| Step | Hyp | Ref
| Expression |
| 1 | | eqid 2209 |
. . . . 5
Vtx  Vtx   |
| 2 | | ushgredgedg.i |
. . . . 5
iEdg   |
| 3 | 1, 2 | ushgrfm 15839 |
. . . 4
 USHGraph       Vtx      |
| 4 | 3 | adantr 276 |
. . 3
  USHGraph
       Vtx  
   |
| 5 | | ssrab2 3289 |
. . 3
     
 |
| 6 | | f1ores 5563 |
. . 3
      
 Vtx    
       
        
          
        |
| 7 | 4, 5, 6 | sylancl 413 |
. 2
  USHGraph
           
          
        |
| 8 | | ushgredgedg.f |
. . . . 5
       |
| 9 | | ushgredgedg.a |
. . . . . . 7

      |
| 10 | 9 | a1i 9 |
. . . . . 6
  USHGraph
 
       |
| 11 | | eqidd 2210 |
. . . . . 6
   USHGraph             |
| 12 | 10, 11 | mpteq12dva 4144 |
. . . . 5
  USHGraph
                     |
| 13 | 8, 12 | eqtrid 2254 |
. . . 4
  USHGraph
  
            |
| 14 | | f1f 5507 |
. . . . . . . 8
       Vtx  
       Vtx      |
| 15 | 3, 14 | syl 14 |
. . . . . . 7
 USHGraph       Vtx      |
| 16 | 5 | a1i 9 |
. . . . . . 7
 USHGraph         |
| 17 | 15, 16 | feqresmpt 5661 |
. . . . . 6
 USHGraph  
       
            |
| 18 | 17 | adantr 276 |
. . . . 5
  USHGraph
          
            |
| 19 | 18 | eqcomd 2215 |
. . . 4
  USHGraph
             
         |
| 20 | 13, 19 | eqtrd 2242 |
. . 3
  USHGraph
  
        |
| 21 | | ushgruhgr 15845 |
. . . . . . . . 9
 USHGraph UHGraph |
| 22 | | eqid 2209 |
. . . . . . . . . 10
iEdg  iEdg   |
| 23 | 22 | uhgrfun 15842 |
. . . . . . . . 9
 UHGraph
iEdg    |
| 24 | 21, 23 | syl 14 |
. . . . . . . 8
 USHGraph
iEdg    |
| 25 | 2 | funeqi 5315 |
. . . . . . . 8
 iEdg    |
| 26 | 24, 25 | sylibr 134 |
. . . . . . 7
 USHGraph
  |
| 27 | 26 | adantr 276 |
. . . . . 6
  USHGraph
   |
| 28 | | dfimafn 5655 |
. . . . . 6
  
         
       
             |
| 29 | 27, 5, 28 | sylancl 413 |
. . . . 5
  USHGraph
             
            |
| 30 | | fveq2 5603 |
. . . . . . . . . . . 12
           |
| 31 | 30 | eleq2d 2279 |
. . . . . . . . . . 11
 
   
       |
| 32 | 31 | elrab 2939 |
. . . . . . . . . 10
      
        |
| 33 | | simpl 109 |
. . . . . . . . . . . . . . . 16
 
    
  |
| 34 | | fvelrn 5739 |
. . . . . . . . . . . . . . . . 17
         |
| 35 | 2 | eqcomi 2213 |
. . . . . . . . . . . . . . . . . . 19
iEdg   |
| 36 | 35 | rneqi 4928 |
. . . . . . . . . . . . . . . . . 18
iEdg   |
| 37 | 36 | eleq2i 2276 |
. . . . . . . . . . . . . . . . 17
     iEdg 
      |
| 38 | 34, 37 | sylibr 134 |
. . . . . . . . . . . . . . . 16
       iEdg    |
| 39 | 27, 33, 38 | syl2an 289 |
. . . . . . . . . . . . . . 15
   USHGraph  
          iEdg    |
| 40 | 39 | 3adant3 1022 |
. . . . . . . . . . . . . 14
   USHGraph  
    
