| Step | Hyp | Ref
| Expression |
| 1 | | frgr3v.v |
. . . . . 6
Vtx   |
| 2 | | frgr3v.e |
. . . . . 6
Edg   |
| 3 | 1, 2 | frgrusgrfrcond 27123 |
. . . . 5
 FriendGraph  USGraph 

                  |
| 4 | 3 | a1i 11 |
. . . 4
        
 
 
USGraph  
FriendGraph  USGraph  
                   |
| 5 | | id 22 |
. . . . . . . 8
   
       |
| 6 | | difeq1 3721 |
. . . . . . . . 9
   
        
      |
| 7 | | reueq1 3140 |
. . . . . . . . 9
   
                             |
| 8 | 6, 7 | raleqbidv 3152 |
. . . . . . . 8
   
                                             |
| 9 | 5, 8 | raleqbidv 3152 |
. . . . . . 7
   
                     
       
       
 
            |
| 10 | 9 | anbi2d 740 |
. . . . . 6
   
   USGraph  
                 USGraph   
       
       
 
             |
| 11 | 10 | baibd 948 |
. . . . 5
     
USGraph   USGraph  
                  
       
       
 
            |
| 12 | 11 | adantl 482 |
. . . 4
        
 
 
USGraph    USGraph 

               
          
       
 
            |
| 13 | 4, 12 | bitrd 268 |
. . 3
        
 
 
USGraph  
FriendGraph   
       
       
 
            |
| 14 | | sneq 4187 |
. . . . . . . 8
       |
| 15 | 14 | difeq2d 3728 |
. . . . . . 7
     
             |
| 16 | | preq2 4269 |
. . . . . . . . . 10
         |
| 17 | 16 | preq1d 4274 |
. . . . . . . . 9
              
      |
| 18 | 17 | sseq1d 3632 |
. . . . . . . 8
                   
   |
| 19 | 18 | reubidv 3126 |
. . . . . . 7
  
               
 
        
   |
| 20 | 15, 19 | raleqbidv 3152 |
. . . . . 6
  
    
                                             |
| 21 | | sneq 4187 |
. . . . . . . 8
       |
| 22 | 21 | difeq2d 3728 |
. . . . . . 7
     
             |
| 23 | | preq2 4269 |
. . . . . . . . . 10
         |
| 24 | 23 | preq1d 4274 |
. . . . . . . . 9
              
      |
| 25 | 24 | sseq1d 3632 |
. . . . . . . 8
                   
   |
| 26 | 25 | reubidv 3126 |
. . . . . . 7
  
               
 
        
   |
| 27 | 22, 26 | raleqbidv 3152 |
. . . . . 6
  
    
                                             |
| 28 | | sneq 4187 |
. . . . . . . 8
       |
| 29 | 28 | difeq2d 3728 |
. . . . . . 7
     
             |
| 30 | | preq2 4269 |
. . . . . . . . . 10
         |
| 31 | 30 | preq1d 4274 |
. . . . . . . . 9
              
      |
| 32 | 31 | sseq1d 3632 |
. . . . . . . 8
                   
   |
| 33 | 32 | reubidv 3126 |
. . . . . . 7
  
               
 
        
   |
| 34 | 29, 33 | raleqbidv 3152 |
. . . . . 6
  
    
                                             |
| 35 | 20, 27, 34 | raltpg 4236 |
. . . . 5
 
            
       
 
                                                                                      |
| 36 | 35 | ad2antrr 762 |
. . . 4
        
 
 
USGraph   
     
    
                       
       
 
        
     
