An upper bound on the minimum weight of Type II Z2k codes
In this paper, we give a new upper bound on the minimum Euclidean weight of Type II Z"2"k codes and the concept of extremality for the Euclidean weights when k=3,4,5,6. Together with the known result, we demonstrate that there is an extremal Type II Z"2"k code of length 8m(m=<8) when k=3,4,5,6.
J. Comb. Theory, Ser. A