Proof of Theorem ringcinv
| Step | Hyp | Ref
| Expression |
| 1 | | ringcsect.b |
. . 3
     |
| 2 | | ringcinv.n |
. . 3
Inv   |
| 3 | | ringcsect.u |
. . . 4
   |
| 4 | | ringcsect.c |
. . . . 5
RingCat   |
| 5 | 4 | ringccat 42024 |
. . . 4
   |
| 6 | 3, 5 | syl 17 |
. . 3
   |
| 7 | | ringcsect.x |
. . 3
   |
| 8 | | ringcsect.y |
. . 3
   |
| 9 | | eqid 2622 |
. . 3
Sect  Sect   |
| 10 | 1, 2, 6, 7, 8, 9 | isinv 16420 |
. 2
            Sect        Sect         |
| 11 | | eqid 2622 |
. . . . . 6
         |
| 12 | 4, 1, 3, 7, 8, 11,
9 | ringcsect 42031 |
. . . . 5
     Sect    
  RingHom

 RingHom  

         |
| 13 | | df-3an 1039 |
. . . . 5
   RingHom   RingHom
        
 
 RingHom   RingHom
 
 
        |
| 14 | 12, 13 | syl6bb 276 |
. . . 4
     Sect    
 
 RingHom   RingHom
 
 
         |
| 15 | | eqid 2622 |
. . . . . 6
         |
| 16 | 4, 1, 3, 8, 7, 15,
9 | ringcsect 42031 |
. . . . 5
     Sect    
  RingHom

 RingHom  

         |
| 17 | | 3ancoma 1045 |
. . . . . 6
   RingHom   RingHom
        
  RingHom

 RingHom  

        |
| 18 | | df-3an 1039 |
. . . . . 6
   RingHom   RingHom
        
 
 RingHom   RingHom
 
 
        |
| 19 | 17, 18 | bitri 264 |
. . . . 5
   RingHom   RingHom
        
 
 RingHom   RingHom
 
 
        |
| 20 | 16, 19 | syl6bb 276 |
. . . 4
     Sect    
 
 RingHom   RingHom
 
 
         |
| 21 | 14, 20 | anbi12d 747 |
. . 3
      Sect        Sect          RingHom 

RingHom    
         RingHom 

RingHom    
          |
| 22 | | anandi 871 |
. . 3
     RingHom

 RingHom   
          RingHom

 RingHom   
             RingHom   RingHom
 
 
        RingHom

 RingHom        RingHom   RingHom
 
 
       
         |
| 23 | 21, 22 | syl6bb 276 |
. 2
      Sect        Sect           RingHom   RingHom
 
 
        RingHom

 RingHom        RingHom   RingHom
 
 
       
          |
| 24 | | simplrl 800 |
. . . . . 6
      RingHom 

RingHom    
        RingHom

 RingHom        RingHom   RingHom
 
 
       
      

RingHom    |
| 25 | 24 | adantl 482 |
. . . . 5
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        

RingHom    |
| 26 | 11, 15 | rhmf 18726 |
. . . . . . . . . 10
  RingHom 
              |
| 27 | 15, 11 | rhmf 18726 |
. . . . . . . . . 10
  RingHom 
              |
| 28 | 26, 27 | anim12i 590 |
. . . . . . . . 9
   RingHom   RingHom
 
            
               |
| 29 | 28 | ad2antlr 763 |
. . . . . . . 8
      RingHom 

RingHom    
        RingHom

 RingHom        RingHom   RingHom
 
 
       
      
            
               |
| 30 | | simpr 477 |
. . . . . . . . 9
     RingHom

 RingHom   
       
                |
| 31 | 30 | adantl 482 |
. . . . . . . 8
      RingHom 

RingHom    
        RingHom

 RingHom        RingHom   RingHom
 
 
       
      
 
       |
| 32 | | simpr 477 |
. . . . . . . . 9
    RingHom   RingHom
 
 
       
       |
| 33 | 32 | ad2antrl 764 |
. . . . . . . 8
      RingHom 

RingHom    
        RingHom

 RingHom        RingHom   RingHom
 
 
       
      
 
       |
| 34 | 29, 31, 33 | jca32 558 |
. . . . . . 7
      RingHom 

RingHom    
        RingHom

 RingHom        RingHom   RingHom
 
 
       
      
             
            
 

      
         |
| 35 | 34 | adantl 482 |
. . . . . 6
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        
             
            
 

      
         |
| 36 | | fcof1o 6551 |
. . . . . . 7
                              
     
                     
   |
| 37 | | eqcom 2629 |
. . . . . . . 8
 
   |
| 38 | 37 | anbi2i 730 |
. . . . . . 7
             
 
            
    |
| 39 | 36, 38 | sylib 208 |
. . . . . 6
                              
     
                    
    |
| 40 | 35, 39 | syl 17 |
. . . . 5
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        
            
    |
| 41 | | anass 681 |
. . . . 5
    RingHom              
 
  RingHom
             
     |
| 42 | 25, 40, 41 | sylanbrc 698 |
. . . 4
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        
 
