| Step | Hyp | Ref
| Expression |
| 1 | | 0z 9490 |
. . . . . . . 8
 |
| 2 | | 3z 9508 |
. . . . . . . 8
 |
| 3 | | fzfig 10693 |
. . . . . . . 8
 
       |
| 4 | 1, 2, 3 | mp2an 426 |
. . . . . . 7
     |
| 5 | 4 | elexi 2815 |
. . . . . 6
     |
| 6 | | 0nn0 9417 |
. . . . . . . . . . 11
 |
| 7 | | 1nn0 9418 |
. . . . . . . . . . 11
 |
| 8 | | prexg 4301 |
. . . . . . . . . . 11
 
      |
| 9 | 6, 7, 8 | mp2an 426 |
. . . . . . . . . 10
    |
| 10 | 9 | a1i 9 |
. . . . . . . . 9
     |
| 11 | | 2nn0 9419 |
. . . . . . . . . . 11
 |
| 12 | | prexg 4301 |
. . . . . . . . . . 11
 
      |
| 13 | 6, 11, 12 | mp2an 426 |
. . . . . . . . . 10
    |
| 14 | 13 | a1i 9 |
. . . . . . . . 9
     |
| 15 | | 3nn0 9420 |
. . . . . . . . . . 11
 |
| 16 | | prexg 4301 |
. . . . . . . . . . 11
 
      |
| 17 | 6, 15, 16 | mp2an 426 |
. . . . . . . . . 10
    |
| 18 | 17 | a1i 9 |
. . . . . . . . 9
     |
| 19 | | prexg 4301 |
. . . . . . . . . . 11
 
      |
| 20 | 7, 11, 19 | mp2an 426 |
. . . . . . . . . 10
    |
| 21 | 20 | a1i 9 |
. . . . . . . . 9
     |
| 22 | | prexg 4301 |
. . . . . . . . . . 11
 
      |
| 23 | 11, 15, 22 | mp2an 426 |
. . . . . . . . . 10
    |
| 24 | 23 | a1i 9 |
. . . . . . . . 9
     |
| 25 | 10, 14, 18, 21, 21, 24 | s6cld 11367 |
. . . . . . . 8
                      Word   |
| 26 | 25 | mptru 1406 |
. . . . . . 7
                      Word  |
| 27 | 26 | elexi 2815 |
. . . . . 6
                       |
| 28 | 5, 27 | opvtxfvi 15897 |
. . . . 5
Vtx                                    |
| 29 | 28 | eqcomi 2235 |
. . . 4
    Vtx                                |
| 30 | | nn0fz0 10354 |
. . . . . 6

