Proof of Theorem ovi3
| Step | Hyp | Ref
| Expression |
| 1 | | ovi3.1 |
. . . 4
  


 
    |
| 2 | | elex 2774 |
. . . 4
     |
| 3 | 1, 2 | syl 14 |
. . 3
  


 
  |
| 4 | | isset 2769 |
. . 3

   |
| 5 | 3, 4 | sylib 122 |
. 2
  


  
  |
| 6 | | nfv 1542 |
. . 3
     
   |
| 7 | | nfcv 2339 |
. . . . 5
      |
| 8 | | ovi3.3 |
. . . . . 6
     
    

                  
    |
| 9 | | nfoprab3 5977 |
. . . . . 6
       
    

                  
    |
| 10 | 8, 9 | nfcxfr 2336 |
. . . . 5
   |
| 11 | | nfcv 2339 |
. . . . 5
      |
| 12 | 7, 10, 11 | nfov 5955 |
. . . 4
             |
| 13 | 12 | nfeq1 2349 |
. . 3
             |
| 14 | | ovi3.2 |
. . . . . . 7
      
  |
| 15 | 14 | eqeq2d 2208 |
. . . . . 6
           |
| 16 | 15 | copsex4g 4281 |
. . . . 5
  


                         
    |
| 17 | | opelxpi 4696 |
. . . . . 6
 
        |
| 18 | | opelxpi 4696 |
. . . . . 6
 
        |
| 19 | | nfcv 2339 |
. . . . . . 7
      |
| 20 | | nfcv 2339 |
. . . . . . 7
      |
| 21 | | nfcv 2339 |
. . . . . . 7
      |
| 22 | | nfv 1542 |
. . . . . . . 8
                     
  |
| 23 | | nfoprab1 5975 |
. . . . . . . . . . 11
       
    

                  
    |
| 24 | 8, 23 | nfcxfr 2336 |
. . . . . . . . . 10
   |
| 25 | | nfcv 2339 |
. . . . . . . . . 10
   |
| 26 | 19, 24, 25 | nfov 5955 |
. . . . . . . . 9
          |
| 27 | 26 | nfeq1 2349 |
. . . . . . . 8
          |
| 28 | 22, 27 | nfim 1586 |
. . . . . . 7
                      
          |
| 29 | | nfv 1542 |
. . . . . . . 8
                        
  |
| 30 | | nfoprab2 5976 |
. . . . . . . . . . 11
       
    

                  
    |
| 31 | 8, 30 | nfcxfr 2336 |
. . . . . . . . . 10
   |
| 32 | 20, 31, 21 | nfov 5955 |
. . . . . . . . 9
             |
| 33 | 32 | nfeq1 2349 |
. . . . . . . 8
             |
| 34 | 29, 33 | nfim 1586 |
. . . . . . 7
                         

            |
| 35 | | eqeq1 2203 |
. . . . . . . . . . 11
         
       |
| 36 | 35 | anbi1d 465 |
. . . . . . . . . 10
                   
       |
| 37 | 36 | anbi1d 465 |
. . . . . . . . 9
             

       
   
    |
| 38 | 37 | 4exbidv 1884 |
. . . . . . . 8
                     
                    
    |
| 39 | | oveq1 5932 |
. . . . . . . . 9
                 |
| 40 | 39 | eqeq1d 2205 |
. . . . . . . 8
                   |
| 41 | 38, 40 | imbi12d 234 |
. . . . . . 7
                      
     
            
   
   

           |
| 42 | | eqeq1 2203 |
. . . . . . . . . . 11
         
       |
| 43 | 42 | anbi2d 464 |
. . . . . . . . . 10
       
   
                     |
| 44 | 43 | anbi1d 465 |
. . . . . . . . 9
            
   
    
          
    |
| 45 | 44 | 4exbidv 1884 |
. . . . . . . 8
                
   
   
                       
    |
| 46 | | oveq2 5933 |
. . . . . . . . 9
                       |
| 47 | 46 | eqeq1d 2205 |
. . . . . . . 8
       
                 |
| 48 | 45, 47 | imbi12d 234 |
. . . . . . 7
                         

                               

              |
| 49 | | moeq 2939 |
. . . . . . . . . . . 12
  |
| 50 | 49 | mosubop 4730 |
. . . . . . . . . . 11
            |
| 51 | 50 | mosubop 4730 |
. . . . . . . . . 10
                     |
| 52 | | anass 401 |
. . . . . . . . . . . . . 14
         

       
    |
| 53 | 52 | 2exbii 1620 |
. . . . . . . . . . . . 13
             

                |
| 54 | | 19.42vv 1926 |
. . . . . . . . . . . . 13
              
           
    |
| 55 | 53, 54 | bitri 184 |
. . . . . . . . . . . 12
             

           
    |
| 56 | 55 | 2exbii 1620 |
. . . . . . . . . . 11
                 

                    |
| 57 | 56 | mobii 2082 |
. . . . . . . . . 10
               
   
                       |
| 58 | 51, 57 | mpbir 146 |
. . . . . . . . 9
                  
  |
| 59 | 58 | a1i 9 |
. . . . . . . 8
   
                 
   
   |
| 60 | 59, 8 | ovidi 6045 |
. . . . . . 7
   
                
   

       |
| 61 | 19, 20, 21, 28, 34, 41, 48, 60 | vtocl2gaf 2831 |
. . . . . 6
      
                  
          
              |
| 62 | 17, 18, 61 | syl2an 289 |
. . . . 5
  


                         

             |
| 63 | 16, 62 | sylbird 170 |
. . . 4
  


                |
| 64 | | eqeq2 2206 |
. . . 4
           
             |
| 65 | 63, 64 | mpbidi 151 |
. . 3
  


                |
| 66 | 6, 13, 65 | exlimd 1611 |
. 2
  


                 |
| 67 | 5, 66 | mpd 13 |
1
  


              |