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On this page are computer-accessible forms for the graph C4[ 104, 8 ] = PX(13,3).

(I) Following is a form readable by MAGMA:

g:=Graph<104|{ {8, 15}, {96, 103}, {88, 95}, {48, 55}, {40, 47}, {16, 23}, {24, 31}, {32, 39}, {56, 63}, {64, 71}, {72, 79}, {80, 87}, {1, 9}, {96, 104}, {81, 89}, {33, 41}, {32, 40}, {16, 24}, {17, 25}, {48, 56}, {49, 57}, {64, 72}, {65, 73}, {80, 88}, {2, 11}, {87, 94}, {82, 91}, {39, 46}, {34, 43}, {7, 14}, {18, 27}, {23, 30}, {50, 59}, {55, 62}, {66, 75}, {71, 78}, {6, 12}, {87, 93}, {86, 92}, {39, 45}, {38, 44}, {7, 13}, {22, 28}, {23, 29}, {54, 60}, {55, 61}, {70, 76}, {71, 77}, {1, 10}, {84, 95}, {81, 90}, {36, 47}, {33, 42}, {4, 15}, {17, 26}, {20, 31}, {49, 58}, {52, 63}, {65, 74}, {68, 79}, {5, 9}, {85, 89}, {37, 41}, {21, 25}, {53, 57}, {69, 73}, {3, 14}, {86, 91}, {83, 94}, {38, 43}, {35, 46}, {6, 11}, {19, 30}, {22, 27}, {51, 62}, {54, 59}, {67, 78}, {70, 75}, {2, 12}, {83, 93}, {82, 92}, {35, 45}, {34, 44}, {3, 13}, {18, 28}, {19, 29}, {50, 60}, {51, 61}, {66, 76}, {67, 77}, {5, 10}, {85, 90}, {37, 42}, {21, 26}, {53, 58}, {69, 74}, {4, 16}, {44, 56}, {36, 48}, {12, 24}, {68, 80}, {76, 88}, {8, 16}, {41, 49}, {40, 48}, {9, 17}, {72, 80}, {73, 81}, {10, 19}, {47, 54}, {42, 51}, {15, 22}, {74, 83}, {79, 86}, {14, 20}, {47, 53}, {46, 52}, {15, 21}, {78, 84}, {79, 85}, {9, 18}, {44, 55}, {41, 50}, {12, 23}, {73, 82}, {76, 87}, {13, 17}, {45, 49}, {77, 81}, {11, 22}, {46, 51}, {43, 54}, {14, 19}, {75, 86}, {78, 83}, {10, 20}, {43, 53}, {42, 52}, {11, 21}, {74, 84}, {75, 85}, {13, 18}, {45, 50}, {77, 82}, {20, 32}, {92, 104}, {84, 96}, {28, 40}, {24, 32}, {89, 97}, {88, 96}, {25, 33}, {26, 35}, {95, 102}, {90, 99}, {31, 38}, {30, 36}, {95, 101}, {94, 100}, {31, 37}, {25, 34}, {92, 103}, {89, 98}, {28, 39}, {29, 33}, {93, 97}, {27, 38}, {94, 99}, {91, 102}, {30, 35}, {26, 36}, {91, 101}, {90, 100}, {27, 37}, {29, 34}, {93, 98}, {1, 97}, {8, 104}, {3, 98}, {6, 103}, {4, 102}, {5, 103}, {2, 97}, {7, 100}, {1, 101}, {3, 102}, {6, 99}, {4, 98}, {5, 99}, {2, 101}, {8, 100}, {7, 104}, {52, 64}, {60, 72}, {56, 64}, {57, 65}, {58, 67}, {63, 70}, {62, 68}, {63, 69}, {57, 66}, {60, 71}, {61, 65}, {59, 70}, {62, 67}, {58, 68}, {59, 69}, {61, 66} }>;

(II) A more general form is to represent the graph as the orbit of {8, 15} under the group generated by the following permutations:

