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A note on λ‐designs
Journal of Combinatorial Designs ( IF 0.5 ) Pub Date : 2020-09-28 , DOI: 10.1002/jcd.21752
Ajeet K. Yadav 1 , Rajendra M. Pawale 1 , Mohan S. Shrikhande 2
Affiliation  

Let r and r′, (r > r′) be the two replication numbers of a λ ‐design D . We show that if r r is a prime power or 33, then D is a design of type‐1. We derive two inequalities, where equality holds if and only if D is a design of type‐1. Let D be a λ ‐design with two block sizes with v = n p + 1 points, where p is prime and 2 n 22 . We develop a procedure to obtain exceptions for such type‐1 λ ‐designs, refining earlier results.

中文翻译:

关于λ设计的注意事项

[R r',(r > r')是a的两个复制数 λ -设计 d 。我们证明 [R - [R 是素数或33,那么 d 是类型1的设计。我们得出两个不等式,当且仅当等式成立时,等式成立 d 是类型1的设计。让 d 成为 λ 带有两个块大小的设计 v = ñ p + 1个 点,哪里 p 是素数 2 ñ 22 我们制定了获取此类Type-1异常的程序 λ -设计,完善早期结果。
更新日期:2020-10-22
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