Proof of Theorem imadif
| Step | Hyp | Ref
| Expression |
| 1 | | ax-17 971 |
. . . . . . . . . . 11
   
   |
| 2 | | hbe1 1016 |
. . . . . . . . . . 11
     
           |
| 3 | 1, 2 | hban 1009 |
. . . . . . . . . 10
       
    
     
    |
| 4 | | mopick 1433 |
. . . . . . . . . . . . 13
                  |
| 5 | | funmo 3532 |
. . . . . . . . . . . . . 14
        |
| 6 | | visset 1813 |
. . . . . . . . . . . . . . . 16
 |
| 7 | | visset 1813 |
. . . . . . . . . . . . . . . 16
 |
| 8 | 6, 7 | brcnv 3299 |
. . . . . . . . . . . . . . 15
        |
| 9 | 8 | mobii 1405 |
. . . . . . . . . . . . . 14
          |
| 10 | 5, 9 | sylib 198 |
. . . . . . . . . . . . 13
       |
| 11 | 4, 10 | sylan 448 |
. . . . . . . . . . . 12
       
    
   |
| 12 | 11 | con2d 91 |
. . . . . . . . . . 11
       
        |
| 13 | | imnan 242 |
. . . . . . . . . . 11
           |
| 14 | 12, 13 | sylib 198 |
. . . . . . . . . 10
       
        |
| 15 | 3, 14 | 19.21ai 998 |
. . . . . . . . 9
       
         |
| 16 | 15 | ex 373 |
. . . . . . . 8
       
         |
| 17 | | exancom 1054 |
. . . . . . . 8
     
         |
| 18 | | alnex 1033 |
. . . . . . . 8
              |
| 19 | 16, 17, 18 | 3imtr3g 552 |
. . . . . . 7
                  |
| 20 | 19 | anim2d 561 |
. . . . . 6
                                  |
| 21 | | anandir 511 |
. . . . . . . 8
                   |
| 22 | 21 | exbii 1051 |
. . . . . . 7
    

          
      |
| 23 | | 19.40 1094 |
. . . . . . 7
        
             
      |
| 24 | 22, 23 | sylbi 199 |
. . . . . 6
    

                   |
| 25 | 20, 24 | syl5 21 |
. . . . 5
      

                    |
| 26 | | 19.29r 1072 |
. . . . . . 7
                            |
| 27 | 26, 18 | sylan2br 453 |
. . . . . 6
                             |
| 28 | | andi 604 |
. . . . . . . 8
      
         
            |
| 29 | | ianor 305 |
. . . . . . . . 9
           |
| 30 | 29 | anbi2i 480 |
. . . . . . . 8
                
      |
| 31 | | an23 485 |
. . . . . . . . 9
               |
| 32 | | pm3.24 658 |
. . . . . . . . . . . 12
       |
| 33 | 32 | intnan 691 |
. . . . . . . . . . 11
         |
| 34 | | anass 439 |
. . . . . . . . . . 11
                   |
| 35 | 33, 34 | mtbir 192 |
. . . . . . . . . 10
         |
| 36 | 35 | biorfi 736 |
. . . . . . . . 9
     
                   |
| 37 | 31, 36 | bitr 173 |
. . . . . . . 8
            
            |
| 38 | 28, 30, 37 | 3bitr4 183 |
. . . . . . 7
            

     |
| 39 | 38 | exbii 1051 |
. . . . . 6
                

     |
| 40 | 27, 39 | sylib 198 |
. . . . 5
                  
      |
| 41 | 25, 40 | impbid1 517 |
. . . 4
      

                    |
| 42 | | eldif 2057 |
. . . . . 6

  
   |
| 43 | 42 | anbi1i 481 |
. . . . 5
        
      |
| 44 | 43 | exbii 1051 |
. . . 4
            
      |
| 45 | 6 | elima2 3409 |
. . . . 5
             |
| 46 | 6 | elima2 3409 |
. . . . . 6
             |
| 47 | 46 | negbii 187 |
. . . . 5
             |
| 48 | 45, 47 | anbi12i 482 |
. . . 4
                           |
| 49 | 41, 44, 48 | 3bitr4g 555 |
. . 3
                        |
| 50 | 6 | elima2 3409 |
. . 3
           
     |
| 51 | | eldif 2057 |
. . 3
                       |
| 52 | 49, 50, 51 | 3bitr4g 555 |
. 2
                      |
| 53 | 52 | eqrdv 1473 |
1
                    |