| Step | Hyp | Ref
| Expression |
| 1 | | 0z 9490 |
. . . . . . 7
 |
| 2 | | 3z 9508 |
. . . . . . 7
 |
| 3 | | fzfig 10693 |
. . . . . . 7
 
       |
| 4 | 1, 2, 3 | mp2an 426 |
. . . . . 6
     |
| 5 | 4 | elexi 2815 |
. . . . 5
     |
| 6 | | 0nn0 9417 |
. . . . . . . . . 10
 |
| 7 | | 1nn0 9418 |
. . . . . . . . . 10
 |
| 8 | | prexg 4301 |
. . . . . . . . . 10
 
      |
| 9 | 6, 7, 8 | mp2an 426 |
. . . . . . . . 9
    |
| 10 | 9 | a1i 9 |
. . . . . . . 8
     |
| 11 | | 2nn0 9419 |
. . . . . . . . . 10
 |
| 12 | | prexg 4301 |
. . . . . . . . . 10
 
      |
| 13 | 6, 11, 12 | mp2an 426 |
. . . . . . . . 9
    |
| 14 | 13 | a1i 9 |
. . . . . . . 8
     |
| 15 | | 3nn0 9420 |
. . . . . . . . . 10
 |
| 16 | | prexg 4301 |
. . . . . . . . . 10
 
      |
| 17 | 6, 15, 16 | mp2an 426 |
. . . . . . . . 9
    |
| 18 | 17 | a1i 9 |
. . . . . . . 8
     |
| 19 | | prexg 4301 |
. . . . . . . . . 10
 
      |
| 20 | 7, 11, 19 | mp2an 426 |
. . . . . . . . 9
    |
| 21 | 20 | a1i 9 |
. . . . . . . 8
     |
| 22 | | prexg 4301 |
. . . . . . . . . 10
 
      |
| 23 | 11, 15, 22 | mp2an 426 |
. . . . . . . . 9
    |
| 24 | 23 | a1i 9 |
. . . . . . . 8
     |
| 25 | 10, 14, 18, 21, 21, 24 | s6cld 11367 |
. . . . . . 7
                      Word   |
| 26 | 25 | mptru 1406 |
. . . . . 6
                      Word  |
| 27 | 26 | elexi 2815 |
. . . . 5
                       |
| 28 | 5, 27 | opvtxfvi 15897 |
. . . 4
Vtx                                    |
| 29 | 28 | eqcomi 2235 |
. . 3
    Vtx                                |
| 30 | | 1le3 9355 |
. . . . 5
 |
| 31 | | elfz2nn0 10347 |
. . . . 5
    

