Generalized constructions of Menon-Hadamard difference sets
Generalized constructions of Menon-Hadamard difference sets
复制标题
Menon-Hadamard 差分集的广义构造
DOI:
10.1016/j.ffa.2019.101601
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发表时间:
2020
影响因子:
1
通讯作者:
Xiang, Qing
中科院分区:
文献类型:
--
作者:
Momihara, Koji;Xiang, Qing
We revisit the problem of constructing Menon-Hadamard difference sets. In 1997, Wilson and Xiang gave a general framework for constructing Menon-Hadamard difference sets by using a combination of a spread and four projective sets of type Q in PG (3, q). They also found examples of suitable spreads and projective sets of type Q for q= 5, 13, 17. Subsequently, Chen (1997) succeeded in finding a spread and four projective sets of type Q in PG (3, q) satisfying the conditions in the Wilson-Xiang construction for all odd prime powers q. Thus, he showed that there exists a Menon-Hadamard difference set in groups of order 4 q 4 for all odd prime powers q. However, the projective sets of type Q found by Chen have automorphisms different from those of the examples constructed by Wilson and Xiang. In this paper, we first generalize Chen's construction of projective sets of type Q by using “semi-primitive” cyclotomic classes. This demonstrates that the construction of projective sets of type Q satisfying the conditions in the Wilson-Xiang construction is much more flexible than originally thought. Secondly, we give a new construction of spreads and projective sets of type Q in PG (3, q) for all odd prime powers q, which generalizes the examples found by Wilson and Xiang. This solves a problem left open in Section 5 of the Wilson-Xiang paper from 1997.
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DOI:
--
发表时间:
1997
期刊:
Journal of Combinatorial Theory
影响因子:
--
作者:
M. Eupen;V. Tonchev
通讯作者:
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DOI:
--
发表时间:
1991
期刊:
Journal of Combinatorial Theory
影响因子:
--
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通讯作者:
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DOI:
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1993
期刊:
Journal of Combinatorial Theory
影响因子:
--
作者:
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通讯作者:
Robert G. Kraemer
DOI:
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发表时间:
1984
期刊:
Journal of Combinatorial Theory
影响因子:
--
作者:
R. Turyn
通讯作者:
R. Turyn