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arXiv 2109.13992math.CO
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有限仿射平面上的特殊方向

Special directions on the finite affine plane

Gergely Kiss, Gábor Somlai

摘要:

本文研究了特征$p$的有限平面上可被$p$整除的基数集的特殊方向数,其中$p$是素数.我们证明了不存在这样一个恰好有两个特殊方向的集合。我们用正好3个特殊的方向来构造集合,这回答了Ghidelli的一个否定问题。此外,我们介绍的方法来构建集的最小基数,正好有4个特殊方向的小值$p$。

英文摘要:

In this paper we study the number of special directions of sets of cardinality divisible by $p$ on a finite plane of characteristic $p$, where $p$ is a prime. We show that there is no such a set with exactly two special directions. We characterise sets with exactly 3 special directions which answers a question of Ghidelli in negative. Further we introduce methods to construct sets of minimal cardinality that has exactly 4 special directions for small values of $p$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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