| Step | Hyp | Ref
| Expression |
| 1 | | cntop1 14521 |
. . . 4
     |
| 2 | 1 | a1i 9 |
. . 3
  TopOn   
     |
| 3 | | eqid 2196 |
. . . . . . . 8
   |
| 4 | | eqid 2196 |
. . . . . . . 8
   |
| 5 | 3, 4 | cnf 14524 |
. . . . . . 7
           |
| 6 | 5 | ffnd 5411 |
. . . . . 6
      |
| 7 | 6 | a1i 9 |
. . . . 5
  TopOn   
      |
| 8 | | simp2 1000 |
. . . . 5
  TopOn     |
| 9 | 7, 8 | jctird 317 |
. . . 4
  TopOn   
  

    |
| 10 | | df-f 5263 |
. . . 4
     
     |
| 11 | 9, 10 | imbitrrdi 162 |
. . 3
  TopOn   
          |
| 12 | 2, 11 | jcad 307 |
. 2
  TopOn   
  
         |
| 13 | | cntop1 14521 |
. . . . 5
  
↾t  
  |
| 14 | 13 | adantl 277 |
. . . 4
   TopOn     ↾t      |
| 15 | 3 | toptopon 14338 |
. . . . . 6

TopOn     |
| 16 | 14, 15 | sylib 122 |
. . . . 5
   TopOn     ↾t    TopOn     |
| 17 | | resttopon 14491 |
. . . . . . 7
  TopOn    ↾t  TopOn    |
| 18 | 17 | 3adant2 1018 |
. . . . . 6
  TopOn    ↾t  TopOn    |
| 19 | 18 | adantr 276 |
. . . . 5
   TopOn     ↾t     ↾t  TopOn    |
| 20 | | simpr 110 |
. . . . 5
   TopOn     ↾t      ↾t     |
| 21 | | cnf2 14525 |
. . . . 5
  TopOn    ↾t  TopOn    ↾t           |
| 22 | 16, 19, 20, 21 | syl3anc 1249 |
. . . 4
   TopOn     ↾t           |
| 23 | 14, 22 | jca 306 |
. . 3
   TopOn     ↾t    
        |
| 24 | 23 | ex 115 |
. 2
  TopOn   
 
↾t             |
| 25 | | vex 2766 |
. . . . . . . . 9
 |
| 26 | 25 | inex1 4168 |
. . . . . . . 8
   |
| 27 | 26 | a1i 9 |
. . . . . . 7
    TopOn 
 
       
    |
| 28 | | simpl1 1002 |
. . . . . . . 8
   TopOn   
      
TopOn    |
| 29 | | toponmax 14345 |
. . . . . . . . . 10
 TopOn 
  |
| 30 | 28, 29 | syl 14 |
. . . . . . . . 9
   TopOn   
      
  |
| 31 | | simpl3 1004 |
. . . . . . . . 9
   TopOn   
      
  |
| 32 | 30, 31 | ssexd 4174 |
. . . . . . . 8
   TopOn   
      
  |
| 33 | | elrest 12948 |
. . . . . . . 8
  TopOn     ↾t  
     |
| 34 | 28, 32, 33 | syl2anc 411 |
. . . . . . 7
   TopOn   
      
 
↾t 


    |
| 35 | | imaeq2 5006 |
. . . . . . . . 9
                 |
| 36 | 35 | eleq1d 2265 |
. . . . . . . 8
                   |
| 37 | 36 | adantl 277 |
. . . . . . 7
    TopOn 
 
         
     
          |
| 38 | 27, 34, 37 | ralxfr2d 4500 |
. . . . . 6
   TopOn   
      
 
 ↾t                   |
| 39 | | simplrr 536 |
. . . . . . . . . 10
    TopOn 
 
       
       |
| 40 | | ffun 5413 |
. . . . . . . . . 10
        |
| 41 | | inpreima 5691 |
. . . . . . . . . 10

                     |
| 42 | 39, 40, 41 | 3syl 17 |
. . . . . . . . 9
    TopOn 
 
       
                     |
| 43 | | cnvimass 5033 |
. . . . . . . . . . . 12
    
 |
| 44 | | cnvimarndm 5034 |
. . . . . . . . . . . 12
      |
| 45 | 43, 44 | sseqtrri 3219 |
. . . . . . . . . . 11
           |
| 46 | | simpll2 1039 |
. . . . . . . . . . . 12
    TopOn 
 
       
  |
| 47 | | imass2 5046 |
. . . . . . . . . . . 12

    
       |
| 48 | 46, 47 | syl 14 |
. . . . . . . . . . 11
    TopOn 
 
       
            |
| 49 | 45, 48 | sstrid 3195 |
. . . . . . . . . 10
    TopOn 
 
       
            |
| 50 | | df-ss 3170 |
. . . . . . . . . 10
          
                   |
| 51 | 49, 50 | sylib 122 |
. . . . . . . . 9
    TopOn 
 
       
                   |
| 52 | 42, 51 | eqtrd 2229 |
. . . . . . . 8
    TopOn 
 
       
              |
| 53 | 52 | eleq1d 2265 |
. . . . . . 7
    TopOn 
 
       
       
        |
| 54 | 53 | ralbidva 2493 |
. . . . . 6
   TopOn   
      
 
      

        |
| 55 | | simprr 531 |
. . . . . . . 8
   TopOn   
      
       |
| 56 | 55, 31 | fssd 5423 |
. . . . . . 7
   TopOn   
      
       |
| 57 | 56 | biantrurd 305 |
. . . . . 6
   TopOn   
      
 
    
                |
| 58 | 38, 54, 57 | 3bitrrd 215 |
. . . . 5
   TopOn   
      
             
 
↾t           |
| 59 | 55 | biantrurd 305 |
. . . . 5
   TopOn   
      
 
 ↾t               
↾t            |
| 60 | 58, 59 | bitrd 188 |
. . . 4
   TopOn   
      
             
        ↾t            |
| 61 | | simprl 529 |
. . . . . 6
   TopOn   
      
  |
| 62 | 61, 15 | sylib 122 |
. . . . 5
   TopOn   
      
TopOn     |
| 63 | | iscn 14517 |
. . . . 5
  TopOn   TopOn  
         
         |
| 64 | 62, 28, 63 | syl2anc 411 |
. . . 4
   TopOn   
      
         
         |
| 65 | 18 | adantr 276 |
. . . . 5
   TopOn   
      
 ↾t  TopOn    |
| 66 | | iscn 14517 |
. . . . 5
  TopOn    ↾t  TopOn      ↾t  
        ↾t            |
| 67 | 62, 65, 66 | syl2anc 411 |
. . . 4
   TopOn   
      
   ↾t  
        ↾t            |
| 68 | 60, 64, 67 | 3bitr4d 220 |
. . 3
   TopOn   
      
  
  ↾t      |
| 69 | 68 | ex 115 |
. 2
  TopOn           
 

 ↾t       |
| 70 | 12, 24, 69 | pm5.21ndd 706 |
1
  TopOn   
 

 ↾t      |