| Step | Hyp | Ref
| Expression |
| 1 | | inex1g 4801 |
. . . 4
  
    |
| 2 | 1 | adantr 481 |
. . 3
         |
| 3 | | eqid 2622 |
. . . 4
     
   |
| 4 | | eqid 2622 |
. . . 4
                  

    
            |
| 5 | | eqid 2622 |
. . . 4
                  

    
            |
| 6 | 3, 4, 5 | ordtval 20993 |
. . 3
     ordTop               
      
               

    
                 |
| 7 | 2, 6 | syl 17 |
. 2
   ordTop               
      
               

    
                 |
| 8 | | ordttop 21004 |
. . . 4
 ordTop    |
| 9 | | resttop 20964 |
. . . 4
  ordTop    ordTop  ↾t    |
| 10 | 8, 9 | sylan 488 |
. . 3
    ordTop  ↾t    |
| 11 | | eqid 2622 |
. . . . . . . 8
 |
| 12 | 11 | psssdm2 17215 |
. . . . . . 7

        |
| 13 | 12 | adantr 481 |
. . . . . 6
   
       |
| 14 | 8 | adantr 481 |
. . . . . . 7
   ordTop    |
| 15 | | simpr 477 |
. . . . . . 7
     |
| 16 | 11 | ordttopon 20997 |
. . . . . . . . 9
 ordTop  TopOn    |
| 17 | 16 | adantr 481 |
. . . . . . . 8
   ordTop  TopOn    |
| 18 | | toponmax 20730 |
. . . . . . . 8
 ordTop  TopOn  ordTop    |
| 19 | 17, 18 | syl 17 |
. . . . . . 7
   ordTop    |
| 20 | | elrestr 16089 |
. . . . . . 7
  ordTop  ordTop  
   ordTop  ↾t    |
| 21 | 14, 15, 19, 20 | syl3anc 1326 |
. . . . . 6
      ordTop 
↾t    |
| 22 | 13, 21 | eqeltrd 2701 |
. . . . 5
   
    ordTop 
↾t    |
| 23 | 22 | snssd 4340 |
. . . 4
    
   
 ordTop 
↾t    |
| 24 | | rabeq 3192 |
. . . . . . . . 9
                        
      |
| 25 | 13, 24 | syl 17 |
. . . . . . . 8
                    
      |
| 26 | 13, 25 | mpteq12dv 4733 |
. . . . . . 7
                      
              |
| 27 | 26 | rneqd 5353 |
. . . . . 6
   

    
                           |
| 28 | | inrab2 3900 |
. . . . . . . . . 10
             |
| 29 | | inss2 3834 |
. . . . . . . . . . . . . 14

  |
| 30 | | simpr 477 |
. . . . . . . . . . . . . 14
    
          |
| 31 | 29, 30 | sseldi 3601 |
. . . . . . . . . . . . 13
    
        |
| 32 | | simpr 477 |
. . . . . . . . . . . . . . 15
  

  
    |
| 33 | 29, 32 | sseldi 3601 |
. . . . . . . . . . . . . 14
  

  
  |
| 34 | 33 | adantr 481 |
. . . . . . . . . . . . 13
    
        |
| 35 | | brinxp 5181 |
. . . . . . . . . . . . 13
 
      
      |
| 36 | 31, 34, 35 | syl2anc 693 |
. . . . . . . . . . . 12
    
        
         |
| 37 | 36 | notbid 308 |
. . . . . . . . . . 11
    
        
         |
| 38 | 37 | rabbidva 3188 |
. . . . . . . . . 10
  

  
                  |
| 39 | 28, 38 | syl5eq 2668 |
. . . . . . . . 9
  

  
                  |
| 40 | 14 | adantr 481 |
. . . . . . . . . 10
  

  
ordTop    |
| 41 | 15 | adantr 481 |
. . . . . . . . . 10
  

  
  |
| 42 | | simpl 473 |
. . . . . . . . . . 11
     |
| 43 | | inss1 3833 |
. . . . . . . . . . . 12

