Abstract:
The study of finite extension of Galois rings in the recent past have given rise to commutative 
completely primary finite rings that have attracted much attention as they have yielded important results towards 
classification of finite rings into well-known structures. In this paper, we give a construction of a class of completely 
primary finite ring R of characteristic p whose subsets of zero divisors ( ) Z R satisfy the condition 
( ) ( ) ( ) ( ) ( ) ( ) 6 5 0 ; 0 Z R Z R =  . The ring R is constructed over its subring ( ) 0
 ,r R GR p p = as an 
idealization of the 0
 R- modules. A thorough determination and classification of the structure of the group of 
invertible elements using fundamental theorem of finitely generated abelian groups is given.