| Step | Hyp | Ref
| Expression |
| 1 | | txcn.1 |
. . . . 5
  |
| 2 | 1 | toptopon 20722 |
. . . 4

TopOn    |
| 3 | | txcn.2 |
. . . . 5
  |
| 4 | 3 | toptopon 20722 |
. . . 4

TopOn    |
| 5 | | txcn.5 |
. . . . . . 7
   |
| 6 | | txcn.3 |
. . . . . . . 8
   |
| 7 | 6 | reseq2i 5393 |
. . . . . . 7
  
    |
| 8 | 5, 7 | eqtri 2644 |
. . . . . 6
     |
| 9 | | tx1cn 21412 |
. . . . . 6
  TopOn  TopOn  
          |
| 10 | 8, 9 | syl5eqel 2705 |
. . . . 5
  TopOn  TopOn  
      |
| 11 | | txcn.6 |
. . . . . . 7
   |
| 12 | 6 | reseq2i 5393 |
. . . . . . 7
  
    |
| 13 | 11, 12 | eqtri 2644 |
. . . . . 6
     |
| 14 | | tx2cn 21413 |
. . . . . 6
  TopOn  TopOn  
          |
| 15 | 13, 14 | syl5eqel 2705 |
. . . . 5
  TopOn  TopOn  
      |
| 16 | | cnco 21070 |
. . . . . . 7
     
           |
| 17 | | cnco 21070 |
. . . . . . 7
     
           |
| 18 | 16, 17 | anim12dan 882 |
. . . . . 6
      
               
      |
| 19 | 18 | expcom 451 |
. . . . 5
     
              
        |
| 20 | 10, 15, 19 | syl2anc 693 |
. . . 4
  TopOn  TopOn  
         
        |
| 21 | 2, 4, 20 | syl2anb 496 |
. . 3
 
          
        |
| 22 | 21 | 3adant3 1081 |
. 2
 
              
        |
| 23 | | cntop1 21044 |
. . . . . . . 8
       |
| 24 | 23 | ad2antrl 764 |
. . . . . . 7
            
        |
| 25 | | txcn.4 |
. . . . . . . 8
  |
| 26 | 25 | topopn 20711 |
. . . . . . 7
   |
| 27 | 24, 26 | syl 17 |
. . . . . 6
            
        |
| 28 | 25, 1 | cnf 21050 |
. . . . . . 7
     
       |
| 29 | 28 | ad2antrl 764 |
. . . . . 6
            
      
       |
| 30 | 25, 3 | cnf 21050 |
. . . . . . 7
     
       |
| 31 | 30 | ad2antll 765 |
. . . . . 6
            
      
       |
| 32 | 8, 13 | upxp 21426 |
. . . . . . 7
  
     
               
   
      |
| 33 | | feq3 6028 |
. . . . . . . . . 10
       
         |
| 34 | 6, 33 | ax-mp 5 |
. . . . . . . . 9
    
        |
| 35 | 34 | 3anbi1i 1253 |
. . . . . . . 8
      
   
         

           |
| 36 | 35 | eubii 2492 |
. . . . . . 7
        
   
   
       

           |
| 37 | 32, 36 | sylibr 224 |
. . . . . 6
  
     
             
   
      |
| 38 | 27, 29, 31, 37 | syl3anc 1326 |
. . . . 5
            
             
   
      |
| 39 | | euex 2494 |
. . . . 5
        
   
           
   
      |
| 40 | 38, 39 | syl 17 |
. . . 4
            
                        |
| 41 | | simpll3 1102 |
. . . . . . 7
   
          
          
   
    
      |
| 42 | 27 | adantr 481 |
. . . . . . 7
   
          
          
   
    
  |
| 43 | 1 | topopn 20711 |
. . . . . . . . . 10
   |
| 44 | 3 | topopn 20711 |
. . . . . . . . . 10
   |
| 45 | | xpexg 6960 |
. . . . . . . . . . 11
 
     |
| 46 | 6, 45 | syl5eqel 2705 |
. . . . . . . . . 10
 
   |
| 47 | 43, 44, 46 | syl2an 494 |
. . . . . . . . 9
 
   |
| 48 | 47 | 3adant3 1081 |
. . . . . . . 8
 
    
  |
| 49 | 48 | ad2antrr 762 |
. . . . . . 7
   
          
          
