| Step | Hyp | Ref
| Expression |
| 1 | | kgentopon 21341 |
. . 3
 TopOn 
𝑘Gen  TopOn    |
| 2 | | iscn 21039 |
. . 3
  𝑘Gen  TopOn 
TopOn     𝑘Gen  
     
     𝑘Gen      |
| 3 | 1, 2 | sylan 488 |
. 2
  TopOn  TopOn  
  𝑘Gen  
     
     𝑘Gen      |
| 4 | | elkgen 21339 |
. . . . . . 7
 TopOn 
      𝑘Gen 
      
   ↾t 
       
↾t       |
| 5 | 4 | ad2antrr 762 |
. . . . . 6
   TopOn  TopOn  
           𝑘Gen 
      
   ↾t 
       
↾t       |
| 6 | | cnvimass 5485 |
. . . . . . . 8
    
 |
| 7 | | fdm 6051 |
. . . . . . . . 9
       |
| 8 | 7 | adantl 482 |
. . . . . . . 8
   TopOn  TopOn  
       |
| 9 | 6, 8 | syl5sseq 3653 |
. . . . . . 7
   TopOn  TopOn  
            |
| 10 | 9 | biantrurd 529 |
. . . . . 6
   TopOn  TopOn  
      
   ↾t          ↾t  
      
   ↾t 
       
↾t       |
| 11 | 5, 10 | bitr4d 271 |
. . . . 5
   TopOn  TopOn  
           𝑘Gen 
    ↾t          ↾t      |
| 12 | 11 | ralbidv 2986 |
. . . 4
   TopOn  TopOn  
      
     𝑘Gen 

    ↾t          ↾t      |
| 13 | | simpll 790 |
. . . . . . . . . . . 12
   TopOn  TopOn  
     TopOn    |
| 14 | | elpwi 4168 |
. . . . . . . . . . . 12
 
  |
| 15 | | resttopon 20965 |
. . . . . . . . . . . 12
  TopOn    ↾t  TopOn    |
| 16 | 13, 14, 15 | syl2an 494 |
. . . . . . . . . . 11
    TopOn 
TopOn           ↾t  TopOn    |
| 17 | | simpllr 799 |
. . . . . . . . . . 11
    TopOn 
TopOn          TopOn    |
| 18 | | iscn 21039 |
. . . . . . . . . . 11
  
↾t  TopOn 
TopOn       
↾t  
       
        ↾t      |
| 19 | 16, 17, 18 | syl2anc 693 |
. . . . . . . . . 10
    TopOn 
TopOn               ↾t          
  
    
↾t      |
| 20 | | simpr 477 |
. . . . . . . . . . . 12
   TopOn  TopOn  
           |
| 21 | | fssres 6070 |
. . . . . . . . . . . 12
               |
| 22 | 20, 14, 21 | syl2an 494 |
. . . . . . . . . . 11
    TopOn 
TopOn                  |
| 23 | 22 | biantrurd 529 |
. . . . . . . . . 10
    TopOn 
TopOn           
        ↾t         
  
    
↾t      |
| 24 | 19, 23 | bitr4d 271 |
. . . . . . . . 9
    TopOn 
TopOn               ↾t            ↾t     |
| 25 | | cnvresima 5623 |
. . . . . . . . . . 11
               |
| 26 | 25 | eleq1i 2692 |
. . . . . . . . . 10
         ↾t         
↾t    |
| 27 | 26 | ralbii 2980 |
. . . . . . . . 9
 
        ↾t           ↾t    |
| 28 | 24, 27 | syl6bb 276 |
. . . . . . . 8
    TopOn 
TopOn               ↾t            ↾t     |
| 29 | 28 | imbi2d 330 |
. . . . . . 7
    TopOn 
TopOn             ↾t 
   
↾t   
  ↾t  
        ↾t      |
| 30 | | r19.21v 2960 |
. . . . . . 7
 
 
↾t         
↾t     ↾t 

       
↾t     |
| 31 | 29, 30 | syl6bbr 278 |
. . . . . 6
    TopOn 
TopOn             ↾t 
   
↾t   

  ↾t          ↾t      |
| 32 | 31 | ralbidva 2985 |
. . . . 5
   TopOn  TopOn  
      
   ↾t  
   ↾t    
    ↾t 
       
↾t      |
| 33 | | ralcom 3098 |
. . . . 5
 

   ↾t 
       
↾t   
    ↾t 
       
↾t     |
| 34 | 32, 33 | syl6rbbr 279 |
. . . 4
   TopOn  TopOn  
      

   ↾t          ↾t  
    ↾t      ↾t       |
| 35 | 12, 34 | bitrd 268 |
. . 3
   TopOn  TopOn  
      
     𝑘Gen 
    ↾t      ↾t       |
| 36 | 35 | pm5.32da 673 |
. 2
  TopOn  TopOn  
            𝑘Gen            ↾t      ↾t        |
| 37 | 3, 36 | bitrd 268 |
1
  TopOn  TopOn  
  𝑘Gen  
     
   ↾t 
   
↾t        |