                                              |
| 37 | | tprot 4284 |
. . . . . . . . . 10
         |
| 38 | 37 | a1i 11 |
. . . . . . . . 9
             |
| 39 | 38 | difeq1d 3727 |
. . . . . . . 8
       
             |
| 40 | | necom 2847 |
. . . . . . . . . . . 12

  |
| 41 | 40 | biimpi 206 |
. . . . . . . . . . 11
   |
| 42 | | necom 2847 |
. . . . . . . . . . . 12

  |
| 43 | 42 | biimpi 206 |
. . . . . . . . . . 11
   |
| 44 | 41, 43 | anim12i 590 |
. . . . . . . . . 10
   
   |
| 45 | 44 | 3adant3 1081 |
. . . . . . . . 9
       |
| 46 | | diftpsn3 4332 |
. . . . . . . . 9
      
         |
| 47 | 45, 46 | syl 17 |
. . . . . . . 8
       
    
   |
| 48 | 39, 47 | eqtrd 2656 |
. . . . . . 7
       
    
   |
| 49 | 48 | raleqdv 3144 |
. . . . . 6
    
    
                                        |
| 50 | | tprot 4284 |
. . . . . . . . . . 11
         |
| 51 | 50 | eqcomi 2631 |
. . . . . . . . . 10
         |
| 52 | 51 | a1i 11 |
. . . . . . . . 9
             |
| 53 | 52 | difeq1d 3727 |
. . . . . . . 8
       
             |
| 54 | | id 22 |
. . . . . . . . . . 11
   |
| 55 | | necom 2847 |
. . . . . . . . . . . 12

  |
| 56 | 55 | biimpi 206 |
. . . . . . . . . . 11
   |
| 57 | 54, 56 | anim12ci 591 |
. . . . . . . . . 10
   
   |
| 58 | 57 | 3adant2 1080 |
. . . . . . . . 9
       |
| 59 | | diftpsn3 4332 |
. . . . . . . . 9
      
         |
| 60 | 58, 59 | syl 17 |
. . . . . . . 8
       
    
   |
| 61 | 53, 60 | eqtrd 2656 |
. . . . . . 7
       
    
   |
| 62 | 61 | raleqdv 3144 |
. . . . . 6
    
    
                                        |
| 63 | | diftpsn3 4332 |
. . . . . . . 8
      
         |
| 64 | 63 | 3adant1 1079 |
. . . . . . 7
       
    
   |
| 65 | 64 | raleqdv 3144 |
. . . . . 6
    
    
                                        |
| 66 | 49, 62, 65 | 3anbi123d 1399 |
. . . . 5
         
       
 
        
     
                                                   
 
        
                     
  
        
        |
| 67 | 66 | ad2antlr 763 |
. . . 4
        
 
 
USGraph        
       
 
        
     
                                                   
 
        
                     
  
        
        |
| 68 | | preq2 4269 |
. . . . . . . . . . 11
         |
| 69 | 68 | preq2d 4275 |
. . . . . . . . . 10
              
      |
| 70 | 69 | sseq1d 3632 |
. . . . . . . . 9
      
                |
| 71 | 70 | reubidv 3126 |
. . . . . . . 8
  
        
      
 
            |
| 72 | | preq2 4269 |
. . . . . . . . . . 11
         |
| 73 | 72 | preq2d 4275 |
. . . . . . . . . 10
              
      |
| 74 | 73 | sseq1d 3632 |
. . . . . . . . 9
      
                |
| 75 | 74 | reubidv 3126 |
. . . . . . . 8
  
        
      
 
            |
| 76 | 71, 75 | ralprg 4234 |
. . . . . . 7
 
         
 
        
 
        
                 
    |
| 77 | 76 | 3adant1 1079 |
. . . . . 6
 
         
 
        
 
        
                 
    |
| 78 | 72 | preq2d 4275 |
. . . . . . . . . . 11
              
      |
| 79 | 78 | sseq1d 3632 |
. . . . . . . . . 10
      
                |
| 80 | 79 | reubidv 3126 |
. . . . . . . . 9
  
        
      
 
            |
| 81 | | preq2 4269 |
. . . . . . . . . . . 12
         |
| 82 | 81 | preq2d 4275 |
. . . . . . . . . . 11
              
      |
| 83 | 82 | sseq1d 3632 |
. . . . . . . . . 10
      
                |
| 84 | 83 | reubidv 3126 |
. . . . . . . . 9
  
        
      
 
            |
| 85 | 80, 84 | ralprg 4234 |
. . . . . . . 8
 
         
 
