On Some Symmetric Designs with Classical Parameters
[摘要] We describe a construction of sixty-seven symmetric (31,15,7) designs, thirty-eight symmetric (63,31,15) designs, and two symmetric (127,63,31) designs. The orders and the structures of the full automorphism groups of the constructed designs are given, as well as their 2-ranks. The designs are constructed with the help of tactical decompositions.
[发布日期] [发布机构]
[效力级别] [学科分类] 数学（综合）
[关键词] difference set. [时效性]
