Author/Authors :
Li Fuzhong، نويسنده , , Weidong Gao، نويسنده ,
Abstract :
Let Zn be the cyclic group of order n. For a sequence S of elements in Zn, we use f(S) to denote the number of subsequences of S that the sum of whose terms is zero. In this paper, we determine all sequences S of elements, in Zn for which image.