   |
| 32 | 7, 15, 30, 31 | mpbir3an 1205 |
. . . 4
     |
| 33 | 32 | a1i 9 |
. . 3
      |
| 34 | 5, 27 | opiedgfvi 15898 |
. . . 4
iEdg                                                      |
| 35 | 34 | eqcomi 2235 |
. . 3
                      iEdg                                |
| 36 | 24 | s1cld 11203 |
. . . . . 6
       Word   |
| 37 | 36 | mptru 1406 |
. . . . 5
       Word  |
| 38 | | df-s7 11346 |
. . . . 5
                                                ++          |
| 39 | | eqid 2231 |
. . . . . 6
         |
| 40 | | eqid 2231 |
. . . . . 6
                                                   |
| 41 | | eqid 2231 |
. . . . . 6
                                                                 |
| 42 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . 5
                        Word
       Word                                                 ++                                Word       
    |
| 43 | 26, 37, 38, 42 | mp3an 1373 |
. . . 4
                      Word       
   |
| 44 | 43 | a1i 9 |
. . 3
                      Word            |
| 45 | 10, 14, 18, 21, 21 | s5cld 11366 |
. . . . . . . 8
                   Word   |
| 46 | 45 | mptru 1406 |
. . . . . . 7
                   Word  |
| 47 | 46 | elexi 2815 |
. . . . . 6
                    |
| 48 | 5, 47 | opvtxfvi 15897 |
. . . . 5
Vtx                                 |
| 49 | 48 | eqcomi 2235 |
. . . 4
    Vtx                             |
| 50 | 5, 47 | opiedgfvi 15898 |
. . . . 5
iEdg                                                |
| 51 | 50 | eqcomi 2235 |
. . . 4
                   iEdg                             |
| 52 | 24, 24 | s2cld 11363 |
. . . . 5
          Word   |
| 53 | 10, 14, 18, 21, 21, 24, 24 | s5s2d 11390 |
. . . . 5
                                             ++              |
| 54 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . 5
                     Word           Word                                              ++                                Word       
    |
| 55 | 45, 52, 53, 54 | syl3anc 1273 |
. . . 4
                   Word       
    |
| 56 | 10, 14, 18, 21 | s4cld 11365 |
. . . . . . . . . 10
                Word   |
| 57 | 56 | mptru 1406 |
. . . . . . . . 9
                Word  |
| 58 | 57 | elexi 2815 |
. . . . . . . 8
                 |
| 59 | 5, 58 | opvtxfvi 15897 |
. . . . . . 7
Vtx                              |
| 60 | 59 | eqcomi 2235 |
. . . . . 6
    Vtx                          |
| 61 | 5, 58 | opiedgfvi 15898 |
. . . . . . 7
iEdg                                          |
| 62 | 61 | eqcomi 2235 |
. . . . . 6
                iEdg                          |
| 63 | 21, 24, 24 | s3cld 11364 |
. . . . . . 7
             Word   |
| 64 | 10, 14, 18, 21, 21, 24, 24 | s4s3d 11387 |
. . . . . . 7
                                          ++                 |
| 65 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . . . 7
                  Word              Word                                           ++                                Word       
    |
| 66 | 56, 63, 64, 65 | syl3anc 1273 |
. . . . . 6
                Word       
    |
| 67 | 10, 14, 18 | s3cld 11364 |
. . . . . . . . . . . 12
             Word   |
| 68 | 67 | mptru 1406 |
. . . . . . . . . . 11
             Word  |
| 69 | 68 | elexi 2815 |
. . . . . . . . . 10
              |
| 70 | 5, 69 | opvtxfvi 15897 |
. . . . . . . . 9
Vtx                           |
| 71 | 70 | eqcomi 2235 |
. . . . . . . 8
    Vtx                       |
| 72 | 5, 69 | opiedgfvi 15898 |
. . . . . . . . 9
iEdg                                    |
| 73 | 72 | eqcomi 2235 |
. . . . . . . 8
             iEdg                       |
| 74 | 21, 21, 24, 24 | s4cld 11365 |
. . . . . . . . 9
                Word   |
| 75 | 10, 14, 18, 21, 21, 24, 24 | s3s4d 11388 |
. . . . . . . . 9
                                       ++                    |
| 76 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . . . . . 9
               Word                 Word                                        ++                                Word       
    |
| 77 | 67, 74, 75, 76 | syl3anc 1273 |
. . . . . . . 8
             Word       
    |
| 78 | 10, 14 | s2cld 11363 |
. . . . . . . . . . . . 13
          Word   |
| 79 | 78 | mptru 1406 |
. . . . . . . . . . . 12
          Word  |
| 80 | 79 | elexi 2815 |
. . . . . . . . . . 11
           |
| 81 | 5, 80 | opvtxfvi 15897 |
. . . . . . . . . 10
Vtx                        |
| 82 | 81 | eqcomi 2235 |
. . . . . . . . 9
    Vtx                    |
| 83 | 5, 80 | opiedgfvi 15898 |
. . . . . . . . . 10
iEdg                              |
| 84 | 83 | eqcomi 2235 |
. . . . . . . . 9
          iEdg                    |
| 85 | 18, 21, 21, 24, 24 | s5cld 11366 |
. . . . . . . . . 10
                   Word   |
| 86 | 10, 14, 18, 21, 21, 24, 24 | s2s5d 11389 |
. . . . . . . . . 10
                                    ++
                      |
| 87 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . . . . . . 10
            Word
                   Word                                     ++                                Word       
    |
| 88 | 78, 85, 86, 87 | syl3anc 1273 |
. . . . . . . . 9
          Word            |
| 89 | 10 | s1cld 11203 |
. . . . . . . . . . . . . 14
       Word   |
| 90 | 89 | mptru 1406 |
. . . . . . . . . . . . 13
       Word  |
| 91 | 90 | elexi 2815 |
. . . . . . . . . . . 12
        |
| 92 | 5, 91 | opvtxfvi 15897 |
. . . . . . . . . . 11
Vtx                     |
| 93 | 92 | eqcomi 2235 |
. . . . . . . . . 10
    Vtx                 |
| 94 | 5, 91 | opiedgfvi 15898 |
. . . . . . . . . . 11
iEdg                        |
| 95 | 94 | eqcomi 2235 |
. . . . . . . . . 10
       iEdg                 |
| 96 | 14, 18, 21, 21, 24, 24 | s6cld 11367 |
. . . . . . . . . . 11
                      Word   |
| 97 | 10, 14, 18, 21, 21, 24, 24 | s1s6d 11383 |
. . . . . . . . . . 11
                                 ++                          |
| 98 | 39, 40, 41 | konigsbergssiedgwen 16356 |
. . . . . . . . . . 11
         Word                       Word                                  ++                                Word       
    |
| 99 | 89, 96, 97, 98 | syl3anc 1273 |
. . . . . . . . . 10
       Word       
    |
| 100 | | 0ex 4216 |
. . . . . . . . . . . . . 14
 |
| 101 | 5, 100 | opvtxfvi 15897 |
. . . . . . . . . . . . 13
Vtx              |
| 102 | 101 | eqcomi 2235 |
. . . . . . . . . . . 12
    Vtx          |
| 103 | 5, 100 | opiedgfvi 15898 |
. . . . . . . . . . . . 13
iEdg          |
| 104 | 103 | eqcomi 2235 |
. . . . . . . . . . . 12
iEdg          |
| 105 | | wrd0 11142 |
. . . . . . . . . . . . 13
Word           |
| 106 | 105 | a1i 9 |
. . . . . . . . . . . 12
Word
           |
| 107 | | eqidd 2232 |
. . . . . . . . . . . . 13
  |
| 108 | 4 | a1i 9 |
. . . . . . . . . . . . 13
      |
| 109 | | upgr0eop 15992 |
. . . . . . . . . . . . . 14
           
