| Step | Hyp | Ref
| Expression |
| 1 | | eqid 2209 |
. . . . 5
Vtx  Vtx   |
| 2 | | ushgredgedgloop.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 | | ushgredgedgloop.f |
. . . . 5
       |
| 9 | | ushgredgedgloop.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 |
. . . . . . 7
       Vtx  
       Vtx      |
| 15 | 3, 14 | syl 14 |
. . . . . 6
 USHGraph       Vtx      |
| 16 | 5 | a1i 9 |
. . . . . 6
 USHGraph           |
| 17 | 15, 16 | feqresmpt 5661 |
. . . . 5
 USHGraph  
                        |
| 18 | 17 | adantr 276 |
. . . 4
  USHGraph
                   
       |
| 19 | 13, 18 | eqtr4d 2245 |
. . 3
  USHGraph
  
          |
| 20 | | ushgruhgr 15845 |
. . . . . . . 8
 USHGraph UHGraph |
| 21 | | eqid 2209 |
. . . . . . . . 9
iEdg  iEdg   |
| 22 | 21 | uhgrfun 15842 |
. . . . . . . 8
 UHGraph
iEdg    |
| 23 | 20, 22 | syl 14 |
. . . . . . 7
 USHGraph
iEdg    |
| 24 | 2 | funeqi 5315 |
. . . . . . 7
 iEdg    |
| 25 | 23, 24 | sylibr 134 |
. . . . . 6
 USHGraph
  |
| 26 | 25 | adantr 276 |
. . . . 5
  USHGraph
   |
| 27 | | dfimafn 5655 |
. . . . 5
                         
              |
| 28 | 26, 5, 27 | sylancl 413 |
. . . 4
  USHGraph
               
              |
| 29 | | fveqeq2 5612 |
. . . . . . . . . 10
                 |
| 30 | 29 | elrab 2939 |
. . . . . . . . 9
                   |
| 31 | | simpl 109 |
. . . . . . . . . . . . . . 15
           |
| 32 | | fvelrn 5739 |
. . . . . . . . . . . . . . . 16
         |
| 33 | 2 | eqcomi 2213 |
. . . . . . . . . . . . . . . . 17
iEdg   |
| 34 | 33 | rneqi 4928 |
. . . . . . . . . . . . . . . 16
iEdg   |
| 35 | 32, 34 | eleqtrrdi 2303 |
. . . . . . . . . . . . . . 15
       iEdg    |
| 36 | 26, 31, 35 | syl2an 289 |
. . . . . . . . . . . . . 14
   USHGraph               iEdg    |
| 37 | 36 | 3adant3 1022 |
. . . . . . . . . . . . 13
   USHGraph                   iEdg    |
| 38 | | eleq1 2272 |
. . . . . . . . . . . . . . 15
      iEdg 
    iEdg     |
| 39 | 38 | eqcoms 2212 |
. . . . . . . . . . . . . 14
      iEdg 
    iEdg     |
| 40 | 39 | 3ad2ant3 1025 |
. . . . . . . . . . . . 13
   USHGraph                iEdg 
    iEdg     |
| 41 | 37, 40 | mpbird 167 |
. . . . . . . . . . . 12
   USHGraph               iEdg    |
| 42 | | ushgredgedgloop.e |
. . . . . . . . . . . . . . . 16
Edg   |
| 43 | | edgvalg 15825 |
. . . . . . . . . . . . . . . 16
 USHGraph Edg  iEdg    |
| 44 | 42, 43 | eqtrid 2254 |
. . . . . . . . . . . . . . 15
 USHGraph iEdg    |
| 45 | 44 | eleq2d 2279 |
. . . . . . . . . . . . . 14
 USHGraph  iEdg     |
| 46 | 45 | adantr 276 |
. . . . . . . . . . . . 13
  USHGraph
 
iEdg     |
| 47 | 46 | 3ad2ant1 1023 |
. . . . . . . . . . . 12
   USHGraph                iEdg     |
| 48 | 41, 47 | mpbird 167 |
. . . . . . . . . . 11
   USHGraph                 |
| 49 | | eqeq1 2216 |
. . . . . . . . . . . . . . 15
                 |
| 50 | 49 | biimpcd 159 |
. . . . . . . . . . . . . 14
                 |
| 51 | 50 | adantl 277 |
. . . . . . . . . . . . 13
                   |
| 52 | 51 | a1i 9 |
. . . . . . . . . . . 12
  USHGraph
                     |
| 53 | 52 | 3imp 1198 |
. . . . . . . . . . 11
   USHGraph                   |
| 54 | 48, 53 | jca 306 |
. . . . . . . . . 10
   USHGraph               
     |
| 55 | 54 | 3exp 1207 |
. . . . . . . . 9
  USHGraph
               
