| Step | Hyp | Ref
 | Expression | 
| 1 |   | ncfinraise 4482 | 
. . . . . . . . 9
        Nn            
            Nn   1    
     1         | 
| 2 |   | anidm 625 | 
. . . . . . . . . 10
     1  
       1  
        1  
     | 
| 3 | 2 | rexbii 2640 | 
. . . . . . . . 9
       
Nn   1  
       1  
            Nn  1  
     | 
| 4 | 1, 3 | sylib 188 | 
. . . . . . . 8
        Nn            
            Nn  1        | 
| 5 | 4 | 3anidm23 1241 | 
. . . . . . 7
        Nn                 Nn  1        | 
| 6 | 5 | ex 423 | 
. . . . . 6
       Nn                 Nn  1  
      | 
| 7 | 6 | ancld 536 | 
. . . . 5
       Nn                          Nn  1  
       | 
| 8 | 7 | eximdv 1622 | 
. . . 4
       Nn                               Nn  1  
       | 
| 9 | 8 | imp 418 | 
. . 3
        Nn                               Nn  1         | 
| 10 |   | n0 3560 | 
. . . 4
        
 
      
   | 
| 11 | 10 | anbi2i 675 | 
. . 3
        Nn              
  Nn              | 
| 12 |   | rexcom 2773 | 
. . . 4
       
Nn   
     1                     Nn  1        | 
| 13 |   | df-rex 2621 | 
. . . 4
       
       Nn  1             
           Nn  1  
      | 
| 14 | 12, 13 | bitri 240 | 
. . 3
       
Nn   
     1             
           Nn  1  
      | 
| 15 | 9, 11, 14 | 3imtr4i 257 | 
. 2
        Nn                 Nn         1        | 
| 16 |   | pw1eq 4144 | 
. . . . . . . 8
            1      1    | 
| 17 | 16 | eleq1d 2419 | 
. . . . . . 7
             1          1         | 
| 18 | 17 | cbvrexv 2837 | 
. . . . . 6
       
   1                 1  
     | 
| 19 | 18 | anbi2i 675 | 
. . . . 5
      
     1                 1               
   1             
   1         | 
| 20 |   | reeanv 2779 | 
. . . . 5
       
           1          1               
   1             
   1         | 
| 21 | 19, 20 | bitr4i 243 | 
. . . 4
      
     1                 1                          1          1         | 
| 22 |   | simplll 734 | 
. . . . . . . 8
          Nn                
Nn    
  Nn         
       
         1          1                Nn   | 
| 23 |   | simprll 738 | 
. . . . . . . 8
          Nn                
Nn    
  Nn         
       
         1          1                   | 
| 24 |   | simprlr 739 | 
. . . . . . . 8
          Nn                
Nn    
  Nn         
       
         1          1                   | 
| 25 |   | ncfinraise 4482 | 
. . . . . . . 8
        Nn            
            Nn   1    
     1         | 
| 26 | 22, 23, 24, 25 | syl3anc 1182 | 
. . . . . . 7
          Nn                
Nn    
  Nn         
       
         1          1                 Nn   1  
       1  
      | 
| 27 |   | simp1rl 1020 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                Nn   | 
| 28 |   | simp3l 983 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                Nn   | 
| 29 |   | simp2rl 1024 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1             1  
     | 
| 30 |   | simp3rl 1028 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1             1  
     | 
| 31 |   | nnceleq 4431 | 
. . . . . . . . . . . 12
         Nn       Nn       1    
     1                  | 
| 32 | 27, 28, 29, 30, 31 | syl22anc 1183 | 
. . . . . . . . . . 11
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                   | 
| 33 |   | simp1rr 1021 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                Nn   | 
| 34 |   | simp2rr 1025 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1             1  
     | 
| 35 |   | simp3rr 1029 | 
. . . . . . . . . . . 12
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1             1  
     | 
| 36 |   | nnceleq 4431 | 
. . . . . . . . . . . 12
         Nn       Nn       1    
     1                  | 
| 37 | 33, 28, 34, 35, 36 | syl22anc 1183 | 
. . . . . . . . . . 11
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                   | 
| 38 | 32, 37 | eqtr4d 2388 | 
. . . . . . . . . 10
          Nn                
Nn    
  Nn         
       
         1          1             
  Nn     1          1                   | 
| 39 | 38 | 3expa 1151 | 
. . . . . . . . 9
           Nn                 Nn       Nn         
       
         1          1                 Nn     1          1                   | 
| 40 | 39 | exp32 588 | 
. . . . . . . 8
          Nn                
Nn    
  Nn         
       
         1          1                 Nn      1    
     1                   | 
| 41 | 40 | rexlimdv 2738 | 
. . . . . . 7
          Nn                
Nn    
  Nn         
       
         1          1                  Nn   1    
     1                  | 
| 42 | 26, 41 | mpd 14 | 
. . . . . 6
          Nn                
Nn    
  Nn         
       
         1          1                   | 
| 43 | 42 | exp32 588 | 
. . . . 5
         Nn                 Nn       Nn         
       
          1    
     1                   | 
| 44 | 43 | rexlimdvv 2745 | 
. . . 4
         Nn                 Nn       Nn         
      
      1  
       1  
               | 
| 45 | 21, 44 | syl5bi 208 | 
. . 3
         Nn                 Nn       Nn                1                 1             
    | 
| 46 | 45 | ralrimivva 2707 | 
. 2
        Nn                 Nn      Nn           1  
              1                  | 
| 47 |   | eleq2 2414 | 
. . . 4
             1          1         | 
| 48 | 47 | rexbidv 2636 | 
. . 3
              
     1                 1  
      | 
| 49 | 48 | reu4 3031 | 
. 2
        Nn         1              
Nn   
     1              Nn      Nn           1  
              1                   | 
| 50 | 15, 46, 49 | sylanbrc 645 | 
1
        Nn                 Nn         1        |