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首页> 外文期刊>Journal of combinatorial designs >Negative Latin Square Type Partial Difference Sets and Amorphic Association Schemes with Galois Rings
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Negative Latin Square Type Partial Difference Sets and Amorphic Association Schemes with Galois Rings

机译:带有Galois环的负拉丁方类型偏差集和非晶关联方案

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摘要

A partial difference set (PDS) having parameters (n(2), r(n-1), n+r(2)-3r, r(2)-r) is called a Latin square type PDS, while a PDS having parameters (n(2), r(n+1), n+r(2)+3r, r(2)-r) is called a negative Latin square type PDS. There are relatively few known constructions of negative Latin square type PDSs, and nearly all of these are in elementary abelian groups. We show that there are three different groups of order 256 that have all possible negative Latin square type parameters. We then give generalized constructions of negative Latin square type PDSs in 2-groups. We conclude by discussing how these results fit into the context of amorphic association schemes and by stating some open problems.
机译:具有参数(n(2),r(n-1),n + r(2)-3r,r(2)-r)的偏差集(PDS)称为拉丁方型PDS,而具有参数(n(2),r(n + 1),n + r(2)+ 3r,r(2)-r)称为负拉丁方形PDS。负拉丁方型PDS的已知构造相对较少,几乎所有这些都属于基本阿贝尔群。我们显示存在三个不同的256阶的组,它们具有所有可能的负拉丁方类型参数。然后我们给出2组负拉丁方形PDS的广义构造。我们通过讨论这些结果如何适合非晶体关联方案的背景并陈述一些未解决的问题来得出结论。

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