 RingHom                   |
| 43 | 11, 15 | isrim 18733 |
. . . . . . 7
 
   RingIso 
  RingHom
                 |
| 44 | 7, 8, 43 | syl2anc 693 |
. . . . . 6
   RingIso 
  RingHom
                 |
| 45 | 44 | anbi1d 741 |
. . . . 5
    RingIso

 
 
 RingHom                    |
| 46 | 45 | adantr 481 |
. . . 4
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        
 
 RingIso   
 
 RingHom                    |
| 47 | 42, 46 | mpbird 247 |
. . 3
 
     RingHom

 RingHom   
       
 RingHom   RingHom
       RingHom

 RingHom   
       
        
  RingIso

    |
| 48 | 11, 15 | rimrhm 18735 |
. . . . . 6
  RingIso 

RingHom    |
| 49 | 48 | ad2antrl 764 |
. . . . 5
 
  RingIso

  
 RingHom    |
| 50 | | isrim0 18723 |
. . . . . . . . . . 11
 
   RingIso 
  RingHom
 
 RingHom      |
| 51 | 7, 8, 50 | syl2anc 693 |
. . . . . . . . . 10
   RingIso 
  RingHom
 
 RingHom      |
| 52 | | eleq1 2689 |
. . . . . . . . . . . 12
     RingHom
  RingHom     |
| 53 | 52 | eqcoms 2630 |
. . . . . . . . . . 11
     RingHom
  RingHom     |
| 54 | 53 | anbi2d 740 |
. . . . . . . . . 10
     RingHom
 
 RingHom  
  RingHom

 RingHom      |
| 55 | 51, 54 | sylan9bbr 737 |
. . . . . . . . 9
    
 RingIso    RingHom

 RingHom      |
| 56 | | simpr 477 |
. . . . . . . . 9
   RingHom   RingHom
 

RingHom    |
| 57 | 55, 56 | syl6bi 243 |
. . . . . . . 8
    
 RingIso 

RingHom     |
| 58 | 57 | com12 32 |
. . . . . . 7
  RingIso 
 
   RingHom
    |
| 59 | 58 | expdimp 453 |
. . . . . 6
   RingIso      RingHom     |
| 60 | 59 | impcom 446 |
. . . . 5
 
  RingIso

  
 RingHom    |
| 61 | | coeq1 5279 |
. . . . . . 7
         |
| 62 | 61 | ad2antll 765 |
. . . . . 6
 
  RingIso

          |
| 63 | 11, 15 | rimf1o 18734 |
. . . . . . . 8
  RingIso 
              |
| 64 | 63 | ad2antrl 764 |
. . . . . . 7
 
  RingIso

                 |
| 65 | | f1ococnv1 6165 |
. . . . . . 7
               
       |
| 66 | 64, 65 | syl 17 |
. . . . . 6
 
  RingIso

     
       |
| 67 | 62, 66 | eqtrd 2656 |
. . . . 5
 
  RingIso

            |
| 68 | 49, 60, 67 | jca31 557 |
. . . 4
 
  RingIso

      RingHom

 RingHom   
         |
| 69 | 51 | biimpcd 239 |
. . . . . . 7
  RingIso 
   RingHom  
 RingHom      |
| 70 | 69 | adantr 481 |
. . . . . 6
   RingIso       RingHom
 
 RingHom      |
| 71 | 70 | impcom 446 |
. . . . 5
 
  RingIso

     RingHom  
 RingHom     |
| 72 | | eleq1 2689 |
. . . . . . 7
    RingHom 
  RingHom
    |
| 73 | 72 | ad2antll 765 |
. . . . . 6
 
  RingIso

     RingHom 
  RingHom
    |
| 74 | 73 | anbi2d 740 |
. . . . 5
 
  RingIso

      RingHom

 RingHom  
  RingHom
 
 RingHom      |
| 75 | 71, 74 | mpbird 247 |
. . . 4
 
  RingIso

     RingHom   RingHom
    |
| 76 | | coeq2 5280 |
. . . . . . 7
         |
| 77 | 76 | ad2antll 765 |
. . . . . 6
 
  RingIso

          |
| 78 | | f1ococnv2 6163 |
. . . . . . 7
               
       |
| 79 | 64, 78 | syl 17 |
. . . . . 6
 
  RingIso

     
       |
| 80 | 77, 79 | eqtrd 2656 |
. . . . 5
 
  RingIso

            |
| 81 | 75, 67, 80 | jca31 557 |
. . . 4
 
  RingIso

       RingHom 

RingHom    
       
        |
| 82 | 68, 75, 81 | jca31 557 |
. . 3
 
  RingIso

        RingHom   RingHom
 
 
        RingHom

 RingHom        RingHom   RingHom
 
 
       
         |
| 83 | 47, 82 | impbida 877 |
. 2
       RingHom   RingHom
 
 
        RingHom

 RingHom        RingHom   RingHom
 
 
       
         RingIso

     |
| 84 | 10, 23, 83 | 3bitrd 294 |
1
          RingIso       |