| Step | Hyp | Ref
| Expression |
| 1 | | anandir 555 |
. . . . . . . 8
   
  
     
      |
| 2 | 1 | exbii 1536 |
. . . . . . 7
    
           
      |
| 3 | | 19.40 1562 |
. . . . . . 7
        
             
      |
| 4 | 2, 3 | sylbi 119 |
. . . . . 6
    
                    |
| 5 | | nfv 1461 |
. . . . . . . . . . 11
    |
| 6 | | nfe1 1425 |
. . . . . . . . . . 11
         |
| 7 | 5, 6 | nfan 1497 |
. . . . . . . . . 10
  
     
   |
| 8 | | funmo 4937 |
. . . . . . . . . . . . . 14
 
      |
| 9 | | vex 2604 |
. . . . . . . . . . . . . . . 16
 |
| 10 | | vex 2604 |
. . . . . . . . . . . . . . . 16
 |
| 11 | 9, 10 | brcnv 4536 |
. . . . . . . . . . . . . . 15
   
    |
| 12 | 11 | mobii 1978 |
. . . . . . . . . . . . . 14
          |
| 13 | 8, 12 | sylib 120 |
. . . . . . . . . . . . 13
 
     |
| 14 | | mopick 2019 |
. . . . . . . . . . . . 13
              
   |
| 15 | 13, 14 | sylan 277 |
. . . . . . . . . . . 12
            
   |
| 16 | 15 | con2d 586 |
. . . . . . . . . . 11
                |
| 17 | | imnan 656 |
. . . . . . . . . . 11
           |
| 18 | 16, 17 | sylib 120 |
. . . . . . . . . 10
                |
| 19 | 7, 18 | alrimi 1455 |
. . . . . . . . 9
          
      |
| 20 | 19 | ex 113 |
. . . . . . . 8
 
               |
| 21 | | exancom 1539 |
. . . . . . . 8
      
        |
| 22 | | alnex 1428 |
. . . . . . . 8
     
        |
| 23 | 20, 21, 22 | 3imtr3g 202 |
. . . . . . 7
 
   
            |
| 24 | 23 | anim2d 330 |
. . . . . 6
 
          
                     |
| 25 | 4, 24 | syl5 32 |
. . . . 5
 
    
                     |
| 26 | | df-rex 2354 |
. . . . . 6
      
          |
| 27 | | eldif 2982 |
. . . . . . . 8
  

   |
| 28 | 27 | anbi1i 445 |
. . . . . . 7
      
 

     |
| 29 | 28 | exbii 1536 |
. . . . . 6
     
  
          |
| 30 | 26, 29 | bitri 182 |
. . . . 5
      
          |
| 31 | | df-rex 2354 |
. . . . . 6
   
        |
| 32 | | df-rex 2354 |
. . . . . . 7
   
        |
| 33 | 32 | notbii 626 |
. . . . . 6
   
        |
| 34 | 31, 33 | anbi12i 447 |
. . . . 5
        
                |
| 35 | 25, 30, 34 | 3imtr4g 203 |
. . . 4
 
        
         |
| 36 | 35 | ss2abdv 3067 |
. . 3
 
       
  
 

      |
| 37 | | dfima2 4690 |
. . 3
       
       |
| 38 | | dfima2 4690 |
. . . . 5
     
    |
| 39 | | dfima2 4690 |
. . . . 5
     
    |
| 40 | 38, 39 | difeq12i 3088 |
. . . 4
                 
     |
| 41 | | difab 3233 |
. . . 4
  
    
               |
| 42 | 40, 41 | eqtri 2101 |
. . 3
                     |
| 43 | 36, 37, 42 | 3sstr4g 3040 |
. 2
 
                  |
| 44 | | imadiflem 4998 |
. . 3
                 |
| 45 | 44 | a1i 9 |
. 2
 
                  |
| 46 | 43, 45 | eqssd 3016 |
1
 
                  |