| Step | Hyp | Ref
| Expression |
| 1 | | isfcf 21838 |
. 2
  TopOn     
     
     




           |
| 2 | | simpll1 1100 |
. . . . . . . 8
    TopOn 
         
          
TopOn    |
| 3 | | topontop 20718 |
. . . . . . . 8
 TopOn 
  |
| 4 | 2, 3 | syl 17 |
. . . . . . 7
    TopOn 
         
          
  |
| 5 | | simpr 477 |
. . . . . . . 8
    TopOn 
         
          
            |
| 6 | | eqid 2622 |
. . . . . . . . 9
   |
| 7 | 6 | neii1 20910 |
. . . . . . . 8
 
              |
| 8 | 4, 5, 7 | syl2anc 693 |
. . . . . . 7
    TopOn 
         
              |
| 9 | 6 | ntrss2 20861 |
. . . . . . 7
           
  |
| 10 | 4, 8, 9 | syl2anc 693 |
. . . . . 6
    TopOn 
         
                     |
| 11 | | simplr 792 |
. . . . . . . . . . . 12
    TopOn 
         
          
  |
| 12 | | toponuni 20719 |
. . . . . . . . . . . . 13
 TopOn 
   |
| 13 | 2, 12 | syl 17 |
. . . . . . . . . . . 12
    TopOn 
         
          
   |
| 14 | 11, 13 | eleqtrd 2703 |
. . . . . . . . . . 11
    TopOn 
         
          
   |
| 15 | 14 | snssd 4340 |
. . . . . . . . . 10
    TopOn 
         
                |
| 16 | 6 | neiint 20908 |
. . . . . . . . . 10
    
 
          
             |
| 17 | 4, 15, 8, 16 | syl3anc 1326 |
. . . . . . . . 9
    TopOn 
         
                     
             |
| 18 | 5, 17 | mpbid 222 |
. . . . . . . 8
    TopOn 
         
                       |
| 19 | | snssg 4327 |
. . . . . . . . 9
 
       
             |
| 20 | 11, 19 | syl 17 |
. . . . . . . 8
    TopOn 
         
                                 |
| 21 | 18, 20 | mpbird 247 |
. . . . . . 7
    TopOn 
         
          
          |
| 22 | 6 | ntropn 20853 |
. . . . . . . . 9
              |
| 23 | 4, 8, 22 | syl2anc 693 |
. . . . . . . 8
    TopOn 
         
                     |
| 24 | | eleq2 2690 |
. . . . . . . . . 10
        

           |
| 25 | | ineq1 3807 |
. . . . . . . . . . . 12
        
                      |
| 26 | 25 | neeq1d 2853 |
. . . . . . . . . . 11
        
 
             
        |
| 27 | 26 | ralbidv 2986 |
. . . . . . . . . 10
        
 

              
        |
| 28 | 24, 27 | imbi12d 334 |
. . . . . . . . 9
        
 
       
                  
         |
| 29 | 28 | rspcv 3305 |
. . . . . . . 8
        
 

        
        
                  |
| 30 | 23, 29 | syl 17 |
. . . . . . 7
    TopOn 
         
             

                         
         |
| 31 | 21, 30 | mpid 44 |
. . . . . 6
    TopOn 
         
             

       
        
        |
| 32 | | ssrin 3838 |
. . . . . . . 8
        
              
       |
| 33 | | ssn0 3976 |
. . . . . . . . 9
          
     
                            |
| 34 | 33 | ex 450 |
. . . . . . . 8
               
                    
        |
| 35 | 32, 34 | syl 17 |
. . . . . . 7
        
               
        |
| 36 | 35 | ralimdv 2963 |
. . . . . 6
        
 
              
         |
| 37 | 10, 31, 36 | sylsyld 61 |
. . . . 5
    TopOn 
         
             

       

        |
| 38 | 37 | ralrimdva 2969 |
. . . 4
   TopOn     
       

                    
         |
| 39 | | simpl1 1064 |
. . . . . . . . . 10
   TopOn     
      TopOn    |
| 40 | 39, 3 | syl 17 |
. . . . . . . . 9
   TopOn     
        |
| 41 | | opnneip 20923 |
. . . . . . . . . 10
 
             |
| 42 | 41 | 3expb 1266 |
. . . . . . . . 9
  
              |
| 43 | 40, 42 | sylan 488 |
. . . . . . . 8
    TopOn 
         

              |
| 44 | | ineq1 3807 |
. . . . . . . . . . 11
 
             |
| 45 | 44 | neeq1d 2853 |
. . . . . . . . . 10
                 |
| 46 | 45 | ralbidv 2986 |
. . . . . . . . 9
  

               |
| 47 | 46 | rspcv 3305 |
. . . . . . . 8
            
           
      
         |
| 48 | 43, 47 | syl 17 |
. . . . . . 7
    TopOn 
         

               
      
         |
| 49 | 48 | expr 643 |
. . . . . 6
    TopOn 
         
 
             
      
          |
| 50 | 49 | com23 86 |
. . . . 5
    TopOn 
         
  
           
      
           |
| 51 | 50 | ralrimdva 2969 |
. . . 4
   TopOn     
       
           
      


          |
| 52 | 38, 51 | impbid 202 |
. . 3
   TopOn     
       

       
            
         |
| 53 | 52 | pm5.32da 673 |
. 2
  TopOn     
        
        

            
          |
| 54 | 1, 53 | bitrd 268 |
1
  TopOn     
     
     

            
          |