        
 
        
                 
    |
| 86 | 85 | ancoms 469 |
. . . . . . 7
 
         
 
        
 
        
                 
    |
| 87 | 86 | 3adant2 1080 |
. . . . . 6
 
         
 
        
 
        
                 
    |
| 88 | 81 | preq2d 4275 |
. . . . . . . . . 10
              
      |
| 89 | 88 | sseq1d 3632 |
. . . . . . . . 9
      
                |
| 90 | 89 | reubidv 3126 |
. . . . . . . 8
  
        
      
 
            |
| 91 | 68 | preq2d 4275 |
. . . . . . . . . 10
              
      |
| 92 | 91 | sseq1d 3632 |
. . . . . . . . 9
      
                |
| 93 | 92 | reubidv 3126 |
. . . . . . . 8
  
        
      
 
            |
| 94 | 90, 93 | ralprg 4234 |
. . . . . . 7
 
         
 
        
 
        
                 
    |
| 95 | 94 | 3adant3 1081 |
. . . . . 6
 
         
 
        
 
        
                 
    |
| 96 | 77, 87, 95 | 3anbi123d 1399 |
. . . . 5
 
          
 
        
                     
  
        
    
  
        
                 
               

        
      
        
                 
     |
| 97 | 96 | ad2antrr 762 |
. . . 4
        
 
 
USGraph           
 
        
                     
  
        
    
  
        
                 
               

        
      
        
                 
     |
| 98 | 36, 67, 97 | 3bitrd 294 |
. . 3
        
 
 
USGraph   
     
    
                                 

        
      
        
                 
               

        
         |
| 99 | 1, 2 | frgr3vlem2 27138 |
. . . . . . 7
  


     
 
USGraph               
  

        |
| 100 | 99 | imp 445 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 101 | | simpll1 1100 |
. . . . . . . 8
        
 
 
USGraph    |
| 102 | | simpll3 1102 |
. . . . . . . 8
        
 
 
USGraph    |
| 103 | | simpll2 1101 |
. . . . . . . 8
        
 
 
USGraph    |
| 104 | 101, 102,
103 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph  
   |
| 105 | | simplr2 1104 |
. . . . . . . 8
        
 
 
USGraph    |
| 106 | | simplr1 1103 |
. . . . . . . 8
        
 
 
USGraph    |
| 107 | 58 | simpld 475 |
. . . . . . . . 9
     |
| 108 | 107 | ad2antlr 763 |
. . . . . . . 8
        
 
 
USGraph    |
| 109 | 105, 106,
108 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph      |
| 110 | | tpcomb 4286 |
. . . . . . . . . 10
         |
| 111 | 5, 110 | syl6eq 2672 |
. . . . . . . . 9
   
       |
| 112 | 111 | anim1i 592 |
. . . . . . . 8
     
USGraph   
 
USGraph   |
| 113 | 112 | adantl 482 |
. . . . . . 7
        
 
 
USGraph  
   
USGraph   |
| 114 | | reueq1 3140 |
. . . . . . . . 9
    
 
 
          
      
 
            |
| 115 | 110, 114 | mp1i 13 |
. . . . . . . 8
        
 
 
USGraph   
        
      
 
            |
| 116 | 1, 2 | frgr3vlem2 27138 |
. . . . . . . . 9
  


     
 
USGraph               
  

        |
| 117 | 116 | imp 445 |
. . . . . . . 8
        
 
 
USGraph   
        
       
  
    |
| 118 | 115, 117 | bitrd 268 |
. . . . . . 7
        
 
 
USGraph   
        
       
  
    |
| 119 | 104, 109,
113, 118 | syl21anc 1325 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 120 | 100, 119 | anbi12d 747 |
. . . . 5
        
