| Step | Hyp | Ref
| Expression |
| 1 | | zrinitorngc.c |
. . . . . . . . . 10
RngCat   |
| 2 | | eqid 2622 |
. . . . . . . . . 10
         |
| 3 | | zrinitorngc.u |
. . . . . . . . . 10
   |
| 4 | 1, 2, 3 | rngcbas 41965 |
. . . . . . . . 9
      Rng  |
| 5 | 4 | eleq2d 2687 |
. . . . . . . 8
       Rng   |
| 6 | | elin 3796 |
. . . . . . . . 9
  Rng 
Rng  |
| 7 | 6 | simprbi 480 |
. . . . . . . 8
  Rng Rng |
| 8 | 5, 7 | syl6bi 243 |
. . . . . . 7
      Rng  |
| 9 | 8 | imp 445 |
. . . . . 6
 
    
Rng |
| 10 | | zrinitorngc.z |
. . . . . . 7
  NzRing  |
| 11 | 10 | adantr 481 |
. . . . . 6
 
    

NzRing  |
| 12 | | eqid 2622 |
. . . . . . 7
         |
| 13 | | eqid 2622 |
. . . . . . 7
         |
| 14 | | eqid 2622 |
. . . . . . 7
                     |
| 15 | 12, 13, 14 | zrrnghm 41917 |
. . . . . 6
  Rng 
NzRing            RngHomo
   |
| 16 | 9, 11, 15 | syl2anc 693 |
. . . . 5
 
    
           RngHomo
   |
| 17 | | simpr 477 |
. . . . . 6
                   RngHomo              RngHomo    |
| 18 | 3 | adantr 481 |
. . . . . . . . . 10
 
    
  |
| 19 | | eqid 2622 |
. . . . . . . . . 10
       |
| 20 | | zrinitorngc.e |
. . . . . . . . . . . . 13
   |
| 21 | | eldifi 3732 |
. . . . . . . . . . . . . 14
  NzRing
  |
| 22 | | ringrng 41879 |
. . . . . . . . . . . . . 14

Rng |
| 23 | 10, 21, 22 | 3syl 18 |
. . . . . . . . . . . . 13
 Rng |
| 24 | 20, 23 | elind 3798 |
. . . . . . . . . . . 12
  Rng  |
| 25 | 24, 4 | eleqtrrd 2704 |
. . . . . . . . . . 11
       |
| 26 | 25 | adantr 481 |
. . . . . . . . . 10
 
    
      |
| 27 | | simpr 477 |
. . . . . . . . . 10
 
    
      |
| 28 | 1, 2, 18, 19, 26, 27 | rngchom 41967 |
. . . . . . . . 9
 
    
  
     RngHomo    |
| 29 | 28 | eqcomd 2628 |
. . . . . . . 8
 
    
 RngHomo           |
| 30 | 29 | eleq2d 2687 |
. . . . . . 7
 
    
            RngHomo                      |
| 31 | 30 | biimpa 501 |
. . . . . 6
                   RngHomo                      |
| 32 | 28 | eleq2d 2687 |
. . . . . . . . . . . 12
 
    
         RngHomo     |
| 33 | | eqid 2622 |
. . . . . . . . . . . . 13
         |
| 34 | 12, 33 | rnghmf 41899 |
. . . . . . . . . . . 12
  RngHomo 
              |
| 35 | 32, 34 | syl6bi 243 |
. . . . . . . . . . 11
 
    
                       |
| 36 | 35 | imp 445 |
. . . . . . . . . 10
               
              |
| 37 | | ffn 6045 |
. . . . . . . . . . . 12
            
      |
| 38 | 37 | adantl 482 |
. . . . . . . . . . 11
   
    
  
                        |
| 39 | | fvex 6201 |
. . . . . . . . . . . . 13
     |
| 40 | 39, 14 | fnmpti 6022 |
. . . . . . . . . . . 12
               |
| 41 | 40 | a1i 11 |
. . . . . . . . . . 11
   
    
  
                                  |
| 42 | 32 | biimpa 501 |
. . . . . . . . . . . . . 14
               

RngHomo    |
| 43 | | rnghmghm 41898 |
. . . . . . . . . . . . . 14
  RngHomo 

   |
| 44 | | eqid 2622 |
. . . . . . . . . . . . . . 15
         |
| 45 | 44, 13 | ghmid 17666 |
. . . . . . . . . . . . . 14
  
              |
| 46 | 42, 43, 45 | 3syl 18 |
. . . . . . . . . . . . 13
               
              |
| 47 | 46 | ad2antrr 762 |
. . . . . . . . . . . 12
         
  
                                     |
| 48 | 12, 44 | 0ringbas 41871 |
. . . . . . . . . . . . . . . . . 18
  NzRing             |
| 49 | 10, 48 | syl 17 |
. . . . . . . . . . . . . . . . 17
             |
| 50 | 49 | eleq2d 2687 |
. . . . . . . . . . . . . . . 16
               |
| 51 | | elsni 4194 |
. . . . . . . . . . . . . . . . 17
             |
| 52 | 51 | fveq2d 6195 |
. . . . . . . . . . . . . . . 16
                     |
| 53 | 50, 52 | syl6bi 243 |
. . . . . . . . . . . . . . 15
                     |
| 54 | 53 | adantr 481 |
. . . . . . . . . . . . . 14
 
    
    
               |
| 55 | 54 | ad2antrr 762 |
. . . . . . . . . . . . 13
   
    
  
                                      |
| 56 | 55 | imp 445 |
. . . . . . . . . . . 12
         
  
                                     |
| 57 | | eqidd 2623 |
. . . . . . . . . . . . . 14
    
                      |
| 58 | | eqidd 2623 |
. . . . . . . . . . . . . 14
                 |
| 59 | | id 22 |
. . . . . . . . . . . . . 14
    
      |
| 60 | 39 | a1i 11 |
. . . . . . . . . . . . . 14
    
      |
| 61 | 57, 58, 59, 60 | fvmptd 6288 |
. . . . . . . . . . . . 13
    
                    |
| 62 | 61 | adantl 482 |
. . . . . . . . . . . 12
         
  
                                           |
| 63 | 47, 56, 62 | 3eqtr4d 2666 |
. . . . . . . . . . 11
         
  
                                           |
| 64 | 38, 41, 63 | eqfnfvd 6314 |
. . . . . . . . . 10
   
    
  
                              |
| 65 | 36, 64 | mpdan 702 |
. . . . . . . . 9
               

           |
| 66 | 65 | ex 450 |
. . . . . . . 8
 
    
                     |
| 67 | 66 | adantr 481 |
. . . . . . 7
                   RngHomo          
             |
| 68 | 67 | alrimiv 1855 |
. . . . . 6
                   RngHomo            
             |
| 69 | 17, 31, 68 | 3jca 1242 |
. . . . 5
                   RngHomo               RngHomo  
                                        |
| 70 | 16, 69 | mpdan 702 |
. . . 4
 
    
            RngHomo 
                          
              |
| 71 | | eleq1 2689 |
. . . . 5
                  
                    |
| 72 | 71 | eqeu 3377 |
. . . 4
             RngHomo  
                                      
         |
| 73 | 70, 72 | syl 17 |
. . 3
 
    

  
      |
| 74 | 73 | ralrimiva 2966 |
. 2
       
         |
| 75 | 1 | rngccat 41978 |
. . . 4
   |
| 76 | 3, 75 | syl 17 |
. . 3
   |
| 77 | 2, 19, 76, 25 | isinito 16650 |
. 2
  InitO 
                 |
| 78 | 74, 77 | mpbird 247 |
1
 InitO    |