       |
| 56 | 30, 55 | biimtrid 152 |
. . . . . . . 8
  USHGraph
         
     
       |
| 57 | 56 | rexlimdv 2627 |
. . . . . . 7
  USHGraph
  
       
           |
| 58 | 23 | funfnd 5325 |
. . . . . . . . . . . 12
 USHGraph iEdg  iEdg    |
| 59 | | fvelrnb 5654 |
. . . . . . . . . . . 12
 iEdg  iEdg   iEdg 
 iEdg    iEdg        |
| 60 | 58, 59 | syl 14 |
. . . . . . . . . . 11
 USHGraph  iEdg   iEdg    iEdg        |
| 61 | 33 | dmeqi 4901 |
. . . . . . . . . . . . . . . . . . . . . 22
iEdg   |
| 62 | 61 | eleq2i 2276 |
. . . . . . . . . . . . . . . . . . . . 21
 iEdg 
  |
| 63 | 62 | biimpi 120 |
. . . . . . . . . . . . . . . . . . . 20
 iEdg    |
| 64 | 63 | adantr 276 |
. . . . . . . . . . . . . . . . . . 19
  iEdg   iEdg     
  |
| 65 | 64 | adantl 277 |
. . . . . . . . . . . . . . . . . 18
   USHGraph     iEdg   iEdg         |
| 66 | 33 | fveq1i 5604 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
 iEdg          |
| 67 | 66 | eqeq2i 2220 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
  iEdg           |
| 68 | 67 | biimpi 120 |
. . . . . . . . . . . . . . . . . . . . . . . 24
  iEdg    
      |
| 69 | 68 | eqcoms 2212 |
. . . . . . . . . . . . . . . . . . . . . . 23
  iEdg           |
| 70 | 69 | eqeq1d 2218 |
. . . . . . . . . . . . . . . . . . . . . 22
  iEdg       
         |
| 71 | 70 | biimpcd 159 |
. . . . . . . . . . . . . . . . . . . . 21
     iEdg              |
| 72 | 71 | adantl 277 |
. . . . . . . . . . . . . . . . . . . 20
  USHGraph
     iEdg              |
| 73 | 72 | adantld 278 |
. . . . . . . . . . . . . . . . . . 19
  USHGraph
     iEdg   iEdg     
         |
| 74 | 73 | imp 124 |
. . . . . . . . . . . . . . . . . 18
   USHGraph     iEdg   iEdg               |
| 75 | 65, 74 | jca 306 |
. . . . . . . . . . . . . . . . 17
   USHGraph     iEdg   iEdg                 |
| 76 | 75, 30 | sylibr 134 |
. . . . . . . . . . . . . . . 16
   USHGraph     iEdg   iEdg                 |
| 77 | 66 | eqeq1i 2217 |
. . . . . . . . . . . . . . . . . . 19
  iEdg           |
| 78 | 77 | biimpi 120 |
. . . . . . . . . . . . . . . . . 18
  iEdg           |
| 79 | 78 | adantl 277 |
. . . . . . . . . . . . . . . . 17
  iEdg   iEdg     
      |
| 80 | 79 | adantl 277 |
. . . . . . . . . . . . . . . 16
   USHGraph     iEdg   iEdg             |
| 81 | 76, 80 | jca 306 |
. . . . . . . . . . . . . . 15
   USHGraph     iEdg   iEdg        
              |
| 82 | 81 | ex 115 |
. . . . . . . . . . . . . 14
  USHGraph
     iEdg   iEdg     
 
               |
| 83 | 82 | reximdv2 2609 |
. . . . . . . . . . . . 13
  USHGraph
     iEdg    iEdg     
       
       |
| 84 | 83 | ex 115 |
. . . . . . . . . . . 12
 USHGraph      iEdg    iEdg                      |
| 85 | 84 | com23 78 |
. . . . . . . . . . 11
 USHGraph   iEdg    iEdg       
 
               |
| 86 | 60, 85 | sylbid 150 |
. . . . . . . . . 10
 USHGraph  iEdg    
 
               |
| 87 | 45, 86 | sylbid 150 |
. . . . . . . . 9
 USHGraph 
           
        |
| 88 | 87 | impd 254 |
. . . . . . . 8
 USHGraph                      |
| 89 | 88 | adantr 276 |
. . . . . . 7
  USHGraph
  
    
              |
| 90 | 57, 89 | impbid 129 |
. . . . . 6
  USHGraph
  
       
    
      |
| 91 | | vex 2782 |
. . . . . . 7
 |
| 92 | | eqeq2 2219 |
. . . . . . . 8
     
       |
| 93 | 92 | rexbidv 2511 |
. . . . . . 7
  
       
    
       
       |
| 94 | 91, 93 | elab 2927 |
. . . . . 6
               
 
             |
| 95 | | eqeq1 2216 |
. . . . . . 7
         |
| 96 | | ushgredgedgloop.b |
. . . . . . 7

    |
| 97 | 95, 96 | elrab2 2942 |
. . . . . 6


     |
| 98 | 90, 94, 97 | 3bitr4g 223 |
. . . . 5
  USHGraph
    
           
   |
| 99 | 98 | eqrdv 2207 |
. . . 4
  USHGraph
   
              |
| 100 | 28, 99 | eqtr2d 2243 |
. . 3
  USHGraph
    
          |
| 101 | 19, 10, 100 | f1oeq123d 5542 |
. 2
  USHGraph
       
          
                        |
| 102 | 7, 101 | mpbird 167 |
1
  USHGraph
       |