Combinatorica ( IF 1.0 ) Pub Date : 2021-02-01 , DOI: 10.1007/s00493-020-4419-z Bence Csajbók , Zsuzsa Weiner
In this paper, we generalize the so-called Korchmáros—Mazzocca arcs, that is, point sets of size q + t intersecting each line in 0, 2 or t points in a finite projective plane of order q. For t ≠ 2, this means that each point of the point set is incident with exactly one line meeting the point set in t points.
In PG(2, pn), we change 2 in the definition above to any integer m and describe all examples when m or t is not divisible by p. We also study mod p variants of these objects, give examples and under some conditions we prove the existence of a nucleus.
中文翻译:
泛化Korchmáros-Mazzocca弧
在本文中,我们概括所谓Korchmáros-Mazzocca弧,即,点集的大小q +吨相交在0,2或每行吨个量级的有限射影平面q。对于t ≠2,这意味着该点集的每个点都与恰好一条线相交,该直线与t点中的点集相交。
在PG(2,p n)中,我们将以上定义中的2更改为任何整数m,并描述m或t无法被p整除的所有示例。我们还研究了这些物体的mod p变体,给出了例子,并在某些条件下证明了核的存在。