| Step | Hyp | Ref
| Expression |
| 1 | | cvmcn 31244 |
. . 3
  CovMap 

   |
| 2 | | cvmseu.1 |
. . . 4
  |
| 3 | | cvmfolem.2 |
. . . 4
  |
| 4 | 2, 3 | cnf 21050 |
. . 3
         |
| 5 | 1, 4 | syl 17 |
. 2
  CovMap 
      |
| 6 | | cvmcov.1 |
. . . . . 6
                       
    ↾t    
↾t        |
| 7 | 6, 3 | cvmcov 31245 |
. . . . 5
   CovMap   

       |
| 8 | 7 | ex 450 |
. . . 4
  CovMap 



        |
| 9 | | n0 3931 |
. . . . . . 7
            |
| 10 | 6 | cvmsn0 31250 |
. . . . . . . . . . . 12
       |
| 11 | 10 | ad2antll 765 |
. . . . . . . . . . 11
    CovMap 
          |
| 12 | | n0 3931 |
. . . . . . . . . . 11
    |
| 13 | 11, 12 | sylib 208 |
. . . . . . . . . 10
    CovMap 
           |
| 14 | | simprlr 803 |
. . . . . . . . . . . . . . . . . 18
    CovMap 
         
      |
| 15 | 6 | cvmsss 31249 |
. . . . . . . . . . . . . . . . . 18
       |
| 16 | 14, 15 | syl 17 |
. . . . . . . . . . . . . . . . 17
    CovMap 
            |
| 17 | | simprr 796 |
. . . . . . . . . . . . . . . . 17
    CovMap 
            |
| 18 | 16, 17 | sseldd 3604 |
. . . . . . . . . . . . . . . 16
    CovMap 
            |
| 19 | | elssuni 4467 |
. . . . . . . . . . . . . . . 16
    |
| 20 | 18, 19 | syl 17 |
. . . . . . . . . . . . . . 15
    CovMap 
         
   |
| 21 | 20, 2 | syl6sseqr 3652 |
. . . . . . . . . . . . . 14
    CovMap 
         
  |
| 22 | | simpll 790 |
. . . . . . . . . . . . . . . . 17
    CovMap 
         
 CovMap    |
| 23 | 6 | cvmsf1o 31254 |
. . . . . . . . . . . . . . . . 17
   CovMap     
         |
| 24 | 22, 14, 17, 23 | syl3anc 1326 |
. . . . . . . . . . . . . . . 16
    CovMap 
                  |
| 25 | | f1ocnv 6149 |
. . . . . . . . . . . . . . . 16
 
    
 
       |
| 26 | | f1of 6137 |
. . . . . . . . . . . . . . . 16
                 |
| 27 | 24, 25, 26 | 3syl 18 |
. . . . . . . . . . . . . . 15
    CovMap 
                   |
| 28 | | simprll 802 |
. . . . . . . . . . . . . . 15
    CovMap 
         
  |
| 29 | 27, 28 | ffvelrnd 6360 |
. . . . . . . . . . . . . 14
    CovMap 
                   |
| 30 | 21, 29 | sseldd 3604 |
. . . . . . . . . . . . 13
    CovMap 
                   |
| 31 | | f1ocnvfv2 6533 |
. . . . . . . . . . . . . . 15
       
                |
| 32 | 24, 28, 31 | syl2anc 693 |
. . . . . . . . . . . . . 14
    CovMap 
                         |
| 33 | | fvres 6207 |
. . . . . . . . . . . . . . 15
                                  |
| 34 | 29, 33 | syl 17 |
. . . . . . . . . . . . . 14
    CovMap 
                                    |
| 35 | 32, 34 | eqtr3d 2658 |
. . . . . . . . . . . . 13
    CovMap 
         
             |
| 36 | | fveq2 6191 |
. . . . . . . . . . . . . . 15
   
                     |
| 37 | 36 | eqeq2d 2632 |
. . . . . . . . . . . . . 14
   
        
              |
| 38 | 37 | rspcev 3309 |
. . . . . . . . . . . . 13
        
            
      |
| 39 | 30, 35, 38 | syl2anc 693 |
. . . . . . . . . . . 12
    CovMap 
          
      |
| 40 | 39 | expr 643 |
. . . . . . . . . . 11
    CovMap 
         
       |
| 41 | 40 | exlimdv 1861 |
. . . . . . . . . 10
    CovMap 
         

       |
| 42 | 13, 41 | mpd 15 |
. . . . . . . . 9
    CovMap 
        
      |
| 43 | 42 | expr 643 |
. . . . . . . 8
    CovMap 


    

       |
| 44 | 43 | exlimdv 1861 |
. . . . . . 7
    CovMap 


 
    
       |
| 45 | 9, 44 | syl5bi 232 |
. . . . . 6
    CovMap 


    

       |
| 46 | 45 | expimpd 629 |
. . . . 5
   CovMap          
       |
| 47 | 46 | rexlimdva 3031 |
. . . 4
  CovMap 
 
      
       |
| 48 | 8, 47 | syld 47 |
. . 3
  CovMap 


       |
| 49 | 48 | ralrimiv 2965 |
. 2
  CovMap 


      |
| 50 | | dffo3 6374 |
. 2
    
     

       |
| 51 | 5, 49, 50 | sylanbrc 698 |
1
  CovMap 
      |