On extensions of some block designs
- 作者: Makhnev A.1
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隶属关系:
- Krasovskii Institute of Mathematics and Mechanics, Ural Branch
- 期: 卷 94, 编号 2 (2016)
- 页面: 563-565
- 栏目: Mathematics
- URL: https://journals.rcsi.science/1064-5624/article/view/224346
- DOI: https://doi.org/10.1134/S1064562416050227
- ID: 224346
如何引用文章
详细
There are some results concerning t-designs in which the number of points in the intersection of two blocks takes less than t values. For example, if t = 2, then the design is symmetric (in such a design, v = b or, equivalently, k = r). In 1974, B. Gross described t-(v, k, l) designs that, for some integer s, 0 < s < t, do not contain two blocks intersecting at exactly s points. Below, it is proved that potentially infinite series of designs from the claim of Gross’ theorem are finite. Gross’ theorem is substantially sharpened.
作者简介
A. Makhnev
Krasovskii Institute of Mathematics and Mechanics, Ural Branch
编辑信件的主要联系方式.
Email: makhnev@imm.uran.ru
俄罗斯联邦, Yekaterinburg, 620219