Group-divisible designs with block size four and group-type g(u)m(1) with m as large or as small as possible

摘要

We investigate the spectrum for {4}-GDDs of type g(u)m(1). We determine, for each admissible pair (g, u) (with some exceptions), the maximum and minimum values of in for which a {4}-GDD of type g(u)m(1) exists. (C) 2002 Elsevier Science (USA). [References: 14]