 
 
USGraph                 

        
    
    
   
  

        |
| 121 | 103, 102,
101 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph  
   |
| 122 | | simplr3 1105 |
. . . . . . . 8
        
 
 
USGraph    |
| 123 | 106 | necomd 2849 |
. . . . . . . 8
        
 
 
USGraph    |
| 124 | 105 | necomd 2849 |
. . . . . . . 8
        
 
 
USGraph    |
| 125 | 122, 123,
124 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph      |
| 126 | 37 | eqeq2i 2634 |
. . . . . . . . . 10
   
   
   |
| 127 | 126 | biimpi 206 |
. . . . . . . . 9
   
       |
| 128 | 127 | anim1i 592 |
. . . . . . . 8
     
USGraph   
 
USGraph   |
| 129 | 128 | adantl 482 |
. . . . . . 7
        
 
 
USGraph  
   
USGraph   |
| 130 | | reueq1 3140 |
. . . . . . . . 9
    
 
 
          
      
 
            |
| 131 | 37, 130 | mp1i 13 |
. . . . . . . 8
        
 
 
USGraph   
        
      
 
            |
| 132 | 1, 2 | frgr3vlem2 27138 |
. . . . . . . . 9
  


     
 
USGraph               
  

        |
| 133 | 132 | imp 445 |
. . . . . . . 8
        
 
 
USGraph   
        
       
  
    |
| 134 | 131, 133 | bitrd 268 |
. . . . . . 7
        
 
 
USGraph   
        
       
  
    |
| 135 | 121, 125,
129, 134 | syl21anc 1325 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 136 | 103, 101,
102 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph  
   |
| 137 | 123, 122,
105 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph      |
| 138 | | tpcoma 4285 |
. . . . . . . . . . 11
         |
| 139 | 138 | eqeq2i 2634 |
. . . . . . . . . 10
   
   
   |
| 140 | 139 | biimpi 206 |
. . . . . . . . 9
   
       |
| 141 | 140 | anim1i 592 |
. . . . . . . 8
     
USGraph   
 
USGraph   |
| 142 | 141 | adantl 482 |
. . . . . . 7
        
 
 
USGraph  
   
USGraph   |
| 143 | | reueq1 3140 |
. . . . . . . . 9
    
 
 
          
      
 
            |
| 144 | 138, 143 | mp1i 13 |
. . . . . . . 8
        
 
 
USGraph   
        
      
 
            |
| 145 | 1, 2 | frgr3vlem2 27138 |
. . . . . . . . 9
  


     
 
USGraph               
  

        |
| 146 | 145 | imp 445 |
. . . . . . . 8
        
 
 
USGraph   
        
       
  
    |
| 147 | 144, 146 | bitrd 268 |
. . . . . . 7
        
 
 
USGraph   
        
       
  
    |
| 148 | 136, 137,
142, 147 | syl21anc 1325 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 149 | 135, 148 | anbi12d 747 |
. . . . 5
        
 
 
USGraph                 

        
    
    
   
  

        |
| 150 | 102, 101,
103 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph  
   |
| 151 | 124, 108,
106 | 3jca 1242 |
. . . . . . 7
        
 
 
USGraph      |
| 152 | 51 | eqeq2i 2634 |
. . . . . . . . . 10
   
   
   |
| 153 | 152 | biimpi 206 |
. . . . . . . . 9
   
       |
| 154 | 153 | anim1i 592 |
. . . . . . . 8
     
USGraph   
 
USGraph   |
| 155 | 154 | adantl 482 |
. . . . . . 7
        
 
 
USGraph  
   
USGraph   |
| 156 | | reueq1 3140 |
. . . . . . . . 9
    
 
 
          
      
 
            |
| 157 | 51, 156 | mp1i 13 |
. . . . . . . 8
        
 
 
