| Step | Hyp | Ref
| Expression |
| 1 | | cntop1 21044 |
. . . 4
     |
| 2 | 1 | a1i 11 |
. . 3
  TopOn   
     |
| 3 | | eqid 2622 |
. . . . . . . 8
   |
| 4 | | eqid 2622 |
. . . . . . . 8
   |
| 5 | 3, 4 | cnf 21050 |
. . . . . . 7
           |
| 6 | | ffn 6045 |
. . . . . . 7
          |
| 7 | 5, 6 | syl 17 |
. . . . . 6
      |
| 8 | 7 | a1i 11 |
. . . . 5
  TopOn   
      |
| 9 | | simp2 1062 |
. . . . 5
  TopOn     |
| 10 | 8, 9 | jctird 567 |
. . . 4
  TopOn   
  

    |
| 11 | | df-f 5892 |
. . . 4
     
     |
| 12 | 10, 11 | syl6ibr 242 |
. . 3
  TopOn   
          |
| 13 | 2, 12 | jcad 555 |
. 2
  TopOn   
  
         |
| 14 | | cntop1 21044 |
. . . . 5
  
↾t  
  |
| 15 | 14 | adantl 482 |
. . . 4
   TopOn     ↾t      |
| 16 | 3 | toptopon 20722 |
. . . . . 6

TopOn     |
| 17 | 15, 16 | sylib 208 |
. . . . 5
   TopOn     ↾t    TopOn     |
| 18 | | resttopon 20965 |
. . . . . . 7
  TopOn    ↾t  TopOn    |
| 19 | 18 | 3adant2 1080 |
. . . . . 6
  TopOn    ↾t  TopOn    |
| 20 | 19 | adantr 481 |
. . . . 5
   TopOn     ↾t     ↾t  TopOn    |
| 21 | | simpr 477 |
. . . . 5
   TopOn     ↾t      ↾t     |
| 22 | | cnf2 21053 |
. . . . 5
  TopOn    ↾t  TopOn    ↾t           |
| 23 | 17, 20, 21, 22 | syl3anc 1326 |
. . . 4
   TopOn     ↾t           |
| 24 | 15, 23 | jca 554 |
. . 3
   TopOn     ↾t    
        |
| 25 | 24 | ex 450 |
. 2
  TopOn   
 
↾t             |
| 26 | | vex 3203 |
. . . . . . . . 9
 |
| 27 | 26 | inex1 4799 |
. . . . . . . 8
   |
| 28 | 27 | a1i 11 |
. . . . . . 7
    TopOn 
 
       
    |
| 29 | | simpl1 1064 |
. . . . . . . 8
   TopOn   
      
TopOn    |
| 30 | | toponmax 20730 |
. . . . . . . . . 10
 TopOn 
  |
| 31 | 29, 30 | syl 17 |
. . . . . . . . 9
   TopOn   
      
  |
| 32 | | simpl3 1066 |
. . . . . . . . 9
   TopOn   
      
  |
| 33 | 31, 32 | ssexd 4805 |
. . . . . . . 8
   TopOn   
      
  |
| 34 | | elrest 16088 |
. . . . . . . 8
  TopOn     ↾t  
     |
| 35 | 29, 33, 34 | syl2anc 693 |
. . . . . . 7
   TopOn   
      
 
↾t 


    |
| 36 | | imaeq2 5462 |
. . . . . . . . 9
                 |
| 37 | 36 | eleq1d 2686 |
. . . . . . . 8
                   |
| 38 | 37 | adantl 482 |
. . . . . . 7
    TopOn 
 
         
     
          |
| 39 | 28, 35, 38 | ralxfr2d 4882 |
. . . . . 6
   TopOn   
      
 
 ↾t                   |
| 40 | | simplrr 801 |
. . . . . . . . . 10
    TopOn 
 
       
       |
| 41 | | ffun 6048 |
. . . . . . . . . 10
        |
| 42 | | inpreima 6342 |
. . . . . . . . . 10

                     |
| 43 | 40, 41, 42 | 3syl 18 |
. . . . . . . . 9
    TopOn 
 
       
                     |
| 44 | | cnvimass 5485 |
. . . . . . . . . . . 12
    
 |
| 45 | | cnvimarndm 5486 |
. . . . . . . . . . . 12
      |
| 46 | 44, 45 | sseqtr4i 3638 |
. . . . . . . . . . 11
           |
| 47 | | simpll2 1101 |
. . . . . . . . . . . 12
    TopOn 
 
       
  |
| 48 | | imass2 5501 |
. . . . . . . . . . . 12

    
       |
| 49 | 47, 48 | syl 17 |
. . . . . . . . . . 11
    TopOn 
 
       
            |
| 50 | 46, 49 | syl5ss 3614 |
. . . . . . . . . 10
    TopOn 
 
       
            |
| 51 | | df-ss 3588 |
. . . . . . . . . 10
          
                   |
| 52 | 50, 51 | sylib 208 |
. . . . . . . . 9
    TopOn 
 
       
                   |
| 53 | 43, 52 | eqtrd 2656 |
. . . . . . . 8
    TopOn 
 
       
              |
| 54 | 53 | eleq1d 2686 |
. . . . . . 7
    TopOn 
 
       
       
        |
| 55 | 54 | ralbidva 2985 |
. . . . . 6
   TopOn   
      
 
      

        |
| 56 | | simprr 796 |
. . . . . . . 8
   TopOn   
      
       |
| 57 | 56, 32 | fssd 6057 |
. . . . . . 7
   TopOn   
      
       |
| 58 | 57 | biantrurd 529 |
. . . . . 6
   TopOn   
      
 
    
                |
| 59 | 39, 55, 58 | 3bitrrd 295 |
. . . . 5
   TopOn   
      
             
 
↾t           |
| 60 | 56 | biantrurd 529 |
. . . . 5
   TopOn   
      
 
 ↾t               
↾t            |
| 61 | 59, 60 | bitrd 268 |
. . . 4
   TopOn   
      
             
        ↾t            |
| 62 | | simprl 794 |
. . . . . 6
   TopOn   
      
  |
| 63 | 62, 16 | sylib 208 |
. . . . 5
   TopOn   
      
TopOn     |
| 64 | | iscn 21039 |
. . . . 5
  TopOn   TopOn  
         
         |
| 65 | 63, 29, 64 | syl2anc 693 |
. . . 4
   TopOn   
      
         
         |
| 66 | 19 | adantr 481 |
. . . . 5
   TopOn   
      
 ↾t  TopOn    |
| 67 | | iscn 21039 |
. . . . 5
  TopOn    ↾t  TopOn      ↾t  
        ↾t            |
| 68 | 63, 66, 67 | syl2anc 693 |
. . . 4
   TopOn   
      
   ↾t  
        ↾t            |
| 69 | 61, 65, 68 | 3bitr4d 300 |
. . 3
   TopOn   
      
  
  ↾t      |
| 70 | 69 | ex 450 |
. 2
  TopOn           
 

 ↾t       |
| 71 | 13, 25, 70 | pm5.21ndd 369 |
1
  TopOn   
 

 ↾t      |