      |
| 31 | 15, 30 | mpbi 145 |
. . . . 5
     |
| 32 | 31 | a1i 9 |
. . . 4
      |
| 33 | 5, 27 | opiedgfvi 15898 |
. . . . 5
iEdg                                                      |
| 34 | 33 | eqcomi 2235 |
. . . 4
                      iEdg                                |
| 35 | 24 | s1cld 11203 |
. . . . . . 7
       Word   |
| 36 | 35 | mptru 1406 |
. . . . . 6
       Word  |
| 37 | | df-s7 11346 |
. . . . . 6
                                                ++          |
| 38 | | eqid 2231 |
. . . . . . 7
         |
| 39 | | eqid 2231 |
. . . . . . 7
                                                   |
| 40 | | eqid 2231 |
. . . . . . 7
                                                                 |
| 41 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . 6
                        Word
       Word                                                 ++                                Word       
    |
| 42 | 26, 36, 37, 41 | mp3an 1373 |
. . . . 5
                      Word       
   |
| 43 | 42 | a1i 9 |
. . . 4
                      Word            |
| 44 | 10, 14, 18, 21, 21 | s5cld 11366 |
. . . . . . . . . 10
                   Word   |
| 45 | 44 | mptru 1406 |
. . . . . . . . 9
                   Word  |
| 46 | 45 | elexi 2815 |
. . . . . . . 8
                    |
| 47 | 5, 46 | opvtxfvi 15897 |
. . . . . . 7
Vtx                                 |
| 48 | 47 | eqcomi 2235 |
. . . . . 6
    Vtx                             |
| 49 | 5, 46 | opiedgfvi 15898 |
. . . . . . 7
iEdg                                                |
| 50 | 49 | eqcomi 2235 |
. . . . . 6
                   iEdg                             |
| 51 | 24, 24 | s2cld 11363 |
. . . . . . 7
          Word   |
| 52 | 10, 14, 18, 21, 21, 24, 24 | s5s2d 11390 |
. . . . . . 7
                                             ++              |
| 53 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . . 7
                     Word           Word                                              ++                                Word       
    |
| 54 | 44, 51, 52, 53 | syl3anc 1273 |
. . . . . 6
                   Word       
    |
| 55 | 10, 14, 18, 21 | s4cld 11365 |
. . . . . . . . . . 11
                Word   |
| 56 | 55 | mptru 1406 |
. . . . . . . . . 10
                Word  |
| 57 | 56 | elexi 2815 |
. . . . . . . . 9
                 |
| 58 | 5, 57 | opvtxfvi 15897 |
. . . . . . . 8
Vtx                              |
| 59 | 58 | eqcomi 2235 |
. . . . . . 7
    Vtx                          |
| 60 | 5, 57 | opiedgfvi 15898 |
. . . . . . . 8
iEdg                                          |
| 61 | 60 | eqcomi 2235 |
. . . . . . 7
                iEdg                          |
| 62 | 21, 24, 24 | s3cld 11364 |
. . . . . . . 8
             Word   |
| 63 | 10, 14, 18, 21, 21, 24, 24 | s4s3d 11387 |
. . . . . . . 8
                                          ++                 |
| 64 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . . . 8
                  Word              Word                                           ++                                Word       
    |
| 65 | 55, 62, 63, 64 | syl3anc 1273 |
. . . . . . 7
                Word       
    |
| 66 | 10, 14, 18 | s3cld 11364 |
. . . . . . . . . . . 12
             Word   |
| 67 | 66 | mptru 1406 |
. . . . . . . . . . 11
             Word  |
| 68 | 67 | elexi 2815 |
. . . . . . . . . 10
              |
| 69 | 5, 68 | opvtxfvi 15897 |
. . . . . . . . 9
Vtx                           |
| 70 | 69 | eqcomi 2235 |
. . . . . . . 8
    Vtx                       |
| 71 | 5, 68 | opiedgfvi 15898 |
. . . . . . . . 9
iEdg                                    |
| 72 | 71 | eqcomi 2235 |
. . . . . . . 8
             iEdg                       |
| 73 | 21, 21, 24, 24 | s4cld 11365 |
. . . . . . . . 9
                Word   |
| 74 | 10, 14, 18, 21, 21, 24, 24 | s3s4d 11388 |
. . . . . . . . 9
                                       ++                    |
| 75 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . . . . 9
               Word                 Word                                        ++                                Word       
    |
| 76 | 66, 73, 74, 75 | syl3anc 1273 |
. . . . . . . 8
             Word       
    |
| 77 | 10, 14 | s2cld 11363 |
. . . . . . . . . . . . . 14
          Word   |
| 78 | 77 | mptru 1406 |
. . . . . . . . . . . . 13
          Word  |
| 79 | 78 | elexi 2815 |
. . . . . . . . . . . 12
           |
| 80 | 5, 79 | opvtxfvi 15897 |
. . . . . . . . . . 11
Vtx                        |
| 81 | 80 | eqcomi 2235 |
. . . . . . . . . 10
    Vtx                    |
| 82 | 5, 79 | opiedgfvi 15898 |
. . . . . . . . . . 11
iEdg                              |
| 83 | 82 | eqcomi 2235 |
. . . . . . . . . 10
          iEdg                    |
| 84 | 18, 21, 21, 24, 24 | s5cld 11366 |
. . . . . . . . . . 11
                   Word   |
| 85 | 10, 14, 18, 21, 21, 24, 24 | s2s5d 11389 |
. . . . . . . . . . 11
                                    ++
                      |
| 86 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . . . . . . 11
            Word
                   Word                                     ++                                Word       
    |
| 87 | 77, 84, 85, 86 | syl3anc 1273 |
. . . . . . . . . 10
          Word            |
| 88 | 10 | s1cld 11203 |
. . . . . . . . . . . . . . 15
       Word   |
| 89 | 88 | mptru 1406 |
. . . . . . . . . . . . . 14
       Word  |
| 90 | 89 | elexi 2815 |
. . . . . . . . . . . . 13
        |
| 91 | 5, 90 | opvtxfvi 15897 |
. . . . . . . . . . . 12
Vtx                     |
| 92 | 91 | eqcomi 2235 |
. . . . . . . . . . 11
    Vtx                 |
| 93 | 5, 90 | opiedgfvi 15898 |
. . . . . . . . . . . 12
iEdg                        |
| 94 | 93 | eqcomi 2235 |
. . . . . . . . . . 11
       iEdg                 |
| 95 | 14, 18, 21, 21, 24, 24 | s6cld 11367 |
. . . . . . . . . . . 12
                      Word   |
| 96 | 10, 14, 18, 21, 21, 24, 24 | s1s6d 11383 |
. . . . . . . . . . . 12
                                 ++                          |
| 97 | 38, 39, 40 | konigsbergssiedgwen 16356 |
. . . . . . . . . . . 12
         Word                       Word                                  ++                                Word       
    |
| 98 | 88, 95, 96, 97 | syl3anc 1273 |
. . . . . . . . . . 11
       Word       
    |
| 99 | | 0ex 4216 |
. . . . . . . . . . . . . 14
 |
| 100 | 5, 99 | opvtxfvi 15897 |
. . . . . . . . . . . . 13
Vtx              |
| 101 | 100 | eqcomi 2235 |
. . . . . . . . . . . 12
    Vtx          |
| 102 | 5, 99 | opiedgfvi 15898 |
. . . . . . . . . . . . 13
iEdg          |
| 103 | 102 | eqcomi 2235 |
. . . . . . . . . . . 12
iEdg          |
| 104 | | wrd0 11142 |
. . . . . . . . . . . . 13
Word           |
| 105 | 104 | a1i 9 |
. . . . . . . . . . . 12
Word
           |
| 106 | | eqidd 2232 |
. . . . . . . . . . . . 13
  |
| 107 | 4 | a1i 9 |
. . . . . . . . . . . . 13
      |
| 108 | | upgr0eop 15992 |
. . . . . . . . . . . . . . 15
           