   
    
  |
| 50 | | fex2 7121 |
. . . . . . 7
     
   |
| 51 | 41, 42, 49, 50 | syl3anc 1326 |
. . . . . 6
   
          
          
   
    
  |
| 52 | | eumo 2499 |
. . . . . . . 8
        
   
           
   
      |
| 53 | 38, 52 | syl 17 |
. . . . . . 7
            
             
   
      |
| 54 | 53 | adantr 481 |
. . . . . 6
   
          
          
   
    
                  |
| 55 | | simpr 477 |
. . . . . 6
   
          
          
   
    
     
   
      |
| 56 | | 3anass 1042 |
. . . . . . . 8
      
   
             
        |
| 57 | | coeq2 5280 |
. . . . . . . . . . . 12
 
     |
| 58 | | coeq2 5280 |
. . . . . . . . . . . 12
 
     |
| 59 | 57, 58 | jca 554 |
. . . . . . . . . . 11
      
      |
| 60 | 59 | eqcoms 2630 |
. . . . . . . . . 10
      
      |
| 61 | 60 | biantrud 528 |
. . . . . . . . 9
     
          
        |
| 62 | | feq1 6026 |
. . . . . . . . 9
     
       |
| 63 | 61, 62 | bitr3d 270 |
. . . . . . . 8
           
     
       |
| 64 | 56, 63 | syl5bb 272 |
. . . . . . 7
                       |
| 65 | 64 | moi2 3387 |
. . . . . 6
          
   
           
   
         
  |
| 66 | 51, 54, 55, 41, 65 | syl22anc 1327 |
. . . . 5
   
          
          
   
    
  |
| 67 | | eqid 2622 |
. . . . . . . . . 10
     |
| 68 | 67, 1, 3, 6, 5, 11 | uptx 21428 |
. . . . . . . . 9
      
                      |
| 69 | 68 | adantl 482 |
. . . . . . . 8
            
      
          
      |
| 70 | | df-reu 2919 |
. . . . . . . . . 10
            
        
       
       |
| 71 | | euex 2494 |
. . . . . . . . . 10
            
                 
        |
| 72 | 70, 71 | sylbi 207 |
. . . . . . . . 9
            
        
       
       |
| 73 | | eqid 2622 |
. . . . . . . . . . . . . . 15
       |
| 74 | 25, 73 | cnf 21050 |
. . . . . . . . . . . . . 14
  
 
         |
| 75 | 1, 3 | txuni 21395 |
. . . . . . . . . . . . . . . . . 18
 
        |
| 76 | 6, 75 | syl5eq 2668 |
. . . . . . . . . . . . . . . . 17
 
      |
| 77 | 76 | 3adant3 1081 |
. . . . . . . . . . . . . . . 16
 
    
     |
| 78 | 77 | adantr 481 |
. . . . . . . . . . . . . . 15
            
           |
| 79 | 78 | feq3d 6032 |
. . . . . . . . . . . . . 14
            
          
          |
| 80 | 74, 79 | syl5ibr 236 |
. . . . . . . . . . . . 13
            
                  |
| 81 | 80 | anim1d 588 |
. . . . . . . . . . . 12
            
                
                         |
| 82 | 81, 56 | syl6ibr 242 |
. . . . . . . . . . 11
            
                
           
   
       |
| 83 | | simpl 473 |
. . . . . . . . . . . 12
                       |
| 84 | 83 | a1i 11 |
. . . . . . . . . . 11
            
                
             |
| 85 | 82, 84 | jcad 555 |
. . . . . . . . . 10
            
                
                             |
| 86 | 85 | eximdv 1846 |
. . . . . . . . 9
            
                  
              
   
   
        |
| 87 | 72, 86 | syl5 34 |
. . . . . . . 8
            
       
          
            
   
            |
| 88 | 69, 87 | mpd 15 |
. . . . . . 7
            
              
   
   
       |
| 89 | | eupick 2536 |
. . . . . . 7
         
   
                                         

      |
| 90 | 38, 88, 89 | syl2anc 693 |
. . . . . 6
            
                    

      |
| 91 | 90 | imp 445 |
. . . . 5
   
          
          
   
    

     |
| 92 | 66, 91 | eqeltrrd 2702 |
. . . 4
   
          
          
   
    

     |
| 93 | 40, 92 | exlimddv 1863 |
. . 3
            
            |
| 94 | 93 | ex 450 |
. 2
 
          
    

      |
| 95 | 22, 94 | impbid 202 |
1
 
                       |