| Step | Hyp | Ref
| Expression |
| 1 | | bren 6806 |
. . . . . . 7

       |
| 2 | 1 | biimpi 120 |
. . . . . 6
        |
| 3 | 2 | ad2antrr 488 |
. . . . 5
  
Omni
   
      |
| 4 | | fveq1 5557 |
. . . . . . . . . 10
               |
| 5 | 4 | eqeq1d 2205 |
. . . . . . . . 9
       
         |
| 6 | 5 | rexbidv 2498 |
. . . . . . . 8
    
   

         |
| 7 | 4 | eqeq1d 2205 |
. . . . . . . . 9
       
         |
| 8 | 7 | ralbidv 2497 |
. . . . . . . 8
    
   

         |
| 9 | 6, 8 | orbi12d 794 |
. . . . . . 7
                                   |
| 10 | | isomnimap 7203 |
. . . . . . . . 9
 Omni  Omni           
        |
| 11 | 10 | ibi 176 |
. . . . . . . 8
 Omni                   |
| 12 | 11 | ad3antlr 493 |
. . . . . . 7
    Omni
       
     
            |
| 13 | | simpr 110 |
. . . . . . . . . . 11
  
Omni
       |
| 14 | | 2onn 6579 |
. . . . . . . . . . . . 13
 |
| 15 | | relen 6803 |
. . . . . . . . . . . . . 14
 |
| 16 | 15 | brrelex2i 4707 |
. . . . . . . . . . . . 13
   |
| 17 | | elmapg 6720 |
. . . . . . . . . . . . 13
 
           |
| 18 | 14, 16, 17 | sylancr 414 |
. . . . . . . . . . . 12
   
       |
| 19 | 18 | ad2antrr 488 |
. . . . . . . . . . 11
  
Omni
             |
| 20 | 13, 19 | mpbid 147 |
. . . . . . . . . 10
  
Omni
         |
| 21 | 20 | adantr 276 |
. . . . . . . . 9
    Omni
       
      |
| 22 | | f1of 5504 |
. . . . . . . . . 10
    
      |
| 23 | 22 | adantl 277 |
. . . . . . . . 9
    Omni
       
      |
| 24 | | fco 5423 |
. . . . . . . . 9
                   |
| 25 | 21, 23, 24 | syl2anc 411 |
. . . . . . . 8
    Omni
       
        |
| 26 | | simpllr 534 |
. . . . . . . . 9
    Omni
       
Omni |
| 27 | | elmapg 6720 |
. . . . . . . . 9
 
Omni     
         |
| 28 | 14, 26, 27 | sylancr 414 |
. . . . . . . 8
    Omni
       
    
         |
| 29 | 25, 28 | mpbird 167 |
. . . . . . 7
    Omni
       
      |
| 30 | 9, 12, 29 | rspcdva 2873 |
. . . . . 6
    Omni
       
 
      
         |
| 31 | | f1ofn 5505 |
. . . . . . . . . . . 12
    
  |
| 32 | 31 | ad2antlr 489 |
. . . . . . . . . . 11
     Omni            |
| 33 | | fvco2 5630 |
. . . . . . . . . . 11
 
                 |
| 34 | 32, 33 | sylancom 420 |
. . . . . . . . . 10
     Omni                          |
| 35 | 34 | eqeq1d 2205 |
. . . . . . . . 9
     Omni                
           |
| 36 | 23 | ffvelcdmda 5697 |
. . . . . . . . . 10
     Omni                |
| 37 | | simpr 110 |
. . . . . . . . . . . 12
     
Omni                     |
| 38 | 37 | fveq2d 5562 |
. . . . . . . . . . 11
     
Omni                             |
| 39 | 38 | eqeq1d 2205 |
. . . . . . . . . 10
     
Omni                               |
| 40 | 36, 39 | rspcedv 2872 |
. . . . . . . . 9
     Omni                   
       |
| 41 | 35, 40 | sylbid 150 |
. . . . . . . 8
     Omni                 
       |
| 42 | 41 | rexlimdva 2614 |
. . . . . . 7
    Omni
       
 
     

       |
| 43 | 31 | ad3antlr 493 |
. . . . . . . . . . 11
     
Omni         
          |
| 44 | | f1ocnv 5517 |
. . . . . . . . . . . . . 14
    
       |
| 45 | | f1of 5504 |
. . . . . . . . . . . . . 14
             |
| 46 | 44, 45 | syl 14 |
. . . . . . . . . . . . 13
    
       |
| 47 | 46 | ad3antlr 493 |
. . . . . . . . . . . 12
     
Omni         
               |
| 48 | | simpr 110 |
. . . . . . . . . . . 12
     
Omni         
          |
| 49 | 47, 48 | ffvelcdmd 5698 |
. . . . . . . . . . 11
     
Omni         
               |
| 50 | | fvco2 5630 |
. . . . . . . . . . 11
                                  |
| 51 | 43, 49, 50 | syl2anc 411 |
. . . . . . . . . 10
     
Omni         
                                  |
| 52 | | fveq2 5558 |
. . . . . . . . . . . 12
                         |
| 53 | 52 | eqeq1d 2205 |
. . . . . . . . . . 11
            
              |
| 54 | | simplr 528 |
. . . . . . . . . . 11
     
Omni         
        
        |
| 55 | 53, 54, 49 | rspcdva 2873 |
. . . . . . . . . 10
     
Omni         
                     |
| 56 | | simpllr 534 |
. . . . . . . . . . 11
     
Omni         
              |
| 57 | | f1ocnvfv2 5825 |
. . . . . . . . . . . 12
     
            |
| 58 | 57 | fveq2d 5562 |
. . . . . . . . . . 11
     
                    |
| 59 | 56, 58 | sylancom 420 |
. . . . . . . . . 10
     
Omni         
                           |
| 60 | 51, 55, 59 | 3eqtr3rd 2238 |
. . . . . . . . 9
     
Omni         
              |
| 61 | 60 | ralrimiva 2570 |
. . . . . . . 8
     Omni         
       
      |
| 62 | 61 | ex 115 |
. . . . . . 7
    Omni
       
 
     

       |
| 63 | 42, 62 | orim12d 787 |
. . . . . 6
    Omni
       
  
      
        
    
        |
| 64 | 30, 63 | mpd 13 |
. . . . 5
    Omni
       
 
    
       |
| 65 | 3, 64 | exlimddv 1913 |
. . . 4
  
Omni
                 |
| 66 | 65 | ralrimiva 2570 |
. . 3
 
Omni           
       |
| 67 | | isomnimap 7203 |
. . . . 5
 
Omni                    |
| 68 | 16, 67 | syl 14 |
. . . 4
 
Omni                    |
| 69 | 68 | adantr 276 |
. . 3
 
Omni  Omni
     
             |
| 70 | 66, 69 | mpbird 167 |
. 2
 
Omni Omni |
| 71 | 70 | ex 115 |
1
 
Omni Omni  |