| Step | Hyp | Ref
| Expression |
| 1 | | znchr.y |
. . . . 5
ℤ/nℤ   |
| 2 | 1 | zncrng 19893 |
. . . 4

  |
| 3 | 2 | adantr 481 |
. . 3
 
   |
| 4 | | znunit.u |
. . . 4
Unit   |
| 5 | | eqid 2622 |
. . . 4
         |
| 6 | | eqid 2622 |
. . . 4
 r   r   |
| 7 | 4, 5, 6 | crngunit 18662 |
. . 3

    
      r          |
| 8 | 3, 7 | syl 17 |
. 2
 
            r          |
| 9 | | eqid 2622 |
. . . . . . 7
         |
| 10 | | znunit.l |
. . . . . . 7
 RHom   |
| 11 | 1, 9, 10 | znzrhfo 19896 |
. . . . . 6

          |
| 12 | 11 | adantr 481 |
. . . . 5
 
           |
| 13 | | fof 6115 |
. . . . 5
                   |
| 14 | 12, 13 | syl 17 |
. . . 4
 
           |
| 15 | | ffvelrn 6357 |
. . . 4
                     |
| 16 | 14, 15 | sylancom 701 |
. . 3
 
           |
| 17 | | eqid 2622 |
. . . 4
         |
| 18 | 9, 6, 17 | dvdsr2 18647 |
. . 3
        
       r       
                        |
| 19 | 16, 18 | syl 17 |
. 2
 
        r      
                         |
| 20 | | forn 6118 |
. . . . . 6
               |
| 21 | 12, 20 | syl 17 |
. . . . 5
 
       |
| 22 | 21 | rexeqdv 3145 |
. . . 4
 
                                             |
| 23 | | ffn 6045 |
. . . . 5
           |
| 24 | | oveq1 6657 |
. . . . . . 7
                                   |
| 25 | 24 | eqeq1d 2624 |
. . . . . 6
                     
                       |
| 26 | 25 | rexrn 6361 |
. . . . 5
  
                
                        |
| 27 | 14, 23, 26 | 3syl 18 |
. . . 4
 
                                            |
| 28 | 22, 27 | bitr3d 270 |
. . 3
 
                        
                       |
| 29 | | crngring 18558 |
. . . . . . . . . 10

  |
| 30 | 3, 29 | syl 17 |
. . . . . . . . 9
 
   |
| 31 | 10 | zrhrhm 19860 |
. . . . . . . . 9

ℤring RingHom    |
| 32 | 30, 31 | syl 17 |
. . . . . . . 8
 
 ℤring
RingHom    |
| 33 | 32 | adantr 481 |
. . . . . . 7
     ℤring RingHom    |
| 34 | | simpr 477 |
. . . . . . 7
       |
| 35 | | simplr 792 |
. . . . . . 7
       |
| 36 | | zringbas 19824 |
. . . . . . . 8
  ℤring |
| 37 | | zringmulr 19827 |
. . . . . . . 8
  ℤring |
| 38 | 36, 37, 17 | rhmmul 18727 |
. . . . . . 7
  ℤring
RingHom 
                         |
| 39 | 33, 34, 35, 38 | syl3anc 1326 |
. . . . . 6
        
                    |
| 40 | 30 | adantr 481 |
. . . . . . 7
       |
| 41 | 10, 5 | zrh1 19861 |
. . . . . . 7

          |
| 42 | 40, 41 | syl 17 |
. . . . . 6
               |
| 43 | 39, 42 | eqeq12d 2637 |
. . . . 5
                                       |
| 44 | | simpll 790 |
. . . . . 6
       |
| 45 | 34, 35 | zmulcld 11488 |
. . . . . 6
         |
| 46 | | 1zzd 11408 |
. . . . . 6
       |
| 47 | 1, 10 | zndvds 19898 |
. . . . . 6
  

     
     
       |
| 48 | 44, 45, 46, 47 | syl3anc 1326 |
. . . . 5
               
       |
| 49 | 43, 48 | bitr3d 270 |
. . . 4
                         
       |
| 50 | 49 | rexbidva 3049 |
. . 3
 
                       
       |
| 51 | | simplr 792 |
. . . . . . . . . 10
          
  |
| 52 | | nn0z 11400 |
. . . . . . . . . . 11

  |
| 53 | 52 | ad2antrr 762 |
. . . . . . . . . 10
          
  |
| 54 | | gcddvds 15225 |
. . . . . . . . . 10
 
    
    |
| 55 | 51, 53, 54 | syl2anc 693 |
. . . . . . . . 9
              
    |
| 56 | 55 | simpld 475 |
. . . . . . . 8
            
  |
| 57 | 51, 53 | gcdcld 15230 |
. . . . . . . . . 10
               |
| 58 | 57 | nn0zd 11480 |
. . . . . . . . 9
               |
| 59 | 34 | adantrr 753 |
. . . . . . . . 9
          
