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首页> 外文期刊>Ars Combinatoria: An Australian-Canadian Journal of Combinatorics >The spectrum for self-converse directed BIBDs with block size four
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The spectrum for self-converse directed BIBDs with block size four

机译:块大小为4的自反向定向BIBD的频谱

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摘要

A directed balanced incomplete block design (DB(k. λ; v)) (X, B) is called soli-converse if there is an isomorpliic mapping f from (X, B) to (X, B-1). where B1 = {B-1 : B ∈ B} and B-1 = (x_k,x_k-1,...,x_2,x_1) for B = (x_1,x_2,...,x_k-1,x_k). In this paper, we give the existence spectrum for sell-converse DB{4,λ:v) for any λ ≥ 1.
机译:如果存在从(X,B)到(X,B-1)的等素映射f,则有向平衡不完全块设计(DB(k。λ; v))(X,B)被称为孤逆。其中B1 = {B-1:B∈B}并且B-1 =(x_k,x_k-1,...,x_2,x_1)对于B =(x_1,x_2,...,x_k-1,x_k) 。在本文中,我们给出了任何λ≥1的逆向销售量DB {4,λ:v)的存在谱。

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