UPGraph |
| 109 | 4, 108 | ax-mp 5 |
. . . . . . . . . . . . . 14
      
UPGraph |
| 110 | 109 | a1i 9 |
. . . . . . . . . . . . 13
       UPGraph |
| 111 | 101, 103,
32, 106, 107, 110 | vtxdgfi0e 16165 |
. . . . . . . . . . . 12
 VtxDeg              |
| 112 | 91 | a1i 9 |
. . . . . . . . . . . 12
Vtx                      |
| 113 | | 0elfz 10353 |
. . . . . . . . . . . . . 14

      |
| 114 | 15, 113 | ax-mp 5 |
. . . . . . . . . . . . 13
     |
| 115 | 114 | a1i 9 |
. . . . . . . . . . . 12
      |
| 116 | | 3ne0 9238 |
. . . . . . . . . . . . . 14
 |
| 117 | 116 | necomi 2487 |
. . . . . . . . . . . . 13
 |
| 118 | 117 | a1i 9 |
. . . . . . . . . . . 12
  |
| 119 | | 1le3 9355 |
. . . . . . . . . . . . . 14
 |
| 120 | | elfz2nn0 10347 |
. . . . . . . . . . . . . 14
    

   |
| 121 | 7, 15, 119, 120 | mpbir3an 1205 |
. . . . . . . . . . . . 13
     |
| 122 | 121 | a1i 9 |
. . . . . . . . . . . 12
      |
| 123 | | 1re 8178 |
. . . . . . . . . . . . . 14
 |
| 124 | | 1lt3 9315 |
. . . . . . . . . . . . . 14
 |
| 125 | 123, 124 | ltneii 8276 |
. . . . . . . . . . . . 13
 |
| 126 | 125 | a1i 9 |
. . . . . . . . . . . 12
  |
| 127 | | 0ne1 9210 |
. . . . . . . . . . . . 13
 |
| 128 | 127 | a1i 9 |
. . . . . . . . . . . 12
  |
| 129 | | s1cl 11202 |
. . . . . . . . . . . . . . . . 17
           Word   |
| 130 | 9, 129 | ax-mp 5 |
. . . . . . . . . . . . . . . 16
       Word  |
| 131 | | ccatlid 11187 |
. . . . . . . . . . . . . . . 16
        Word 
++                  |
| 132 | 130, 131 | ax-mp 5 |
. . . . . . . . . . . . . . 15
 ++                 |
| 133 | 132 | eqcomi 2235 |
. . . . . . . . . . . . . 14
        ++          |
| 134 | 93, 133 | eqtri 2252 |
. . . . . . . . . . . . 13
iEdg                 ++          |
| 135 | 134 | a1i 9 |
. . . . . . . . . . . 12
iEdg                 ++           |
| 136 | 101, 32, 103, 105, 111, 112, 107, 115, 118, 122, 126, 128, 135 | vdegp1aid 16184 |
. . . . . . . . . . 11
 VtxDeg                     |
| 137 | 80 | a1i 9 |
. . . . . . . . . . 11
Vtx                         |
| 138 | | 2re 9213 |
. . . . . . . . . . . . . 14
 |
| 139 | | 3re 9217 |
. . . . . . . . . . . . . 14
 |
| 140 | | 2lt3 9314 |
. . . . . . . . . . . . . 14
 |
| 141 | 138, 139,
140 | ltleii 8282 |
. . . . . . . . . . . . 13
 |
| 142 | | elfz2nn0 10347 |
. . . . . . . . . . . . 13
    