a: (2, 5)(4, 7)(9, 97)(10, 101)(11, 99)(12, 103)(13, 98)(14, 102)(15, 100)(16, 104)(17, 89)(18, 93)(19, 91)(20, 95)(21, 90)(22, 94)(23, 92)(24, 96)(25, 81)(26, 85)(27, 83)(28, 87)(29, 82)(30, 86)(31, 84)(32, 88)(33, 73)(34, 77)(35, 75)(36, 79)(37, 74)(38, 78)(39, 76)(40, 80)(41, 65)(42, 69)(43, 67)(44, 71)(45, 66)(46, 70)(47, 68)(48, 72)(49, 57)(50, 61)(51, 59)(52, 63)(53, 58)(54, 62)(55, 60)(56, 64)
b: (1, 3)(2, 4)(5, 7)(6, 8)(9, 13)(10, 14)(11, 15)(12, 16)(97, 98)(99, 100)(101, 102)(103, 104)
c: (81, 82)(83, 84)(85, 86)(87, 88)(89, 91)(90, 92)(93, 95)(94, 96)(97, 101)(98, 102)(99, 103)(100, 104)
d: (17, 18)(19, 20)(21, 22)(23, 24)(25, 27)(26, 28)(29, 31)(30, 32)(33, 37)(34, 38)(35, 39)(36, 40)
e: (49, 50)(51, 52)(53, 54)(55, 56)(57, 59)(58, 60)(61, 63)(62, 64)(65, 69)(66, 70)(67, 71)(68, 72)
f: (1, 9, 17, 25, 33, 41, 49, 57, 65, 73, 81, 89, 97)(2, 10, 18, 26, 34, 42, 50, 58, 66, 74, 82, 90, 98)(3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99)(4, 12, 20, 28, 36, 44, 52, 60, 68, 76, 84, 92, 100)(5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 85, 93, 101)(6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 86, 94, 102)(7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 87, 95, 103)(8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104)
g: (65, 66)(67, 68)(69, 70)(71, 72)(73, 75)(74, 76)(77, 79)(78, 80)(81, 85)(82, 86)(83, 87)(84, 88)
h: (33, 34)(35, 36)(37, 38)(39, 40)(41, 43)(42, 44)(45, 47)(46, 48)(49, 53)(50, 54)(51, 55)(52, 56)
m: (1, 2)(3, 4)(5, 6)(7, 8)(9, 11)(10, 12)(13, 15)(14, 16)(17, 21)(18, 22)(19, 23)(20, 24)
n1: (73, 74)(75, 76)(77, 78)(79, 80)(81, 83)(82, 84)(85, 87)(86, 88)(89, 93)(90, 94)(91, 95)(92, 96)
a1: (41, 42)(43, 44)(45, 46)(47, 48)(49, 51)(50, 52)(53, 55)(54, 56)(57, 61)(58, 62)(59, 63)(60, 64)
b1: (9, 10)(11, 12)(13, 14)(15, 16)(17, 19)(18, 20)(21, 23)(22, 24)(25, 29)(26, 30)(27, 31)(28, 32)
c1: (57, 58)(59, 60)(61, 62)(63, 64)(65, 67)(66, 68)(69, 71)(70, 72)(73, 77)(74, 78)(75, 79)(76, 80)
d1: (25, 26)(27, 28)(29, 30)(31, 32)(33, 35)(34, 36)(37, 39)(38, 40)(41, 45)(42, 46)(43, 47)(44, 48)

(III) Last is Groups&Graphs. Copy everything between (not including) the lines of asterisks into a plain text file and save it as "graph.txt". Then launch G&G (Groups&Graphs) and select Read Text from the File menu.

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&Graph
C4[ 104, 8 ]
104
-1 101 9 97 10
-2 11 12 101 97
-3 13 14 102 98
-4 102 15 16 98
-5 99 103 9 10
-6 11 99 12 103
-7 100 13 14 104
-8 100 15 16 104
-9 1 5 17 18
-10 1 5 19 20
-11 22 2 6 21
-12 23 2 24 6
-13 3 17 7 18
-14 3 7 19 20
-15 22 4 8 21
-16 23 24 4 8
-17 13 25 26 9
-18 13 27 28 9
-19 14 29 30 10
-20 14 31 10 32
-21 11 25 15 26
-22 11 15 27 28
-23 12 16 29 30
-24 12 16 31 32
-25 33 34 17 21
-26 35 36 17 21
-27 22 37 38 18
-28 22 39 18 40
-29 33 23 34 19
-30 23 35 36 19
-31 24 37 38 20
-32 24 39 40 20
-33 25 29 41 42
-34 44 25 29 43
-35 45 46 26 30
-36 47 26 48 30
-37 27 41 31 42
-38 44 27 31 43
-39 45 46 28 32
-40 47 48 28 32
-41 33 37 49 50
-42 33 37 51 52
-43 34 38 53 54
-44 55 34 56 38
-45 35 49 39 50
-46 35 39 51 52
-47 36 40 53 54
-48 55 56 36 40
-49 45 57 58 41
-50 45 59 60 41
-51 46 61 62 42
-52 46 63 42 64
-53 57 47 58 43
-54 47 59 60 43
-55 44 48 61 62
-56 44 48 63 64
-57 66 49 53 65
-58 67 68 49 53
-59 69 70 50 54
-60 71 50 72 54
-61 55 66 51 65
-62 55 67 68 51
-63 56 69 70 52
-64 56 71 72 52
-65 57 61 73 74
-66 57 61 75 76
-67 77 78 58 62
-68 79 58 80 62
-69 59 73 63 74
-70 59 63 75 76
-71 77 78 60 64
-72 79 80 60 64
-73 69 81 82 65
-74 69 83 84 65
-75 66 70 85 86
-76 66 88 70 87
-77 67 81 71 82
-78 67 71 83 84
-79 68 72 85 86
-80 88 68 72 87
-81 77 89 90 73
-82 77 91 92 73
-83 78 93 94 74
-84 78 95 74 96
-85 89 79 90 75
-86 79 91 92 75
-87 80 93 94 76
-88 80 95 96 76
-89 81 85 97 98
-90 99 100 81 85
-91 101 102 82 86
-92 103 82 104 86
-93 83 97 87 98
-94 99 100 83 87
-95 88 101 102 84
-96 88 103 104 84
-97 1 89 2 93
-98 89 3 4 93
-99 90 5 6 94
-100 90 94 7 8
-101 1 2 91 95
-102 3 91 4 95
-103 92 5 6 96
-104 92 7 8 96
0

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