A study of (x(q + 1), x; 2, q)-minihypers

A study of (x(q + 1), x; 2, q)-minihypers
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(x(q 1), x; 2, q)-minihypers 的研究

DOI:
10.1007/s10623-009-9314-y
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发表时间:
2010
期刊:
Des. Codes Cryptogr.
影响因子:
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通讯作者:
L. Storme
L. Storme
中科院分区:
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文献类型:
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作者:
I. Landjev;L. Storme

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本文研究了加权(x(q+ 1),x; 2,q)-迷你超.这些是PG(2,q)中x(q+ 1)个点的加权集合,与至少x个点中的每条线相交。我们研究了这些迷你超的可分解性,并定义了一个转换结构,它与一个(x(q+ 1),x; 2,q)-迷你超相关联,其中x ≤q2−q,不能分解为另一个迷你超和一条线的和,a(j(q+ 1),j; 2,q)-迷你超,其中j =q2−q−x,也不能分解为另一个迷你超和一条线的和。我们还刻画了特殊的(x(q+ 1),x; 2,q)-minihypers,并给出了新的例子.此外,我们还证明了(x(q+ 1),x; 2,q)-minihypers可以描述为线的有理和.通过这种方式,这项工作继续了Hill和Ward(Des Codes Cryptogr 44:169-196,2007)对(x(q+ 1),x; 2,q)-minihypers的研究,给出了这些minihypers的进一步结果。
In this paper, we study the weighted (x(q+ 1),x; 2,q)-minihypers. These are weighted sets ofx(q+ 1) points in PG(2,q) intersecting every line in at leastxpoints. We investigate the decomposability of these minihypers, and define a switching construction which associates to an (x(q+ 1),x; 2,q)-minihyper, withx≤q2−q, not decomposable in the sum of another minihyper and a line, a (j(q+ 1),j; 2,q)-minihyper, wherej=q2−q−x, again not decomposable into the sum of another minihyper and a line. We also characterize particular (x(q+ 1),x; 2,q)-minihypers, and give new examples. Additionally, we show that (x(q+ 1),x; 2,q)-minihypers can be described as rational sums of lines. In this way, this work continues the research on (x(q+ 1),x; 2,q)-minihypers by Hill and Ward (Des Codes Cryptogr 44:169–196, 2007), giving further results on these minihypers.