   |
| 143 | 11, 15, 141, 142 | mpbir3an 1205 |
. . . . . . . . . . . 12
     |
| 144 | 143 | a1i 9 |
. . . . . . . . . . 11
      |
| 145 | 138, 140 | ltneii 8276 |
. . . . . . . . . . . 12
 |
| 146 | 145 | a1i 9 |
. . . . . . . . . . 11
  |
| 147 | | 0ne2 9349 |
. . . . . . . . . . . 12
 |
| 148 | 147 | a1i 9 |
. . . . . . . . . . 11
  |
| 149 | | df-s2 11341 |
. . . . . . . . . . . . 13
                  ++          |
| 150 | 82, 149 | eqtri 2252 |
. . . . . . . . . . . 12
iEdg                           ++
         |
| 151 | 150 | a1i 9 |
. . . . . . . . . . 11
iEdg                           ++           |
| 152 | 92, 32, 94, 98, 136, 137, 107, 115, 118, 144, 146, 148, 151 | vdegp1aid 16184 |
. . . . . . . . . 10
 VtxDeg                        |
| 153 | 69 | a1i 9 |
. . . . . . . . . 10
Vtx                            |
| 154 | | df-s3 11342 |
. . . . . . . . . . . 12
                        ++          |
| 155 | 71, 154 | eqtri 2252 |
. . . . . . . . . . 11
iEdg                                 ++          |
| 156 | 155 | a1i 9 |
. . . . . . . . . 10
iEdg                                 ++           |
| 157 | 81, 32, 83, 87, 152, 153, 107, 115, 118, 156 | vdegp1cid 16186 |
. . . . . . . . 9
 VtxDeg                             |
| 158 | | 0p1e1 9257 |
. . . . . . . . 9
   |
| 159 | 157, 158 | eqtrdi 2280 |
. . . . . . . 8
 VtxDeg                           |
| 160 | 58 | a1i 9 |
. . . . . . . 8
Vtx                               |
| 161 | | 1ne2 9350 |
. . . . . . . . 9
 |
| 162 | 161 | a1i 9 |
. . . . . . . 8
  |
| 163 | | df-s4 11343 |
. . . . . . . . . 10
                              ++          |
| 164 | 60, 163 | eqtri 2252 |
. . . . . . . . 9
iEdg                                       ++
         |
| 165 | 164 | a1i 9 |
. . . . . . . 8
iEdg                                       ++           |
| 166 | 70, 32, 72, 76, 159, 160, 107, 122, 126, 144, 146, 162, 165 | vdegp1aid 16184 |
. . . . . . 7
 VtxDeg                              |
| 167 | 47 | a1i 9 |
. . . . . . 7
Vtx                                  |
| 168 | | df-s5 11344 |
. . . . . . . . 9
                                    ++          |
| 169 | 49, 168 | eqtri 2252 |
. . . . . . . 8
iEdg                                             ++          |
| 170 | 169 | a1i 9 |
. . . . . . 7
iEdg                                             ++
          |
| 171 | 59, 32, 61, 65, 166, 167, 107, 122, 126, 144, 146, 162, 170 | vdegp1aid 16184 |
. . . . . 6
 VtxDeg                                 |
| 172 | 28 | a1i 9 |
. . . . . 6
Vtx                                     |
| 173 | | df-s6 11345 |
. . . . . . . 8
                                          ++          |
| 174 | 33, 173 | eqtri 2252 |
. . . . . . 7
iEdg                                                   ++
         |
| 175 | 174 | a1i 9 |
. . . . . 6
iEdg                                                   ++           |
| 176 | 48, 32, 50, 54, 171, 172, 107, 144, 146, 175 | vdegp1cid 16186 |
. . . . 5
 VtxDeg                                      |
| 177 | | 1p1e2 9260 |
. . . . 5
   |
| 178 | 176, 177 | eqtrdi 2280 |
. . . 4
 VtxDeg                                    |
| 179 | | konigsberg.v |
. . . . . 6
     |
| 180 | | konigsberg.e |
. . . . . 6
                          |
| 181 | | konigsberg.g |
. . . . . 6
    |
| 182 | 179, 180,
181 | konigsbergvtx 16352 |
. . . . 5
Vtx       |
| 183 | 182 | a1i 9 |
. . . 4
Vtx        |
| 184 | 179, 180,
181 | konigsbergiedg 16353 |
. . . . . 6
iEdg                            |
| 185 | 184, 37 | eqtri 2252 |
. . . . 5
iEdg                         ++          |
| 186 | 185 | a1i 9 |
. . . 4
iEdg                         ++           |
| 187 | 29, 32, 34, 43, 178, 183, 107, 144, 146, 186 | vdegp1cid 16186 |
. . 3
 VtxDeg         |
| 188 | 187 | mptru 1406 |
. 2
 VtxDeg        |
| 189 | | 2p1e3 9277 |
. 2
   |
| 190 | 188, 189 | eqtri 2252 |
1
 VtxDeg      |