Abstract:
The cycle index of dihedral group Dn
acting on the set X
of the vertices of a regular -gon was studied (See
[1]). In this paper we study the cycle index formulas of Dn
acting on unordered pairs from the set x
. In each case the actions of the cyclic part and the reflection part are studied separately for both
an even value of n
and an odd value of n .