  |
| 44 | 43 | sseli 3599 |
. . . . . . . . . . 11
     |
| 45 | 11 | ordtopn1 20998 |
. . . . . . . . . . 11
       ordTop    |
| 46 | 42, 44, 45 | syl2an 494 |
. . . . . . . . . 10
  

  
    ordTop    |
| 47 | | elrestr 16089 |
. . . . . . . . . 10
  ordTop      ordTop  
       ordTop 
↾t    |
| 48 | 40, 41, 46, 47 | syl3anc 1326 |
. . . . . . . . 9
  

  
       ordTop 
↾t    |
| 49 | 39, 48 | eqeltrrd 2702 |
. . . . . . . 8
  

  
           ordTop  ↾t    |
| 50 | | eqid 2622 |
. . . . . . . 8
        
             
      |
| 51 | 49, 50 | fmptd 6385 |
. . . . . . 7
    
                   ordTop 
↾t    |
| 52 | | frn 6053 |
. . . . . . 7
  
                   ordTop 
↾t  
              ordTop  ↾t    |
| 53 | 51, 52 | syl 17 |
. . . . . 6
   
              ordTop  ↾t    |
| 54 | 27, 53 | eqsstrd 3639 |
. . . . 5
   

    
            ordTop  ↾t    |
| 55 | | rabeq 3192 |
. . . . . . . . 9
                        
      |
| 56 | 13, 55 | syl 17 |
. . . . . . . 8
                    
      |
| 57 | 13, 56 | mpteq12dv 4733 |
. . . . . . 7
                      
              |
| 58 | 57 | rneqd 5353 |
. . . . . 6
   

    
                           |
| 59 | | inrab2 3900 |
. . . . . . . . . 10
             |
| 60 | | brinxp 5181 |
. . . . . . . . . . . . 13
 
      
      |
| 61 | 34, 31, 60 | syl2anc 693 |
. . . . . . . . . . . 12
    
        
         |
| 62 | 61 | notbid 308 |
. . . . . . . . . . 11
    
        
         |
| 63 | 62 | rabbidva 3188 |
. . . . . . . . . 10
  

  
                  |
| 64 | 59, 63 | syl5eq 2668 |
. . . . . . . . 9
  

  
                  |
| 65 | 11 | ordtopn2 20999 |
. . . . . . . . . . 11
       ordTop    |
| 66 | 42, 44, 65 | syl2an 494 |
. . . . . . . . . 10
  

  
    ordTop    |
| 67 | | elrestr 16089 |
. . . . . . . . . 10
  ordTop      ordTop          ordTop 
↾t    |
| 68 | 40, 41, 66, 67 | syl3anc 1326 |
. . . . . . . . 9
  

  
       ordTop 
↾t    |
| 69 | 64, 68 | eqeltrrd 2702 |
. . . . . . . 8
  

  
           ordTop  ↾t    |
| 70 | | eqid 2622 |
. . . . . . . 8
        
             
      |
| 71 | 69, 70 | fmptd 6385 |
. . . . . . 7
    
                   ordTop 
↾t    |
| 72 | | frn 6053 |
. . . . . . 7
  
                   ordTop 
↾t  
              ordTop  ↾t    |
| 73 | 71, 72 | syl 17 |
. . . . . 6
   
              ordTop  ↾t    |
| 74 | 58, 73 | eqsstrd 3639 |
. . . . 5
   

    
            ordTop  ↾t    |
| 75 | 54, 74 | unssd 3789 |
. . . 4
     
    
             
                 ordTop  ↾t    |
| 76 | 23, 75 | unssd 3789 |
. . 3
      
      
               

    
            
 ordTop 
↾t    |
| 77 | | tgfiss 20795 |
. . 3
   ordTop  ↾t                            

    
            
 ordTop 
↾t                                   

    
                ordTop  ↾t    |
| 78 | 10, 76, 77 | syl2anc 693 |
. 2
                                   

    
                ordTop  ↾t    |
| 79 | 7, 78 | eqsstrd 3639 |
1
   ordTop     
 ordTop 
↾t    |