| Step | Hyp | Ref
| Expression |
| 1 | | grpkerinj.2 |
. . . . . . . . 9
GId   |
| 2 | | grpkerinj.4 |
. . . . . . . . 9
GId   |
| 3 | 1, 2 | ghomidOLD 33688 |
. . . . . . . 8
 

GrpOpHom         |
| 4 | 3 | sneqd 4189 |
. . . . . . 7
 

GrpOpHom             |
| 5 | | grpkerinj.1 |
. . . . . . . . . 10
 |
| 6 | | grpkerinj.3 |
. . . . . . . . . 10
 |
| 7 | 5, 6 | ghomf 33689 |
. . . . . . . . 9
 

GrpOpHom         |
| 8 | | ffn 6045 |
. . . . . . . . 9
    
  |
| 9 | 7, 8 | syl 17 |
. . . . . . . 8
 

GrpOpHom     |
| 10 | 5, 1 | grpoidcl 27368 |
. . . . . . . . 9

  |
| 11 | 10 | 3ad2ant1 1082 |
. . . . . . . 8
 

GrpOpHom     |
| 12 | | fnsnfv 6258 |
. . . . . . . 8
 
               |
| 13 | 9, 11, 12 | syl2anc 693 |
. . . . . . 7
 

GrpOpHom                 |
| 14 | 4, 13 | eqtr3d 2658 |
. . . . . 6
 

GrpOpHom             |
| 15 | 14 | imaeq2d 5466 |
. . . . 5
 

GrpOpHom                       |
| 16 | 15 | adantl 482 |
. . . 4
        GrpOpHom
                       |
| 17 | 10 | snssd 4340 |
. . . . . 6

    |
| 18 | 17 | 3ad2ant1 1082 |
. . . . 5
 

GrpOpHom       |
| 19 | | f1imacnv 6153 |
. . . . 5
                        |
| 20 | 18, 19 | sylan2 491 |
. . . 4
        GrpOpHom
                  |
| 21 | 16, 20 | eqtrd 2656 |
. . 3
        GrpOpHom
              |
| 22 | 21 | expcom 451 |
. 2
 

GrpOpHom       
            |
| 23 | 7 | adantr 481 |
. . . 4
    GrpOpHom
 
                |
| 24 | | simpl2 1065 |
. . . . . . . 8
    GrpOpHom
 

 
  |
| 25 | 7 | ffvelrnda 6359 |
. . . . . . . . 9
    GrpOpHom
 
       |
| 26 | 25 | adantrr 753 |
. . . . . . . 8
    GrpOpHom
 

        |
| 27 | 7 | ffvelrnda 6359 |
. . . . . . . . 9
    GrpOpHom
 
       |
| 28 | 27 | adantrl 752 |
. . . . . . . 8
    GrpOpHom
 

        |
| 29 | | eqid 2622 |
. . . . . . . . 9
     |
| 30 | 6, 2, 29 | grpoeqdivid 33680 |
. . . . . . . 8
     
             
     
           |
| 31 | 24, 26, 28, 30 | syl3anc 1326 |
. . . . . . 7
    GrpOpHom
 

                            |
| 32 | 31 | adantlr 751 |
. . . . . 6
     GrpOpHom             
 
        
     
           |
| 33 | | eqid 2622 |
. . . . . . . . . 10
     |
| 34 | 5, 33, 29 | ghomdiv 33691 |
. . . . . . . . 9
    GrpOpHom
 

                            |
| 35 | 34 | adantlr 751 |
. . . . . . . 8
     GrpOpHom             
 
                          |
| 36 | 35 | eqeq1d 2624 |
. . . . . . 7
     GrpOpHom             
 
     
                      |
| 37 | | fvex 6201 |
. . . . . . . . . . 11
GId   |
| 38 | 2, 37 | eqeltri 2697 |
. . . . . . . . . 10
 |
| 39 | 38 | snid 4208 |
. . . . . . . . 9
   |
| 40 | | eleq1 2689 |
. . . . . . . . 9
                             |
| 41 | 39, 40 | mpbiri 248 |
. . . . . . . 8
               
         |
| 42 | | ffun 6048 |
. . . . . . . . . . . . . 14
       |
| 43 | 7, 42 | syl 17 |
. . . . . . . . . . . . 13
 

GrpOpHom  
  |
| 44 | 43 | adantr 481 |
. . . . . . . . . . . 12
    GrpOpHom
 

    |
| 45 | 5, 33 | grpodivcl 27393 |
. . . . . . . . . . . . . . 15
 
         |
| 46 | 45 | 3expb 1266 |
. . . . . . . . . . . . . 14
  
 
 
      |
| 47 | 46 | 3ad2antl1 1223 |
. . . . . . . . . . . . 13
    GrpOpHom
 

          |
| 48 | | fdm 6051 |
. . . . . . . . . . . . . . 15
       |
| 49 | 7, 48 | syl 17 |
. . . . . . . . . . . . . 14
 

GrpOpHom  
  |
| 50 | 49 | adantr 481 |
. . . . . . . . . . . . 13
    GrpOpHom
 

    |
| 51 | 47, 50 | eleqtrrd 2704 |
. . . . . . . . . . . 12
    GrpOpHom
 

          |
| 52 | | fvimacnv 6332 |
. . . . . . . . . . . 12
                                      |
| 53 | 44, 51, 52 | syl2anc 693 |
. . . . . . . . . . 11
    GrpOpHom
 

                               |
| 54 | | eleq2 2690 |
. . . . . . . . . . 11
         
             
 
         |
| 55 | 53, 54 | sylan9bb 736 |
. . . . . . . . . 10
     GrpOpHom   
                                    |
| 56 | 55 | an32s 846 |
. . . . . . . . 9
     GrpOpHom             
 
     
      
 
         |
| 57 | | elsni 4194 |
. . . . . . . . . . 11
                 |
| 58 | 5, 1, 33 | grpoeqdivid 33680 |
. . . . . . . . . . . . . 14
 
 
 
       |
| 59 | 58 | biimprd 238 |
. . . . . . . . . . . . 13
 
           |
| 60 | 59 | 3expb 1266 |
. . . . . . . . . . . 12
  
 
      
   |
| 61 | 60 | 3ad2antl1 1223 |
. . . . . . . . . . 11
    GrpOpHom
 

            |
| 62 | 57, 61 | syl5 34 |
. . . . . . . . . 10
    GrpOpHom
 

          
   |
| 63 | 62 | adantlr 751 |
. . . . . . . . 9
     GrpOpHom             
 
            |
| 64 | 56, 63 | sylbid 230 |
. . . . . . . 8
     GrpOpHom             
 
     
          |
| 65 | 41, 64 | syl5 34 |
. . . . . . 7
     GrpOpHom             
 
     
    
   |
| 66 | 36, 65 | sylbird 250 |
. . . . . 6
     GrpOpHom             
 
              
   |
| 67 | 32, 66 | sylbid 230 |
. . . . 5
     GrpOpHom             
 
            |
| 68 | 67 | ralrimivva 2971 |
. . . 4
    GrpOpHom
 
          

            |
| 69 | | dff13 6512 |
. . . 4
    
     

        
    |
| 70 | 23, 68, 69 | sylanbrc 698 |
. . 3
    GrpOpHom
 
                |
| 71 | 70 | ex 450 |
. 2
 

GrpOpHom            
       |
| 72 | 22, 71 | impbid 202 |
1
 

GrpOpHom       
            |