    
    iEdg    |
| 41 | | eleq1 2272 |
. . . . . . . . . . . . . . . 16
      iEdg 
    iEdg     |
| 42 | 41 | eqcoms 2212 |
. . . . . . . . . . . . . . 15
      iEdg 
    iEdg     |
| 43 | 42 | 3ad2ant3 1025 |
. . . . . . . . . . . . . 14
   USHGraph  
    
    
 iEdg      iEdg     |
| 44 | 40, 43 | mpbird 167 |
. . . . . . . . . . . . 13
   USHGraph  
    
    
iEdg    |
| 45 | | ushgredgedg.e |
. . . . . . . . . . . . . . . . 17
Edg   |
| 46 | | edgvalg 15825 |
. . . . . . . . . . . . . . . . 17
 USHGraph Edg  iEdg    |
| 47 | 45, 46 | eqtrid 2254 |
. . . . . . . . . . . . . . . 16
 USHGraph iEdg    |
| 48 | 47 | eleq2d 2279 |
. . . . . . . . . . . . . . 15
 USHGraph  iEdg     |
| 49 | 48 | adantr 276 |
. . . . . . . . . . . . . 14
  USHGraph
 
iEdg     |
| 50 | 49 | 3ad2ant1 1023 |
. . . . . . . . . . . . 13
   USHGraph  
    
    

iEdg     |
| 51 | 44, 50 | mpbird 167 |
. . . . . . . . . . . 12
   USHGraph  
    
    
  |
| 52 | | eleq2 2273 |
. . . . . . . . . . . . . . . 16
     
   
   |
| 53 | 52 | biimpcd 159 |
. . . . . . . . . . . . . . 15
         
   |
| 54 | 53 | adantl 277 |
. . . . . . . . . . . . . 14
 
    
    
   |
| 55 | 54 | a1i 9 |
. . . . . . . . . . . . 13
  USHGraph
       
    
    |
| 56 | 55 | 3imp 1198 |
. . . . . . . . . . . 12
   USHGraph  
    
    
  |
| 57 | 51, 56 | jca 306 |
. . . . . . . . . . 11
   USHGraph  
    
    

