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

机译:关于(x(q + 1),x; 2,q)-超超混合的研究

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In this paper, we study the weighted (x(q + 1), x; 2, q)-minihypers. These are weighted sets of x(q + 1) points in PG(2, q) intersecting every line in at least x points. We investigate the decomposability of these minihypers, and define a switching construction which associates to an (x(q + 1), x; 2, q)-minihyper, with x ≤ q 2 − q, not decomposable in the sum of another minihyper and a line, a (j(q + 1), j; 2, q)-minihyper, where j = q 2 − 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. Keywords Minihypers - Multisets - Griesmer bound Mathematics Subject Classifications (2000) 05B25 - 51E20 - 51E21 Communicated by J. D. Key.
机译:在本文中,我们研究了加权(x(q + 1),x; 2,q)-超混合。这些是PG(2,q)中的x(q + 1)点的加权集合,该点在至少x点中与每条线相交。我们研究了这些迷你超分解的可分解性,并定义了与(x(q + 1),x; 2,q)-迷你超关联的开关构造,其中x≤q 2 − q,而不是可分解为另一个minihyper和一行(j(q + 1),j; 2,q)-minihyper的和,其中j = q 2 − q-x,同样不可分解为另一个minihyper和一行的总和。我们还表征了特定的(x(q + 1),x; 2,q)-超混合,并给出了新的例子。此外,我们证明了(x(q + 1),x; 2,q)-超混合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对(x(q + 1),x; 2,q)-超hyperpers的研究(Des Codes Cryptogr 44:169-196,2007),并在这些超hyperpers上给出了进一步的结果。关键字Minihypers-多集-Griesmer界数学学科分类(2000)05B25-51E20-51E21由J. D. Key交流。

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