| Step | Hyp | Ref
| Expression |
| 1 | | gaset 17726 |
. . 3
    |
| 2 | | gasubg.1 |
. . . 4

↾s   |
| 3 | 2 | subggrp 17597 |
. . 3
 SubGrp 
  |
| 4 | 1, 3 | anim12ci 591 |
. 2

  SubGrp  
    |
| 5 | | eqid 2622 |
. . . . . . 7
         |
| 6 | 5 | gaf 17728 |
. . . . . 6
             |
| 7 | 6 | adantr 481 |
. . . . 5

  SubGrp  
           |
| 8 | | simpr 477 |
. . . . . . 7

  SubGrp  
SubGrp    |
| 9 | 5 | subgss 17595 |
. . . . . . 7
 SubGrp 
      |
| 10 | 8, 9 | syl 17 |
. . . . . 6

  SubGrp  
      |
| 11 | | xpss1 5228 |
. . . . . 6
    
          |
| 12 | 10, 11 | syl 17 |
. . . . 5

  SubGrp  
          |
| 13 | 7, 12 | fssresd 6071 |
. . . 4

  SubGrp  
           |
| 14 | 2 | subgbas 17598 |
. . . . . . 7
 SubGrp 
      |
| 15 | 8, 14 | syl 17 |
. . . . . 6

  SubGrp  
      |
| 16 | 15 | xpeq1d 5138 |
. . . . 5

  SubGrp  
          |
| 17 | 16 | feq2d 6031 |
. . . 4

  SubGrp  
         
                |
| 18 | 13, 17 | mpbid 222 |
. . 3

  SubGrp  
               |
| 19 | 8 | adantr 481 |
. . . . . . . 8
 
 
SubGrp    SubGrp    |
| 20 | | eqid 2622 |
. . . . . . . . 9
         |
| 21 | 20 | subg0cl 17602 |
. . . . . . . 8
 SubGrp 
      |
| 22 | 19, 21 | syl 17 |
. . . . . . 7
 
 
SubGrp          |
| 23 | | simpr 477 |
. . . . . . 7
 
 
SubGrp      |
| 24 | | ovres 6800 |
. . . . . . 7
     
                    |
| 25 | 22, 23, 24 | syl2anc 693 |
. . . . . 6
 
 
SubGrp                       |
| 26 | 2, 20 | subg0 17600 |
. . . . . . . 8
 SubGrp 
          |
| 27 | 19, 26 | syl 17 |
. . . . . . 7
 
 
SubGrp              |
| 28 | 27 | oveq1d 6665 |
. . . . . 6
 
 
SubGrp                            |
| 29 | 20 | gagrpid 17727 |
. . . . . . 7

           |
| 30 | 29 | adantlr 751 |
. . . . . 6
 
 
SubGrp            |
| 31 | 25, 28, 30 | 3eqtr3d 2664 |
. . . . 5
 
 
SubGrp                 |
| 32 | | eqimss2 3658 |
. . . . . . . . . . 11
    
      |
| 33 | 15, 32 | syl 17 |
. . . . . . . . . 10

  SubGrp  
      |
| 34 | 33 | adantr 481 |
. . . . . . . . 9
 
 
SubGrp          |
| 35 | 34 | sselda 3603 |
. . . . . . . 8
    
SubGrp           |
| 36 | 34 | sselda 3603 |
. . . . . . . 8
    
SubGrp           |
| 37 | 35, 36 | anim12dan 882 |
. . . . . . 7
    
SubGrp               
   |
| 38 | | simprl 794 |
. . . . . . . . . 10
    
SubGrp    
 
  |
| 39 | 7 | ad2antrr 762 |
. . . . . . . . . . 11
    
SubGrp    
 
           |
| 40 | 9 | ad3antlr 767 |
. . . . . . . . . . . 12
    
SubGrp    
 
      |
| 41 | | simprr 796 |
. . . . . . . . . . . 12
    
SubGrp    
 
  |
| 42 | 40, 41 | sseldd 3604 |
. . . . . . . . . . 11
    
SubGrp    
 
      |
| 43 | 23 | adantr 481 |
. . . . . . . . . . 11
    
SubGrp    
 
  |
| 44 | 39, 42, 43 | fovrnd 6806 |
. . . . . . . . . 10
    
SubGrp    
 
    |
| 45 | | ovres 6800 |
. . . . . . . . . 10
                    |
| 46 | 38, 44, 45 | syl2anc 693 |
. . . . . . . . 9
    
SubGrp    
 
      
        |
| 47 | | ovres 6800 |
. . . . . . . . . . 11
 
            |
| 48 | 41, 43, 47 | syl2anc 693 |
. . . . . . . . . 10
    
SubGrp    
 
           |
| 49 | 48 | oveq2d 6666 |
. . . . . . . . 9
    
SubGrp    
 
                         |
| 50 | | simplll 798 |
. . . . . . . . . 10
    
SubGrp    
 
    |
| 51 | 40, 38 | sseldd 3604 |
. . . . . . . . . 10
    
SubGrp    
 
      |
| 52 | | eqid 2622 |
. . . . . . . . . . 11
       |
| 53 | 5, 52 | gaass 17730 |
. . . . . . . . . 10

          
            
    |
| 54 | 50, 51, 42, 43, 53 | syl13anc 1328 |
. . . . . . . . 9
    
SubGrp    
 
               |
| 55 | 46, 49, 54 | 3eqtr4d 2666 |
. . . . . . . 8
    
SubGrp    
 
                         |
| 56 | 52 | subgcl 17604 |
. . . . . . . . . . 11
  SubGrp 
          |
| 57 | 56 | 3expb 1266 |
. . . . . . . . . 10
  SubGrp  
 
  
      |
| 58 | 19, 57 | sylan 488 |
. . . . . . . . 9
    
SubGrp    
 
  
      |
| 59 | | ovres 6800 |
. . . . . . . . 9
                  
                |
| 60 | 58, 43, 59 | syl2anc 693 |
. . . . . . . 8
    
SubGrp    
 
                         |
| 61 | 2, 52 | ressplusg 15993 |
. . . . . . . . . . 11
 SubGrp 
        |
| 62 | 61 | ad3antlr 767 |
. . . . . . . . . 10
    
SubGrp    
 
        |
| 63 | 62 | oveqd 6667 |
. . . . . . . . 9
    
SubGrp    
 
  
             |
| 64 | 63 | oveq1d 6665 |
. . . . . . . 8
    
SubGrp    
 
                              |
| 65 | 55, 60, 64 | 3eqtr2rd 2663 |
. . . . . . 7
    
SubGrp    
 
               
              |
| 66 | 37, 65 | syldan 487 |
. . . . . 6
    
SubGrp                                             |
| 67 | 66 | ralrimivva 2971 |
. . . . 5
 
 
SubGrp                               
              |
| 68 | 31, 67 | jca 554 |
. . . 4
 
 
SubGrp                
                          
               |
| 69 | 68 | ralrimiva 2966 |
. . 3

  SubGrp  

                                       
               |
| 70 | 18, 69 | jca 554 |
. 2

  SubGrp  
              
                                       
                |
| 71 | | eqid 2622 |
. . 3
         |
| 72 | | eqid 2622 |
. . 3
       |
| 73 | | eqid 2622 |
. . 3
         |
| 74 | 71, 72, 73 | isga 17724 |
. 2
       

              
                                       
                 |
| 75 | 4, 70, 74 | sylanbrc 698 |
1

  SubGrp  
       |