The Cyclic Decomposition of the Factor Group cf (Dn×C3 ,Z )/R(Dn×C3 ) When n is an Odd Number

Kareem Abass Layith AL-Ghurabi

Abstract


Let Dn be the dihedral group , C3 be the cyclic group of order 3 and Dnh is the direct product group of Dn and C3 (i.e. Dn×C3) . Let  cf(Dn ×C3,Z) be the abelian group of Z-valued class functions of the group Dn ×C3 . The intersection cf(Dn ×C3,Z) with the group of all generalized characters of Dn ×C3 which is denoted by (Dn ×C3) , is a normal subgroup of cf(Dn ×C3,Z) denoted by

(Dn ×C3) , then factor group cf(Dn ×C3,Z)/(Dn ×C3) is a finite abelian  group denoted by K(Dn ×C3) .

The problem of determining the cyclic decomposition of the group

K(Dn ×C3) seem to be untouched .

The  aim of this paper is to find the cyclic decomposition of this group.

We find that when n is an odd number such that  , where all  are distinct  primes , then

K(Dn ×C3)=C4C3 C8.


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