  |
| 60 | | dvdsmultr2 15021 |
. . . . . . . . 9
   
   
       |
| 61 | 58, 59, 51, 60 | syl3anc 1326 |
. . . . . . . 8
               
     |
| 62 | 56, 61 | mpd 15 |
. . . . . . 7
            
    |
| 63 | 45 | adantrr 753 |
. . . . . . . 8
               |
| 64 | | 1zzd 11408 |
. . . . . . . 8
             |
| 65 | 55 | simprd 479 |
. . . . . . . . 9
            
  |
| 66 | | simprr 796 |
. . . . . . . . 9
                 |
| 67 | | peano2zm 11420 |
. . . . . . . . . . 11
         |
| 68 | 63, 67 | syl 17 |
. . . . . . . . . 10
                 |
| 69 | | dvdstr 15018 |
. . . . . . . . . 10
   
             
         |
| 70 | 58, 53, 68, 69 | syl3anc 1326 |
. . . . . . . . 9
                   
         |
| 71 | 65, 66, 70 | mp2and 715 |
. . . . . . . 8
            
      |
| 72 | | dvdssub2 15023 |
. . . . . . . 8
     

  
        
      |
| 73 | 58, 63, 64, 71, 72 | syl31anc 1329 |
. . . . . . 7
               
     |
| 74 | 62, 73 | mpbid 222 |
. . . . . 6
            
  |
| 75 | | dvds1 15041 |
. . . . . . 7
  
  
     |
| 76 | 57, 75 | syl 17 |
. . . . . 6
                   |
| 77 | 74, 76 | mpbid 222 |
. . . . 5
               |
| 78 | 77 | rexlimdvaa 3032 |
. . . 4
 
            |
| 79 | | simpr 477 |
. . . . . . 7
 
   |
| 80 | 52 | adantr 481 |
. . . . . . 7
 
   |
| 81 | | bezout 15260 |
. . . . . . 7
 
             |
| 82 | 79, 80, 81 | syl2anc 693 |
. . . . . 6
 
             |
| 83 | | eqeq1 2626 |
. . . . . . 7
           
         |
| 84 | 83 | 2rexbidv 3057 |
. . . . . 6
    
                    |
| 85 | 82, 84 | syl5ibcom 235 |
. . . . 5
 
    
          |
| 86 | 52 | ad3antrrr 766 |
. . . . . . . . . . 11
   

    |
| 87 | | dvdsmul1 15003 |
. . . . . . . . . . 11
 
     |
| 88 | 86, 87 | sylancom 701 |
. . . . . . . . . 10
   

      |
| 89 | | zmulcl 11426 |
. . . . . . . . . . . 12
 
     |
| 90 | 86, 89 | sylancom 701 |
. . . . . . . . . . 11
   

  
   |
| 91 | | dvdsnegb 14999 |
. . . . . . . . . . 11
  
   

 
    |
| 92 | 86, 90, 91 | syl2anc 693 |
. . . . . . . . . 10
   

    
 
    |
| 93 | 88, 92 | mpbid 222 |
. . . . . . . . 9
   

       |
| 94 | 35 | adantr 481 |
. . . . . . . . . . . . . . 15
   

    |
| 95 | 94 | zcnd 11483 |
. . . . . . . . . . . . . 14
   

    |
| 96 | | zcn 11382 |
. . . . . . . . . . . . . . 15
   |
| 97 | 96 | ad2antlr 763 |
. . . . . . . . . . . . . 14
   

    |
| 98 | 95, 97 | mulcomd 10061 |
. . . . . . . . . . . . 13
   

  
     |
| 99 | 98 | oveq1d 6665 |
. . . . . . . . . . . 12
   

                |
| 100 | 97, 95 | mulcld 10060 |
. . . . . . . . . . . . 13
   

      |
| 101 | 90 | zcnd 11483 |
. . . . . . . . . . . . 13
   

  
   |
| 102 | 100, 101 | subnegd 10399 |
. . . . . . . . . . . 12
   

      
          |
| 103 | 99, 102 | eqtr4d 2659 |
. . . . . . . . . . 11
   

                 |
| 104 | 103 | oveq2d 6666 |
. . . . . . . . . 10
   

                   
     |
| 105 | 101 | negcld 10379 |
. . . . . . . . . . 11
   

   
   |
| 106 | 100, 105 | nncand 10397 |
. . . . . . . . . 10
   

                  |
| 107 | 104, 106 | eqtrd 2656 |
. . . . . . . . 9
   

                 |
| 108 | 93, 107 | breqtrrd 4681 |
. . . . . . . 8
   

              |
| 109 | | oveq2 6658 |
. . . . . . . . 9
                       |
| 110 | 109 | breq2d 4665 |
. . . . . . . 8
           
             |
| 111 | 108, 110 | syl5ibrcom 237 |
. . . . . . 7
   

                |
| 112 | 111 | rexlimdva 3031 |
. . . . . 6
                    |
| 113 | 112 | reximdva 3017 |
. . . . 5
 
                  |
| 114 | 85, 113 | syld 47 |
. . . 4
 
    
       |
| 115 | 78, 114 | impbid 202 |
. . 3
 
            |
| 116 | 28, 50, 115 | 3bitrd 294 |
. 2
 
                             |
| 117 | 8, 19, 116 | 3bitrd 294 |
1
 
           |