USGraph   
        
      
 
            |
| 158 | 1, 2 | frgr3vlem2 27138 |
. . . . . . . . 9
  


     
 
USGraph               
  

        |
| 159 | 158 | imp 445 |
. . . . . . . 8
        
 
 
USGraph   
        
       
  
    |
| 160 | 157, 159 | bitrd 268 |
. . . . . . 7
        
 
 
USGraph   
        
       
  
    |
| 161 | 150, 151,
155, 160 | syl21anc 1325 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 162 | | 3anrev 1049 |
. . . . . . . . 9
 
 
   |
| 163 | 162 | biimpi 206 |
. . . . . . . 8
 
 
   |
| 164 | 55, 42, 40 | 3anbi123i 1251 |
. . . . . . . . . 10
  

   |
| 165 | 164 | biimpi 206 |
. . . . . . . . 9
       |
| 166 | 165 | 3com13 1270 |
. . . . . . . 8
       |
| 167 | 163, 166 | anim12i 590 |
. . . . . . 7
  


   


    |
| 168 | | tpcoma 4285 |
. . . . . . . . . . 11
         |
| 169 | 37, 168 | eqtri 2644 |
. . . . . . . . . 10
         |
| 170 | 169 | eqeq2i 2634 |
. . . . . . . . 9
   
   
   |
| 171 | 170 | biimpi 206 |
. . . . . . . 8
   
       |
| 172 | 171 | anim1i 592 |
. . . . . . 7
     
USGraph   
 
USGraph   |
| 173 | | reueq1 3140 |
. . . . . . . . 9
    
 
 
          
      
 
            |
| 174 | 169, 173 | mp1i 13 |
. . . . . . . 8
        
 
 
USGraph   
        
      
 
            |
| 175 | 1, 2 | frgr3vlem2 27138 |
. . . . . . . . 9
  


     
 
USGraph               
  

        |
| 176 | 175 | imp 445 |
. . . . . . . 8
        
 
 
USGraph   
        
       
  
    |
| 177 | 174, 176 | bitrd 268 |
. . . . . . 7
        
 
 
USGraph   
        
       
  
    |
| 178 | 167, 172,
177 | syl2an 494 |
. . . . . 6
        
 
 
USGraph   
        
       
  
    |
| 179 | 161, 178 | anbi12d 747 |
. . . . 5
        
 
 
USGraph                 

        
    
    
   
  

        |
| 180 | 120, 149,
179 | 3anbi123d 1399 |
. . . 4
        
 
 
USGraph                  

        
      
        
                 
               

        
     
     
  
    
  
 
    
   
  

         
  
    
  
      |
| 181 | | prcom 4267 |
. . . . . . . . . 10
    
  |
| 182 | 181 | eleq1i 2692 |
. . . . . . . . 9
   
  
  |
| 183 | 182 | anbi2i 730 |
. . . . . . . 8
    
   
  

      |
| 184 | 183 | anbi2i 730 |
. . . . . . 7
     
  
    
  
      
   
  

       |
| 185 | | anandir 872 |
. . . . . . 7
     
  
   
     
  
    
  
    |
| 186 | 184, 185 | bitr4i 267 |
. . . . . 6
     
  
    
  
      
   
      |
| 187 | | prcom 4267 |
. . . . . . . . . 10
    
  |
| 188 | 187 | eleq1i 2692 |
. . . . . . . . 9
   
  
  |
| 189 | 188 | anbi2i 730 |
. . . . . . . 8
    
   
  

      |
| 190 | 189 | anbi2i 730 |
. . . . . . 7
     
  
    
  
      
   
  

       |
| 191 | | anandir 872 |
. . . . . . 7
     
  
   
     
  
    
  
    |
| 192 | 190, 191 | bitr4i 267 |
. . . . . 6
     
  
    