   |
| 58 | 57 | 3exp 1207 |
. . . . . . . . . 10
  USHGraph
       
    
      |
| 59 | 32, 58 | biimtrid 152 |
. . . . . . . . 9
  USHGraph
            

     |
| 60 | 59 | rexlimdv 2627 |
. . . . . . . 8
  USHGraph
  
          
    |
| 61 | 24 | funfnd 5325 |
. . . . . . . . . . . . 13
 USHGraph iEdg  iEdg    |
| 62 | | fvelrnb 5654 |
. . . . . . . . . . . . 13
 iEdg  iEdg   iEdg 
 iEdg    iEdg        |
| 63 | 61, 62 | syl 14 |
. . . . . . . . . . . 12
 USHGraph  iEdg   iEdg    iEdg        |
| 64 | 35 | dmeqi 4901 |
. . . . . . . . . . . . . . . . . . . . . . 23
iEdg   |
| 65 | 64 | eleq2i 2276 |
. . . . . . . . . . . . . . . . . . . . . 22
 iEdg 
  |
| 66 | 65 | biimpi 120 |
. . . . . . . . . . . . . . . . . . . . 21
 iEdg    |
| 67 | 66 | adantr 276 |
. . . . . . . . . . . . . . . . . . . 20
  iEdg   iEdg     
  |
| 68 | 67 | adantl 277 |
. . . . . . . . . . . . . . . . . . 19
   USHGraph   iEdg   iEdg         |
| 69 | 35 | fveq1i 5604 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
 iEdg          |
| 70 | 69 | eqeq2i 2220 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
  iEdg           |
| 71 | 70 | biimpi 120 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
  iEdg    
      |
| 72 | 71 | eqcoms 2212 |
. . . . . . . . . . . . . . . . . . . . . . . 24
  iEdg           |
| 73 | 72 | eleq2d 2279 |
. . . . . . . . . . . . . . . . . . . . . . 23
  iEdg     
       |
| 74 | 73 | biimpcd 159 |
. . . . . . . . . . . . . . . . . . . . . 22
   iEdg    
       |
| 75 | 74 | adantl 277 |
. . . . . . . . . . . . . . . . . . . . 21
  USHGraph
   iEdg    
       |
| 76 | 75 | adantld 278 |
. . . . . . . . . . . . . . . . . . . 20
  USHGraph
   iEdg   iEdg     
       |
| 77 | 76 | imp 124 |
. . . . . . . . . . . . . . . . . . 19
   USHGraph   iEdg   iEdg             |
| 78 | 68, 77 | jca 306 |
. . . . . . . . . . . . . . . . . 18
   USHGraph   iEdg   iEdg       
       |
| 79 | 78, 32 | sylibr 134 |
. . . . . . . . . . . . . . . . 17
   USHGraph   iEdg   iEdg       
       |
| 80 | 69 | eqeq1i 2217 |
. . . . . . . . . . . . . . . . . . . 20
  iEdg           |
| 81 | 80 | biimpi 120 |
. . . . . . . . . . . . . . . . . . 19
  iEdg           |
| 82 | 81 | adantl 277 |
. . . . . . . . . . . . . . . . . 18
  iEdg   iEdg     
      |
| 83 | 82 | adantl 277 |
. . . . . . . . . . . . . . . . 17
   USHGraph   iEdg   iEdg             |
| 84 | 79, 83 | jca 306 |
. . . . . . . . . . . . . . . 16
   USHGraph   iEdg   iEdg                     |
| 85 | 84 | ex 115 |
. . . . . . . . . . . . . . 15
  USHGraph
   iEdg   iEdg     
 
             |
| 86 | 85 | reximdv2 2609 |
. . . . . . . . . . . . . 14
  USHGraph
  
iEdg    iEdg      
            |
| 87 | 86 | ex 115 |
. . . . . . . . . . . . 13
 USHGraph 
 
iEdg    iEdg     
              |
| 88 | 87 | com23 78 |
. . . . . . . . . . . 12
 USHGraph   iEdg    iEdg       
             |
| 89 | 63, 88 | sylbid 150 |
. . . . . . . . . . 11
 USHGraph  iEdg    
             |
| 90 | 48, 89 | sylbid 150 |
. . . . . . . . . 10
 USHGraph 

 
             |
| 91 | 90 | impd 254 |
. . . . . . . . 9
 USHGraph     
            |
| 92 | 91 | adantr 276 |
. . . . . . . 8
  USHGraph
  

 
            |
| 93 | 60, 92 | impbid 129 |
. . . . . . 7
  USHGraph
  
         

    |
| 94 | | vex 2782 |
. . . . . . . 8
 |
| 95 | | eqeq2 2219 |
. . . . . . . . 9
     
       |
| 96 | 95 | rexbidv 2511 |
. . . . . . . 8
  
         
 
            |
| 97 | 94, 96 | elab 2927 |
. . . . . . 7
   
           
           |
| 98 | | eleq2 2273 |
. . . . . . . 8
 
   |
| 99 | | ushgredgedg.b |
. . . . . . . 8

  |
| 100 | 98, 99 | elrab2 2942 |
. . . . . . 7


   |
| 101 | 93, 97, 100 | 3bitr4g 223 |
. . . . . 6
  USHGraph
    
         
   |
| 102 | 101 | eqrdv 2207 |
. . . . 5
  USHGraph
   
            |
| 103 | 29, 102 | eqtrd 2242 |
. . . 4
  USHGraph
             |
| 104 | 103 | eqcomd 2215 |
. . 3
  USHGraph
    
        |
| 105 | 20, 10, 104 | f1oeq123d 5542 |
. 2
  USHGraph
       
        
          
         |
| 106 | 7, 105 | mpbird 167 |
1
  USHGraph
       |