| Step | Hyp | Ref
| Expression |
| 1 | | iunrab 4567 |
. . . 4
                                     |
| 2 | 1 | a1i 11 |
. . 3
  UPGraph
                                       |
| 3 | 2 | uneq1d 3766 |
. 2
  UPGraph
  
     

                    

                           |
| 4 | | unrab 3898 |
. . 3
                                                       |
| 5 | | simpl 473 |
. . . . . . . 8
     
    
      |
| 6 | 5 | rexlimivw 3029 |
. . . . . . 7
           
    
      |
| 7 | 6 | a1i 11 |
. . . . . 6
   UPGraph                           |
| 8 | | snidg 4206 |
. . . . . . . 8
     |
| 9 | 8 | ad2antlr 763 |
. . . . . . 7
   UPGraph  
    |
| 10 | | eleq2 2690 |
. . . . . . 7
                 |
| 11 | 9, 10 | syl5ibrcom 237 |
. . . . . 6
   UPGraph         
       |
| 12 | 7, 11 | jaod 395 |
. . . . 5
   UPGraph                                   |
| 13 | | upgruhgr 25997 |
. . . . . . . . 9
 UPGraph UHGraph  |
| 14 | | edglnl.e |
. . . . . . . . . 10
iEdg   |
| 15 | 14 | uhgrfun 25961 |
. . . . . . . . 9
 UHGraph
  |
| 16 | 13, 15 | syl 17 |
. . . . . . . 8
 UPGraph
  |
| 17 | 16 | adantr 481 |
. . . . . . 7
  UPGraph
   |
| 18 | 14 | iedgedg 25943 |
. . . . . . 7
       Edg    |
| 19 | 17, 18 | sylan 488 |
. . . . . 6
   UPGraph       Edg    |
| 20 | | edglnl.v |
. . . . . . . . . 10
Vtx   |
| 21 | | eqid 2622 |
. . . . . . . . . 10
Edg  Edg   |
| 22 | 20, 21 | upgredg 26032 |
. . . . . . . . 9
  UPGraph
    Edg  


         |
| 23 | 22 | ex 450 |
. . . . . . . 8
 UPGraph      Edg   
          |
| 24 | 23 | ad2antrr 762 |
. . . . . . 7
   UPGraph        Edg  

          |
| 25 | | dfsn2 4190 |
. . . . . . . . . . . . . . . . . . . . . 22
 
    |
| 26 | 25 | eqcomi 2631 |
. . . . . . . . . . . . . . . . . . . . 21
      |
| 27 | | elsni 4194 |
. . . . . . . . . . . . . . . . . . . . . 22
     |
| 28 | | sneq 4187 |
. . . . . . . . . . . . . . . . . . . . . . 23
  
    |
| 29 | 28 | eqcomd 2628 |
. . . . . . . . . . . . . . . . . . . . . 22
  
    |
| 30 | 27, 29 | syl 17 |
. . . . . . . . . . . . . . . . . . . . 21
         |
| 31 | 26, 30 | syl5eq 2668 |
. . . . . . . . . . . . . . . . . . . 20
     
    |
| 32 | 31, 26 | eleq2s 2719 |
. . . . . . . . . . . . . . . . . . 19
           |
| 33 | | preq2 4269 |
. . . . . . . . . . . . . . . . . . . . 21
         |
| 34 | 33 | eleq2d 2687 |
. . . . . . . . . . . . . . . . . . . 20
 
  
      |
| 35 | 33 | eqeq1d 2624 |
. . . . . . . . . . . . . . . . . . . 20
    
    
     |
| 36 | 34, 35 | imbi12d 334 |
. . . . . . . . . . . . . . . . . . 19
        
  
             |
| 37 | 32, 36 | mpbiri 248 |
. . . . . . . . . . . . . . . . . 18
 
           |
| 38 | 37 | imp 445 |
. . . . . . . . . . . . . . . . 17
 
      
    |
| 39 | 38 | olcd 408 |
. . . . . . . . . . . . . . . 16
 
                           |
| 40 | 39 | expcom 451 |
. . . . . . . . . . . . . . 15
                             |
| 41 | 40 | 3ad2ant3 1084 |
. . . . . . . . . . . . . 14
  

   

                        |
| 42 | 41 | com12 32 |
. . . . . . . . . . . . 13
   

   
 
        
      
      |
| 43 | | simpr3 1069 |
. . . . . . . . . . . . . . . 16
  


          |
| 44 | | simpl 473 |
. . . . . . . . . . . . . . . . . 18
  


       |
| 45 | 44 | necomd 2849 |
. . . . . . . . . . . . . . . . 17
  


       |
| 46 | | simpr2 1068 |
. . . . . . . . . . . . . . . . 17
  


     
   |
| 47 | | prproe 4434 |
. . . . . . . . . . . . . . . . 17
        
          |
| 48 | 43, 45, 46, 47 | syl3anc 1326 |
. . . . . . . . . . . . . . . 16
  


                |
| 49 | | r19.42v 3092 |
. . . . . . . . . . . . . . . 16
                               |
| 50 | 43, 48, 49 | sylanbrc 698 |
. . . . . . . . . . . . . . 15
  


                     |
| 51 | 50 | orcd 407 |
. . . . . . . . . . . . . 14
  


      
                     |
| 52 | 51 | ex 450 |
. . . . . . . . . . . . 13
   

   
 
        
      
      |
| 53 | 42, 52 | pm2.61ine 2877 |
. . . . . . . . . . . 12
  

   
 
        
      
     |
| 54 | 53 | 3exp 1264 |
. . . . . . . . . . 11
  

                             |
| 55 | 54 | ad2antlr 763 |
. . . . . . . . . 10
   UPGraph      
    
                       |
| 56 | 55 | imp 445 |
. . . . . . . . 9
    UPGraph

 
 
                            |
| 57 | | eleq2 2690 |
. . . . . . . . . 10
        
   
      |
| 58 | | eleq2 2690 |
. . . . . . . . . . . . 13
            
      |
| 59 | 57, 58 | anbi12d 747 |
. . . . . . . . . . . 12
                              |
| 60 | 59 | rexbidv 3052 |
. . . . . . . . . . 11
         
         
                      |
| 61 | | eqeq1 2626 |
. . . . . . . . . . 11
                 
     |
| 62 | 60, 61 | orbi12d 746 |
. . . . . . . . . 10
                                                         |
| 63 | 57, 62 | imbi12d 334 |
. . . . . . . . 9
                                                                    |
| 64 | 56, 63 | syl5ibrcom 237 |
. . . . . . . 8
    UPGraph

 
 
            
 
                          |
| 65 | 64 | rexlimdvva 3038 |
. . . . . . 7
   UPGraph                                              |
| 66 | 24, 65 | syld 47 |
. . . . . 6
   UPGraph        Edg                                   |
| 67 | 19, 66 | mpd 15 |
. . . . 5
   UPGraph                                   |
| 68 | 12, 67 | impbid 202 |
. . . 4
   UPGraph                                   |
| 69 | 68 | rabbidva 3188 |
. . 3
  UPGraph
                           
       |
| 70 | 4, 69 | syl5eq 2668 |
. 2
  UPGraph
                                     |
| 71 | 3, 70 | eqtrd 2656 |
1
  UPGraph
  
     

                           |