  
      
   
      |
| 193 | | prcom 4267 |
. . . . . . . . . 10
    
  |
| 194 | 193 | eleq1i 2692 |
. . . . . . . . 9
   
  
  |
| 195 | 194 | anbi2i 730 |
. . . . . . . 8
    
   
  

      |
| 196 | 195 | anbi2i 730 |
. . . . . . 7
     
  
    
  
      
   
  

       |
| 197 | | anandir 872 |
. . . . . . 7
     
  
   
     
  
    
  
    |
| 198 | 196, 197 | bitr4i 267 |
. . . . . 6
     
  
    
  
      
   
      |
| 199 | 186, 192,
198 | 3anbi123i 1251 |
. . . . 5
         
    
  
 
    
   
  

         
  
    
  
  
     
  
   
        
   
        
   
    |
| 200 | | 3anrot 1043 |
. . . . . . 7
    
  
          
      |
| 201 | | df-3an 1039 |
. . . . . . 7
    
  
        
   
      |
| 202 | | prcom 4267 |
. . . . . . . . 9
    
  |
| 203 | 202 | eleq1i 2692 |
. . . . . . . 8
   
  
  |
| 204 | | prcom 4267 |
. . . . . . . . 9
    
  |
| 205 | 204 | eleq1i 2692 |
. . . . . . . 8
   
  
  |
| 206 | | biid 251 |
. . . . . . . 8
   
  
  |
| 207 | 203, 205,
206 | 3anbi123i 1251 |
. . . . . . 7
    
  
          
      |
| 208 | 200, 201,
207 | 3bitr3i 290 |
. . . . . 6
     
  
   
    
  
      |
| 209 | | df-3an 1039 |
. . . . . . 7
    
  
        
   
      |
| 210 | | biid 251 |
. . . . . . . 8
   
  
  |
| 211 | | prcom 4267 |
. . . . . . . . 9
    
  |
| 212 | 211 | eleq1i 2692 |
. . . . . . . 8
   
  
  |
| 213 | 210, 205,
212 | 3anbi123i 1251 |
. . . . . . 7
    
  
          
      |
| 214 | 209, 213 | bitr3i 266 |
. . . . . 6
     
  
   
    
  
      |
| 215 | | df-3an 1039 |
. . . . . . 7
    
  
        
   
      |
| 216 | | 3anrot 1043 |
. . . . . . . 8
    
  
          
      |
| 217 | | 3anrot 1043 |
. . . . . . . 8
    
  
          
      |
| 218 | | biid 251 |
. . . . . . . . 9
   
  
  |
| 219 | 203, 218,
212 | 3anbi123i 1251 |
. . . . . . . 8
    
  
          
      |
| 220 | 216, 217,
219 | 3bitri 286 |
. . . . . . 7
    
  
          
      |
| 221 | 215, 220 | bitr3i 266 |
. . . . . 6
     
  
   
    
  
      |
| 222 | 208, 214,
221 | 3anbi123i 1251 |
. . . . 5
         
   
        
   
        
   
      
     
    
  
       
     
    |
| 223 | | df-3an 1039 |
. . . . . 6
     
  
       
     
    
  
    
     
  
       
     
 
  

     
    |
| 224 | | anabs1 850 |
. . . . . 6
         
       
     
 
  

     
      
     
    
  
       |
| 225 | | anidm 676 |
. . . . . 6
     
  
       
     
        
      |
| 226 | 223, 224,
225 | 3bitri 286 |
. . . . 5
     
  
       
     
    
  
    
  

     
   |
| 227 | 199, 222,
226 | 3bitri 286 |
. . . 4
         
    
  
 
    
   
  

         
  
    
  
  
  

     
   |
| 228 | 180, 227 | syl6bb 276 |
. . 3
        
 
 
USGraph                  

        
      
        
                 
               

        
     
  

     
    |
| 229 | 13, 98, 228 | 3bitrd 294 |
. 2
        
 
 
USGraph  
FriendGraph       
       |
| 230 | 229 | ex 450 |
1
  


     
 
USGraph  FriendGraph    
     
     |