UPGraph |
| 110 | 4, 109 | mp1i 10 |
. . . . . . . . . . . . 13
       UPGraph |
| 111 | 102, 104,
33, 107, 108, 110 | vtxdgfi0e 16165 |
. . . . . . . . . . . 12
 VtxDeg              |
| 112 | 92 | a1i 9 |
. . . . . . . . . . . 12
Vtx                      |
| 113 | | 0elfz 10353 |
. . . . . . . . . . . . 13

      |
| 114 | 15, 113 | mp1i 10 |
. . . . . . . . . . . 12
      |
| 115 | | 0ne1 9210 |
. . . . . . . . . . . . 13
 |
| 116 | 115 | a1i 9 |
. . . . . . . . . . . 12
  |
| 117 | | s1cl 11202 |
. . . . . . . . . . . . . . 15
           Word   |
| 118 | | ccatlid 11187 |
. . . . . . . . . . . . . . 15
        Word 
++                  |
| 119 | 9, 117, 118 | mp2b 8 |
. . . . . . . . . . . . . 14
 ++                 |
| 120 | 94, 119 | eqtr4i 2255 |
. . . . . . . . . . . . 13
iEdg                 ++          |
| 121 | 120 | a1i 9 |
. . . . . . . . . . . 12
iEdg                 ++           |
| 122 | 102, 33, 104, 106, 111, 112, 108, 114, 116, 121 | vdegp1cid 16186 |
. . . . . . . . . . 11
 VtxDeg                       |
| 123 | | 0p1e1 9257 |
. . . . . . . . . . 11
   |
| 124 | 122, 123 | eqtrdi 2280 |
. . . . . . . . . 10
 VtxDeg                     |
| 125 | 81 | a1i 9 |
. . . . . . . . . 10
Vtx                         |
| 126 | | 2re 9213 |
. . . . . . . . . . . . 13
 |
| 127 | | 3re 9217 |
. . . . . . . . . . . . 13
 |
| 128 | | 2lt3 9314 |
. . . . . . . . . . . . 13
 |
| 129 | 126, 127,
128 | ltleii 8282 |
. . . . . . . . . . . 12
 |
| 130 | | elfz2nn0 10347 |
. . . . . . . . . . . 12
    

   |
| 131 | 11, 15, 129, 130 | mpbir3an 1205 |
. . . . . . . . . . 11
     |
| 132 | 131 | a1i 9 |
. . . . . . . . . 10
      |
| 133 | | 1ne2 9350 |
. . . . . . . . . . . 12
 |
| 134 | 133 | necomi 2487 |
. . . . . . . . . . 11
 |
| 135 | 134 | a1i 9 |
. . . . . . . . . 10
  |
| 136 | | 0ne2 9349 |
. . . . . . . . . . 11
 |
| 137 | 136 | a1i 9 |
. . . . . . . . . 10
  |
| 138 | | df-s2 11341 |
. . . . . . . . . . . 12
                  ++          |
| 139 | 83, 138 | eqtri 2252 |
. . . . . . . . . . 11
iEdg                           ++
         |
| 140 | 139 | a1i 9 |
. . . . . . . . . 10
iEdg                           ++           |
| 141 | 93, 33, 95, 99, 124, 125, 108, 114, 116, 132, 135, 137, 140 | vdegp1aid 16184 |
. . . . . . . . 9
 VtxDeg                        |
| 142 | 70 | a1i 9 |
. . . . . . . . 9
Vtx                            |
| 143 | | nn0fz0 10354 |
. . . . . . . . . . 11

