 22 | | nnuz 11723 |
. . . . . . . 8
     |
| 23 | 21, 22 | syl6eleq 2711 |
. . . . . . 7
  
                              |
| 24 | | simpr 477 |
. . . . . . . . 9
   

                           
          |
| 25 | | simpl3 1066 |
. . . . . . . . . 10
  
                   
  |
| 26 | 25 | adantr 481 |
. . . . . . . . 9
   

                           
  |
| 27 | | eqid 2622 |
. . . . . . . . . 10
                     |
| 28 | 27 | fvmpt2 6291 |
. . . . . . . . 9
                           |
| 29 | 24, 26, 28 | syl2anc 693 |
. . . . . . . 8
   

                           
                |
| 30 | | f1of 6137 |
. . . . . . . . . . . . 13
            
              |
| 31 | 30 | ad2antll 765 |
. . . . . . . . . . . 12
  
                                  |
| 32 | 31 | ffvelrnda 6359 |
. . . . . . . . . . 11
   

                           
      |
| 33 | 31 | feqmptd 6249 |
. . . . . . . . . . 11
  
                                    |
| 34 | | eqidd 2623 |
. . . . . . . . . . 11
  
                          |
| 35 | | eqidd 2623 |
. . . . . . . . . . 11
       |
| 36 | 32, 33, 34, 35 | fmptco 6396 |
. . . . . . . . . 10
  
                                    |
| 37 | 36 | fveq1d 6193 |
. . . . . . . . 9
  
                                            |
| 38 | 37 | adantr 481 |
. . . . . . . 8
   

                           
                        |
| 39 | | elfznn 12370 |
. . . . . . . . 9
           |
| 40 | | fvconst2g 6467 |
. . . . . . . . 9
 
           |
| 41 | 25, 39, 40 | syl2an 494 |
. . . . . . . 8
   

                           
          |
| 42 | 29, 38, 41 | 3eqtr4d 2666 |
. . . . . . 7
   

                           
                  |
| 43 | 23, 42 | seqfveq 12825 |
. . . . . 6
  
                                                            |
| 44 | | eqid 2622 |
. . . . . . 7
       |
| 45 | | eqid 2622 |
. . . . . . 7
Cntz  Cntz   |
| 46 | | simpl1 1064 |
. . . . . . 7
  
                   
  |
| 47 | | simpl2 1065 |
. . . . . . 7
  
                   
  |
| 48 | 25 | adantr 481 |
. . . . . . . 8
   

                      |
| 49 | | eqid 2622 |
. . . . . . . 8
     |
| 50 | 48, 49 | fmptd 6385 |
. . . . . . 7
  
                            |
| 51 | | eqidd 2623 |
. . . . . . . . . 10
  
                                    |
| 52 | 2, 44, 45 | elcntzsn 17758 |
. . . . . . . . . . 11
 
 Cntz      

                  |
| 53 | 25, 52 | syl 17 |
. . . . . . . . . 10
  
                      Cntz                          |
| 54 | 25, 51, 53 | mpbir2and 957 |
. . . . . . . . 9
  
                   
 Cntz         |
| 55 | 54 | snssd 4340 |
. . . . . . . 8
  
                       Cntz         |
| 56 | | snidg 4206 |
. . . . . . . . . . . 12
     |
| 57 | 25, 56 | syl 17 |
. . . . . . . . . . 11
  
                   
    |
| 58 | 57 | adantr 481 |
. . . . . . . . . 10
   

                        |
| 59 | 58, 49 | fmptd 6385 |
. . . . . . . . 9
  
                              |
| 60 | | frn 6053 |
. . . . . . . . 9
        

     |
| 61 | 59, 60 | syl 17 |
. . . . . . . 8
  
                          |
| 62 | 45 | cntzidss 17770 |
. . . . . . . 8
     Cntz           
   Cntz         |
| 63 | 55, 61, 62 | syl2anc 693 |
. . . . . . 7
  
                       Cntz         |
| 64 | | f1of1 6136 |
. . . . . . . 8
            
              |
| 65 | 64 | ad2antll 765 |
. . . . . . 7
  
                                  |
| 66 | | suppssdm 7308 |
. . . . . . . . 9
   supp         |
| 67 | 49 | dmmptss 5631 |
. . . . . . . . . 10
 
 |
| 68 | 67 | a1i 11 |
. . . . . . . . 9
  
                        |
| 69 | 66, 68 | syl5ss 3614 |
. . . . . . . 8
  
                       supp        |
| 70 | | f1ofo 6144 |
. . . . . . . . . 10
            
              |
| 71 | | forn 6118 |
. . . . . . . . . 10
            
  |
| 72 | 70, 71 | syl 17 |
. . . . . . . . 9
            
  |
| 73 | 72 | ad2antll 765 |
. . . . . . . 8
  
                   
  |
| 74 | 69, 73 | sseqtr4d 3642 |
. . . . . . 7
  
                       supp     
  |
| 75 | | eqid 2622 |
. . . . . . 7
     supp           supp       |
| 76 | 2, 3, 44, 45, 46, 47, 50, 63, 21, 65, 74, 75 | gsumval3 18308 |
. . . . . 6
  
                     g                         |
| 77 | | eqid 2622 |
. . . . . . . 8
                         |
| 78 | 2, 44, 4, 77 | mulgnn 17547 |
. . . . . . 7
     
     

                     |
| 79 | 21, 25, 78 | syl2anc 693 |
. . . . . 6
  
                        

                     |
| 80 | 43, 76, 79 | 3eqtr4d 2666 |
. . . . 5
  
                     g        
   |
| 81 | 80 | expr 643 |
. . . 4
  
                    g             |
| 82 | 81 | exlimdv 1861 |
. . 3
  
                   
 g        
    |
| 83 | 82 | expimpd 629 |
. 2
 
                      g             |
| 84 | | fz1f1o 14441 |
. . 3
 
                      |
| 85 | 84 | 3ad2ant2 1083 |
. 2
 
 
                      |
| 86 | 20, 83, 85 | mpjaod 396 |
1
 
  g        
   |