1020 Graph labelling
40.4 Edge-magic heptagon
Label the vertices and edges with the fourteen numbers 1, 2,..., 14
(without repetition) so that the sum of the three numbers along each
edge is constant.
ann
(Ann)
#1
1020 Graph labelling
Label the vertices and edges with the fourteen numbers 1, 2,..., 14
(without repetition) so that the sum of the three numbers along each
edge is constant.