      |
| 144 | 15, 143 | mpbi 145 |
. . . . . . . . . 10
     |
| 145 | 144 | a1i 9 |
. . . . . . . . 9
      |
| 146 | | 1re 8178 |
. . . . . . . . . . 11
 |
| 147 | | 1lt3 9315 |
. . . . . . . . . . 11
 |
| 148 | 146, 147 | gtneii 8275 |
. . . . . . . . . 10
 |
| 149 | 148 | a1i 9 |
. . . . . . . . 9
  |
| 150 | | 3ne0 9238 |
. . . . . . . . . . 11
 |
| 151 | 150 | necomi 2487 |
. . . . . . . . . 10
 |
| 152 | 151 | a1i 9 |
. . . . . . . . 9
  |
| 153 | | df-s3 11342 |
. . . . . . . . . . 11
                        ++          |
| 154 | 72, 153 | eqtri 2252 |
. . . . . . . . . 10
iEdg                                 ++          |
| 155 | 154 | a1i 9 |
. . . . . . . . 9
iEdg                                 ++           |
| 156 | 82, 33, 84, 88, 141, 142, 108, 114, 116, 145, 149, 152, 155 | vdegp1aid 16184 |
. . . . . . . 8
 VtxDeg                           |
| 157 | 59 | a1i 9 |
. . . . . . . 8
Vtx                               |
| 158 | | df-s4 11343 |
. . . . . . . . . 10
                              ++          |
| 159 | 61, 158 | eqtri 2252 |
. . . . . . . . 9
iEdg                                       ++
         |
| 160 | 159 | a1i 9 |
. . . . . . . 8
iEdg                                       ++           |
| 161 | 71, 33, 73, 77, 156, 157, 108, 132, 135, 160 | vdegp1bid 16185 |
. . . . . . 7
 VtxDeg                                |
| 162 | | 1p1e2 9260 |
. . . . . . 7
   |
| 163 | 161, 162 | eqtrdi 2280 |
. . . . . 6
 VtxDeg                              |
| 164 | 48 | a1i 9 |
. . . . . 6
Vtx                                  |
| 165 | | df-s5 11344 |
. . . . . . . 8
                                    ++          |
| 166 | 50, 165 | eqtri 2252 |
. . . . . . 7
iEdg                                             ++          |
| 167 | 166 | a1i 9 |
. . . . . 6
iEdg                                             ++
          |
| 168 | 60, 33, 62, 66, 163, 164, 108, 132, 135, 167 | vdegp1bid 16185 |
. . . . 5
 VtxDeg                                   |
| 169 | | 2p1e3 9277 |
. . . . 5
   |
| 170 | 168, 169 | eqtrdi 2280 |
. . . 4
 VtxDeg                                 |
| 171 | 28 | a1i 9 |
. . . 4
Vtx                                     |
| 172 | 126, 128 | ltneii 8276 |
. . . . 5
 |
| 173 | 172 | a1i 9 |
. . . 4
  |
| 174 | | df-s6 11345 |
. . . . . 6
                                          ++          |
| 175 | 34, 174 | eqtri 2252 |
. . . . 5
iEdg                                                   ++
         |
| 176 | 175 | a1i 9 |
. . . 4
iEdg                                                   ++           |
| 177 | 49, 33, 51, 55, 170, 171, 108, 132, 135, 145, 149, 173, 176 | vdegp1aid 16184 |
. . 3
 VtxDeg                                    |
| 178 | | konigsberg.v |
. . . . 5
     |
| 179 | | konigsberg.e |
. . . . 5
                          |
| 180 | | konigsberg.g |
. . . . 5
    |
| 181 | 178, 179,
180 | konigsbergvtx 16352 |
. . . 4
Vtx       |
| 182 | 181 | a1i 9 |
. . 3
Vtx        |
| 183 | 178, 179,
180 | konigsbergiedg 16353 |
. . . . 5
iEdg                            |
| 184 | 183, 38 | eqtri 2252 |
. . . 4
iEdg                         ++          |
| 185 | 184 | a1i 9 |
. . 3
iEdg                         ++           |
| 186 | 29, 33, 35, 44, 177, 182, 108, 132, 135, 145, 149, 173, 185 | vdegp1aid 16184 |
. 2
 VtxDeg       |
| 187 | 186 | mptru 1406 |
1
 VtxDeg      |